SettingsCardiac electrophysiology
Accelerated idioventricular rhythm
In accelerated idioventricular rhythm, the rate of cardiac contraction is determined by the intrinsic rate of depolarisation of the cardiac cells.
In accelerated idioventricular rhythm, the rate of cardiac contraction is determined by the intrinsic rate of depolarisation of the cardiac cells.
Afterdepolarization
Afterdepolarizations are abnormal depolarizations of cardiac myocytes that interrupt phase 2, phase 3, or phase 4 of the cardiac action potential in the electrical conduction system of the heart.
Afterdepolarizations are abnormal depolarizations of cardiac myocytes that interrupt phase 2, phase 3, or phase 4 of the cardiac action potential in the electrical conduction system of the heart.
Andersen–Tawil syndrome
Andersen–Tawil syndrome. also called Andersen syndrome and Long QT syndrome 7 is a form of long QT syndrome.
Andersen–Tawil syndrome. also called Andersen syndrome and Long QT syndrome 7 is a form of long QT syndrome.
Anthony Adducci
Anthony J. Adducci ( August 14, 1937 – September 19, 2006) was a pioneer of the medical device industry in Minnesota.
Anthony J. Adducci ( August 14, 1937 – September 19, 2006) was a pioneer of the medical device industry in Minnesota.
Antiarrhythmic agent
Antiarrhythmic agents are a group of pharmaceuticals that are used to suppress abnormal rhythms of the heart (cardiac arrhythmias), such as atrial fibrillation, atrial flutter, ventricular tachy...
Antiarrhythmic agents are a group of pharmaceuticals that are used to suppress abnormal rhythms of the heart (cardiac arrhythmias), such as atrial fibrillation, atrial flutter, ventricular tachy...
Artificial cardiac pacemaker
A pacemaker (or artificial pacemaker, so as not to be confused with the heart's natural pacemaker) is a medical device that uses electrical impulses, delivered by electrodes contacting the...
A pacemaker (or artificial pacemaker, so as not to be confused with the heart's natural pacemaker) is a medical device that uses electrical impulses, delivered by electrodes contacting the...
Artificial pacemaker
A pacemaker (or artificial pacemaker, so as not to be confused with the heart's natural pacemaker) is a medical device that uses electrical impulses, delivered by electrodes contacting the...
A pacemaker (or artificial pacemaker, so as not to be confused with the heart's natural pacemaker) is a medical device that uses electrical impulses, delivered by electrodes contacting the...
Ashman phenomenon
First described by Gouaux and Ashman in 1947, Ashman phenomenon, also known as Ashman beats, describes a particular type of wide complex tachycardia (fast rhythm of the heart) that is ofte...
First described by Gouaux and Ashman in 1947, Ashman phenomenon, also known as Ashman beats, describes a particular type of wide complex tachycardia (fast rhythm of the heart) that is ofte...
Atrial action potential
The atrial action potential are action potentials that occur in the heart atrium.
The atrial action potential are action potentials that occur in the heart atrium.
Atrial fibrillation
Atrial fibrillation is the most common cardiac arrhythmia, and involves the two upper chambers of the heart.
Atrial fibrillation is the most common cardiac arrhythmia, and involves the two upper chambers of the heart.
Atrial flutter
Atrial flutter (AFL) is an abnormal heart rhythm that occurs in the atria of the heart.
Atrial flutter (AFL) is an abnormal heart rhythm that occurs in the atria of the heart.
Atrial tachycardia
Atrial tachycardia is a type of atrial arrhythmia in which the heart's electrical impulse comes from an ectopic atrial pacemaker rather than from the SA node.
Atrial tachycardia is a type of atrial arrhythmia in which the heart's electrical impulse comes from an ectopic atrial pacemaker rather than from the SA node.
Automated external defibrillator
An automated external defibrillator or AED is a portable electronic device that automatically diagnoses the potentially life threatening cardiac arrhythmias of ventricular fibrillation an...
An automated external defibrillator or AED is a portable electronic device that automatically diagnoses the potentially life threatening cardiac arrhythmias of ventricular fibrillation an...
AV nodal reentrant tachycardia
AV nodal reentrant tachycardia (AVNRT), or atrioventricular nodal reentrant tachycardia, is a type of tachycardia (fast rhythm) of the heart.
AV nodal reentrant tachycardia (AVNRT), or atrioventricular nodal reentrant tachycardia, is a type of tachycardia (fast rhythm) of the heart.
Ballistocardiography
The ballistocardiograph is a measure of ballistic forces on the heart.
The ballistocardiograph is a measure of ballistic forces on the heart.
Barouh Berkovits
Barouh Berkovits is one of the pioneers of Bio-engineering; particularly the cardiac defibrillator and artificial cardiac pacemaker.
Barouh Berkovits is one of the pioneers of Bio-engineering; particularly the cardiac defibrillator and artificial cardiac pacemaker.
Bidomain
The bidomain model is a mathematical model of the electrical properties of cardiac muscle that takes into account the anisotropy of both the intracellular and extracellular spaces.
The bidomain model is a mathematical model of the electrical properties of cardiac muscle that takes into account the anisotropy of both the intracellular and extracellular spaces.
Bifascicular block
Bifascicular block is a conduction abnormality in the heart where two of the three main fascicles of the His/Purkinje system are blocked.
Bifascicular block is a conduction abnormality in the heart where two of the three main fascicles of the His/Purkinje system are blocked.
Biotronik
BIOTRONIK (Biotronik SE & Co. KG; Biotronik Worldwide) is a privately-held multinational biomedical technology company headquartered in Berlin, Germany.
BIOTRONIK (Biotronik SE & Co. KG; Biotronik Worldwide) is a privately-held multinational biomedical technology company headquartered in Berlin, Germany.
Brugada syndrome
The Brugada syndrome is a genetic disease that is characterised by abnormal electrocardiogram (ECG) findings and an increased risk of sudden cardiac death.
The Brugada syndrome is a genetic disease that is characterised by abnormal electrocardiogram (ECG) findings and an increased risk of sudden cardiac death.
Bundle branch block
A bundle branch block refers to a defect of the heart's electrical conduction system.
A bundle branch block refers to a defect of the heart's electrical conduction system.
Bundle of His
The bundle of His, known as the AV bundle or atrioventricular bundle, is a collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the...
The bundle of His, known as the AV bundle or atrioventricular bundle, is a collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the...
Cameron Health
Cameron Health is a medical device developer based in San Clemente, California, USA. Cameron Health has its European office, Cameron Health BV, in Arnhem, The Netherlands.
Cameron Health is a medical device developer based in San Clemente, California, USA. Cameron Health has its European office, Cameron Health BV, in Arnhem, The Netherlands.
Cardiac action potential
The cardiac action potential is a specialized action potential in the heart, necessary for the electrical conduction system of the heart.
The cardiac action potential is a specialized action potential in the heart, necessary for the electrical conduction system of the heart.
Cardiac dysrhythmia
Cardiac dysrhythmia is a term for any of a large and heterogeneous group of conditions in which there is abnormal electrical activity in the heart.
Cardiac dysrhythmia is a term for any of a large and heterogeneous group of conditions in which there is abnormal electrical activity in the heart.
Cardiac electrophysiology
Cardiac electrophysiology is the science of elucidating, diagnosing, and treating the electrical activities of the heart.
Cardiac electrophysiology is the science of elucidating, diagnosing, and treating the electrical activities of the heart.
Cardiac monitoring
The phrase cardiac monitoring generally refers to continuous monitoring with electrocardiography with assessment of the patients condition relative to their cardiac rhythm.
The phrase cardiac monitoring generally refers to continuous monitoring with electrocardiography with assessment of the patients condition relative to their cardiac rhythm.
Cardiac muscle
Cardiac muscle is a type of involuntary striated muscle found in the walls and histological foundation of the heart, specifically the myocardium.
Cardiac muscle is a type of involuntary striated muscle found in the walls and histological foundation of the heart, specifically the myocardium.
Cardiac pacemaker
The cells that create these rhythmical impulses are called pacemaker cells, and they directly control the heart rate.
The cells that create these rhythmical impulses are called pacemaker cells, and they directly control the heart rate.
Cardiac rhythmicity
Cardiac rhythmicity is the spontaneous depolarization and repolarization event that occurs in a repetitive and stable manner within the cardiac muscle.
Cardiac rhythmicity is the spontaneous depolarization and repolarization event that occurs in a repetitive and stable manner within the cardiac muscle.
Cardiac striated muscle
Cardiac muscle is a type of involuntary striated muscle found in the walls and histologic foundation of the heart, specifically the myocardium.
Cardiac muscle is a type of involuntary striated muscle found in the walls and histologic foundation of the heart, specifically the myocardium.
Cardiac transient outward potassium current
The cardiac transient outward potassium current (Ito1) is the main contributing current to the repolarizing phase 1 of the cardiac action potential, and results from movement of potass...
The cardiac transient outward potassium current (Ito1) is the main contributing current to the repolarizing phase 1 of the cardiac action potential, and results from movement of potass...
Catecholaminergic polymorphic ventricular tachycardia
Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT) is an electrophysiological disorder of the heart that occurs in genetically predisposed individuals.
Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT) is an electrophysiological disorder of the heart that occurs in genetically predisposed individuals.
Catheter ablation
Catheter ablation is an invasive procedure used to remove a faulty electrical pathway from the hearts of those who are prone to developing cardiac arrhythmias such as atrial fibrillation, atrial...
Catheter ablation is an invasive procedure used to remove a faulty electrical pathway from the hearts of those who are prone to developing cardiac arrhythmias such as atrial fibrillation, atrial...
Celivarone
Celivarone 2-butyl-3--1-benzofuran-5-carboxylate isopropyl fumarate
Is an experimental drug being tested for use in pharmacological anti-arrhythmic therapy.
Celivarone 2-butyl-3--1-benzofuran-5-carboxylate isopropyl fumarate
Is an experimental drug being tested for use in pharmacological anti-arrhythmic therapy.
Clinical cardiac electrophysiology
Cardiac Electrophysiology (also referred to as clinical cardiac electrophysiology, Arrhythmia Services, or electrophysiology), is a branch of the medical specialty of clinical ...
Cardiac Electrophysiology (also referred to as clinical cardiac electrophysiology, Arrhythmia Services, or electrophysiology), is a branch of the medical specialty of clinical ...
Cooper-Saeed Waves
Cooper-Saeed waves refer to donor heart conducted P waves on the 12-lead ECG tracing of heart transplant recipients, also demonstrating nonconducted P waves of the recipient heart.
Cooper-Saeed waves refer to donor heart conducted P waves on the 12-lead ECG tracing of heart transplant recipients, also demonstrating nonconducted P waves of the recipient heart.
Cox maze procedure
The Cox maze procedure is a type of heart surgery for atrial fibrillation.
The Cox maze procedure is a type of heart surgery for atrial fibrillation.
Defibrillation
Defibrillation is a common treatment for life-threatening cardiac dysrhythmias, ventricular fibrillation, and pulseless ventricular tachycardia.
Defibrillation is a common treatment for life-threatening cardiac dysrhythmias, ventricular fibrillation, and pulseless ventricular tachycardia.
Ectopic beat
Ectopic beat (or cardiac ectopy) is a disturbance of the cardiac rhythm frequently related to the electrical conduction system of the heart, in which beats arise from fiber or group of fib...
Ectopic beat (or cardiac ectopy) is a disturbance of the cardiac rhythm frequently related to the electrical conduction system of the heart, in which beats arise from fiber or group of fib...
Ectopic focus
An ectopic pacemaker or ectopic focus is an excitable group of cells that causes a premature heart beat outside the normally functioning SA node of the human heart.
An ectopic pacemaker or ectopic focus is an excitable group of cells that causes a premature heart beat outside the normally functioning SA node of the human heart.
Ectopic pacemaker
An ectopic pacemaker or ectopic focus is an excitable group of cells that causes a premature heart beat outside the normally functioning SA node of the human heart.
An ectopic pacemaker or ectopic focus is an excitable group of cells that causes a premature heart beat outside the normally functioning SA node of the human heart.
Electrocardiogram technician
An electrocardiogram technician (also known as cardiographic technician, ECG tech or EKG tech) is a member of the health care team whose primary duty is the performance of elec...
An electrocardiogram technician (also known as cardiographic technician, ECG tech or EKG tech) is a member of the health care team whose primary duty is the performance of elec...
Electrocardiography
Electrocardiography (ECG or EKG from the German Elektrokardiogramm) is a transthoracic (across the thorax or chest) interpretation of the electrical activity of the heart over a ...
Electrocardiography (ECG or EKG from the German Elektrokardiogramm) is a transthoracic (across the thorax or chest) interpretation of the electrical activity of the heart over a ...
Electrocardiography in myocardial infarction
Electrocardiography in suspected myocardial infarction has the main purpose of detecting ischemia or acute coronary injury in emergency department populations coming for symptoms of myocardial i...
Electrocardiography in suspected myocardial infarction has the main purpose of detecting ischemia or acute coronary injury in emergency department populations coming for symptoms of myocardial i...
Electrophysiology study
An electrophysiology study (EP test or EP study) is a minimally invasive procedure which tests the electrical conduction system of the heart to assess the electrical activity and conductio...
An electrophysiology study (EP test or EP study) is a minimally invasive procedure which tests the electrical conduction system of the heart to assess the electrical activity and conductio...
First-degree atrioventricular block
First-degree AV block, or PR prolongation, is a disease of the electrical conduction system of the heart in which the PR interval is lengthened beyond 0.20 seconds.
First-degree AV block, or PR prolongation, is a disease of the electrical conduction system of the heart in which the PR interval is lengthened beyond 0.20 seconds.
Funny current
Funny current (or funny channel, or If, or IKf, or pacemaker current) refers to a specific current in the heart.
Funny current (or funny channel, or If, or IKf, or pacemaker current) refers to a specific current in the heart.
Heart block
A heart block is a disease in the electrical system of the heart.
A heart block is a disease in the electrical system of the heart.
Heart rate turbulence
Heart rate turbulence (HRT) is the return to equilibrium of heart rate after a premature ventricular contraction (PVC).
Heart rate turbulence (HRT) is the return to equilibrium of heart rate after a premature ventricular contraction (PVC).
Heart Rhythm Society
The Heart Rhythm Society (HRS) is an international non-profit organization that promotes education and advocacy for cardiac arrhythmia professionals and patients.
The Heart Rhythm Society (HRS) is an international non-profit organization that promotes education and advocacy for cardiac arrhythmia professionals and patients.
Heartbeat International (charity)
Heartbeat International is a non-profit organization which is based in Tampa, Florida.
Heartbeat International is a non-profit organization which is based in Tampa, Florida.
Idioventricular rhythm
In accelerated idioventricular rhythm, the rate of cardiac contraction is determined by the intrinsic rate of depolarisation of the cardiac cells.
In accelerated idioventricular rhythm, the rate of cardiac contraction is determined by the intrinsic rate of depolarisation of the cardiac cells.
Implantable cardioverter-defibrillator
An implantable cardioverter-defibrillator (ICD) is a small battery-powered electrical impulse generator which is implanted in patients who are at risk of sudden cardiac death due to ventri...
An implantable cardioverter-defibrillator (ICD) is a small battery-powered electrical impulse generator which is implanted in patients who are at risk of sudden cardiac death due to ventri...
Implanted cardiac resynchronization device
An implanted cardiac resynchronization device (ICR) is a medical device used in cardiac resynchronization therapy (CRT).
An implanted cardiac resynchronization device (ICR) is a medical device used in cardiac resynchronization therapy (CRT).
Inappropriate sinus tachycardia
Inappropriate Sinus Tachycardia (IST) is an uncommon type of cardiac arrhythmia, within the category of supraventricular tachycardia (SVT).
Inappropriate Sinus Tachycardia (IST) is an uncommon type of cardiac arrhythmia, within the category of supraventricular tachycardia (SVT).
Intraventricular block
A intraventricular block is a heart block of the ventricles of the heart.
A intraventricular block is a heart block of the ventricles of the heart.
Intrinsicoid deflection
Diagnostic significance: In the presence of bundle branch block or ventricular hypertrophy, the depolarization impulse takes a longer than normal period of time to reach the recording electrode.
Diagnostic significance: In the presence of bundle branch block or ventricular hypertrophy, the depolarization impulse takes a longer than normal period of time to reach the recording electrode.
Jervell and Lange-Nielsen syndrome
Jervell and Lange-Nielsen syndrome, a type of long QT syndrome, causes the cardiac muscle to take longer than usual to recharge between beats.
Jervell and Lange-Nielsen syndrome, a type of long QT syndrome, causes the cardiac muscle to take longer than usual to recharge between beats.
Junctional ectopic tachycardia
Junctional ectopic tachycardia is a form of junctional tachycardia due to irregular conduction from or through the atrioventricular node (AV node).
Junctional ectopic tachycardia is a form of junctional tachycardia due to irregular conduction from or through the atrioventricular node (AV node).
Junctional escape beat
A junctional escape beat is a delayed heartbeat originating not from the atrium but from an ectopic focus somewhere in the AV junction.
A junctional escape beat is a delayed heartbeat originating not from the atrium but from an ectopic focus somewhere in the AV junction.
Junctional rhythm
Junctional rhythm describes an abnormal heart rhythm resulting from impulses coming from a locus of tissue in the area of the atrioventricular node, the "junction" between atria and ventricles.
Junctional rhythm describes an abnormal heart rhythm resulting from impulses coming from a locus of tissue in the area of the atrioventricular node, the "junction" between atria and ventricles.
Junctional tachycardia
Junctional tachycardia is a form of supraventricular tachycardia characterized by involvement of the AV node.
Junctional tachycardia is a form of supraventricular tachycardia characterized by involvement of the AV node.
Left anterior fascicular block
Left anterior fascicular block is a cardiac condition, distinguished from left bundle branch block.
Left anterior fascicular block is a cardiac condition, distinguished from left bundle branch block.
Left axis deviation
Left axis deviation is a condition where the QRS complex is positive in lead I, but negative in lead II. Left axis deviation is also described as an ECG with the mean electrical axis from -30° t...
Left axis deviation is a condition where the QRS complex is positive in lead I, but negative in lead II. Left axis deviation is also described as an ECG with the mean electrical axis from -30° t...
Left bundle branch block
Left bundle branch block (LBBB) is a cardiac conduction abnormality seen on the electrocardiogram (ECG).
Left bundle branch block (LBBB) is a cardiac conduction abnormality seen on the electrocardiogram (ECG).
Left posterior fascicular block
A left posterior fascicular block is a condition where the left posterior fascicle, i.e. the backside part of the left cardiac bundle, does not conduct the electrical impulses from the atriovent...
A left posterior fascicular block is a condition where the left posterior fascicle, i.e. the backside part of the left cardiac bundle, does not conduct the electrical impulses from the atriovent...
Leonardo Krys
Leonardo Krys was a travel agent whose 1991 heart attack aboard a Lufthansa flight prompted U.S. based airlines to install Automated External Defibrillators, or AED, on their planes.
Leonardo Krys was a travel agent whose 1991 heart attack aboard a Lufthansa flight prompted U.S. based airlines to install Automated External Defibrillators, or AED, on their planes.
Lev's disease
Lev's disease (or Lenegre-Lev syndrome) is an acquired complete heart block due to idiopathic fibrosis and calcification of the electrical conduction system of the heart.
Lev's disease (or Lenegre-Lev syndrome) is an acquired complete heart block due to idiopathic fibrosis and calcification of the electrical conduction system of the heart.
Lewis lead
A Lewis Lead is a modified EKG lead used to detect atrial flutter waves when atrial flutter is suspected clinically but not definitely demonstrated on the standard 12 lead EKG. In order to creat...
A Lewis Lead is a modified EKG lead used to detect atrial flutter waves when atrial flutter is suspected clinically but not definitely demonstrated on the standard 12 lead EKG. In order to creat...
Libin Cardiovascular Institute of Alberta
The Libin Cardiovascular Institute of Alberta is a partnership between the Calgary Health Region and the University of Calgary.
The Libin Cardiovascular Institute of Alberta is a partnership between the Calgary Health Region and the University of Calgary.
Long QT syndrome
The long QT syndrome is a rare inborn heart condition in which delayed repolarization of the heart following a heartbeat increases the risk of episodes of torsade de pointes.
The long QT syndrome is a rare inborn heart condition in which delayed repolarization of the heart following a heartbeat increases the risk of episodes of torsade de pointes.
Lown–Ganong–Levine syndrome
Lown–Ganong–Levine syndrome (LGL) is a syndrome of pre-excitation of the ventricles due to an accessory pathway providing an abnormal electrical communication from the atria to the ventricles.
Lown–Ganong–Levine syndrome (LGL) is a syndrome of pre-excitation of the ventricles due to an accessory pathway providing an abnormal electrical communication from the atria to the ventricles.
Macroshock
Macroshock (mak´ro-shok″) is a medical term for the effects of body exposition to electrical current, which can lead to electrocution and death.
Macroshock (mak´ro-shok″) is a medical term for the effects of body exposition to electrical current, which can lead to electrocution and death.
Management of atrial fibrillation
The main goals in the management of atrial fibrillation are to prevent temporary circulatory instability and to prevent stroke.
The main goals in the management of atrial fibrillation are to prevent temporary circulatory instability and to prevent stroke.
Microshock
Microshock is a risk in patients with intracardiac electrical conductors, such as external pacemaker electrodes, saline filled catheters, or weak or old heart tissue within the heart.
Microshock is a risk in patients with intracardiac electrical conductors, such as external pacemaker electrodes, saline filled catheters, or weak or old heart tissue within the heart.
Minimaze procedure
The mini-maze procedures are cardiac surgery procedures intended to cure atrial fibrillation, a common disturbance of heart rhythm.
The mini-maze procedures are cardiac surgery procedures intended to cure atrial fibrillation, a common disturbance of heart rhythm.
Multifocal atrial tachycardia
Multifocal atrial tachycardia (MAT) is a cardiac arrhythmia, specifically a type of supraventricular tachycardia.
Multifocal atrial tachycardia (MAT) is a cardiac arrhythmia, specifically a type of supraventricular tachycardia.
Multifunction cardiogram
Multifunction CardioGramTM (MCGTM) is an FDA and AMA approved diagnostic tool used to diagnose myocardial ischemia due to Coronary Artery Disease (CAD).
Multifunction CardioGramTM (MCGTM) is an FDA and AMA approved diagnostic tool used to diagnose myocardial ischemia due to Coronary Artery Disease (CAD).
Numbering aberrant rhythms
Bigeminy is a descriptor for a heart arrhythmia in which abnormal heart beats occur every other concurrent beat.
Bigeminy is a descriptor for a heart arrhythmia in which abnormal heart beats occur every other concurrent beat.
P wave (electrocardiography)
This turns into the P wave on the ECG.
This turns into the P wave on the ECG.
Pacemaker action potential
A pacemaker action potential is the kind of action potential that provides a reference rhythm for the network.
A pacemaker action potential is the kind of action potential that provides a reference rhythm for the network.
Pacemaker crosstalk
Pacemaker crosstalk results when pacemaker generated electrical event in one chamber is sensed by the lead in another chamber, resulting in inappropriate inhibition of pacing artifact in the sec...
Pacemaker crosstalk results when pacemaker generated electrical event in one chamber is sensed by the lead in another chamber, resulting in inappropriate inhibition of pacing artifact in the sec...
Pacemaker failure
Pacemaker failure is the inability of an implanted artificial pacemaker to perform its intended function of regulating the beating of the heart.
Pacemaker failure is the inability of an implanted artificial pacemaker to perform its intended function of regulating the beating of the heart.
Pacemaker potential
In the pacemaking cells of the heart, the pacemaker potential is the slow, positive increase in voltage across the cell's membrane that occurs between the end of one action potential and the beg...
In the pacemaking cells of the heart, the pacemaker potential is the slow, positive increase in voltage across the cell's membrane that occurs between the end of one action potential and the beg...
Pacemaker syndrome
Pacemaker syndrome is a disease that represents the clinical consequences of suboptimal atrioventricular (AV) synchrony or AV dyssynchrony, regardless of the pacing mode, after the pacemaker pla...
Pacemaker syndrome is a disease that represents the clinical consequences of suboptimal atrioventricular (AV) synchrony or AV dyssynchrony, regardless of the pacing mode, after the pacemaker pla...
PR interval
The PR interval is measured from the beginning of the P wave to the beginning of the QRS complex.
The PR interval is measured from the beginning of the P wave to the beginning of the QRS complex.
Premature atrial contraction
Premature atrial contractions (PACs), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a common cardiac arrhythmia characterized by premature heart...
Premature atrial contractions (PACs), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a common cardiac arrhythmia characterized by premature heart...
Premature ventricular contraction
A Premature Ventricular Contraction (PVC), also known as a premature ventricular complex, ventricular premature contraction (or complex or complexes) (VPC), ventricular premature ...
A Premature Ventricular Contraction (PVC), also known as a premature ventricular complex, ventricular premature contraction (or complex or complexes) (VPC), ventricular premature ...
Primary ventricular fibrillation
Primary ventricular fibrillation is an unpredictable and potentially fatal arrhythmia occurring during the acute phase of a myocardial infarction leading to immediate collapse and, if left untr...
Primary ventricular fibrillation is an unpredictable and potentially fatal arrhythmia occurring during the acute phase of a myocardial infarction leading to immediate collapse and, if left untr...
Pulseless electrical activity
Pulseless electrical activity or PEA refers a cardiac arrest situation in which a heart rhythm is observed on the electrocardiogram that should be producing a pulse, but is not.
Pulseless electrical activity or PEA refers a cardiac arrest situation in which a heart rhythm is observed on the electrocardiogram that should be producing a pulse, but is not.
Purkinje fibers
Purkinje fibersPurkinje fibersPurkinje fibers are located in the inner ventricular walls of the heart, just beneath the endocardium.
Purkinje fibersPurkinje fibersPurkinje fibers are located in the inner ventricular walls of the heart, just beneath the endocardium.
QRS complex
The QRS complex is a name for the combination of three of the graphical deflections seen on a typical electrocardiogram.
The QRS complex is a name for the combination of three of the graphical deflections seen on a typical electrocardiogram.
QT interval
In cardiology, the QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle.
In cardiology, the QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle.
Quatrefoil reentry
Quatrefoil reentry is a type of cardiac arrhythmia that consists of two adjacent figure-of-eight reentrant circuits.
Quatrefoil reentry is a type of cardiac arrhythmia that consists of two adjacent figure-of-eight reentrant circuits.
Refractory period (physiology)
In physiology, a refractory period is a period of time during which an organ or cell is incapable of repeating a particular action, or the amount of time it takes for an excitable membrane to be...
In physiology, a refractory period is a period of time during which an organ or cell is incapable of repeating a particular action, or the amount of time it takes for an excitable membrane to be...
Respiratory sinus arrhythmia
Respiratory sinus arrhythmia (RSA) is a naturally occurring variation in heart rate that occurs during a breathing cycle.
Respiratory sinus arrhythmia (RSA) is a naturally occurring variation in heart rate that occurs during a breathing cycle.
Right axis deviation
Right Axis Deviation (RAD) is a congenital heart condition wherein the electrical conduction of the heart is greater than +105 degrees.
Right Axis Deviation (RAD) is a congenital heart condition wherein the electrical conduction of the heart is greater than +105 degrees.
Right bundle branch block
A right bundle branch block (RBBB) is a defect in the heart's electrical conduction system.
A right bundle branch block (RBBB) is a defect in the heart's electrical conduction system.
Romano-Ward syndrome
Romano-Ward syndrome, is the major variant of long QT syndrome.
Romano-Ward syndrome, is the major variant of long QT syndrome.
Ross Cowie
Ross Cowie (born 13 February 1960) is former shinty player and manager from Portree, Isle of Skye, Scotland.
Ross Cowie (born 13 February 1960) is former shinty player and manager from Portree, Isle of Skye, Scotland.
Second-degree atrioventricular block
Second-degree AV block is a disease of the electrical conduction system of the heart.
Second-degree AV block is a disease of the electrical conduction system of the heart.
Short QT syndrome
Short QT syndrome is a genetic disease of the electrical system of the heart.
Short QT syndrome is a genetic disease of the electrical system of the heart.
Sick sinus syndrome
Sick sinus syndrome, also called sinus node dysfunction, is a group of abnormal heart rhythms presumably caused by a malfunction of the sinus node, the heart's primary pacemaker.
Sick sinus syndrome, also called sinus node dysfunction, is a group of abnormal heart rhythms presumably caused by a malfunction of the sinus node, the heart's primary pacemaker.
Signal-averaged electrocardiogram
Signal-averaged electrocardiography (SAECG) is a special electrocardiographic technique, in which multiple electric signals from the heart are averaged to remove interference and reveal small va...
Signal-averaged electrocardiography (SAECG) is a special electrocardiographic technique, in which multiple electric signals from the heart are averaged to remove interference and reveal small va...
Sinoventricular conduction
Sinoventricular conduction is a rare form of cardiac conduction in which the sinoatrial node generates an impulse that is conducted to the atrioventricular node in the absence of atrial contraction.
Sinoventricular conduction is a rare form of cardiac conduction in which the sinoatrial node generates an impulse that is conducted to the atrioventricular node in the absence of atrial contraction.
Sinus bradycardia
Sinus bradycardia is a heart rhythm that originates from the sinus node and has a rate of under 60 beats per minute.
Sinus bradycardia is a heart rhythm that originates from the sinus node and has a rate of under 60 beats per minute.
Sinus tachycardia
Sinus tachycardia (also colloquially known as sinus tach or sinus tachy) is a heart rhythm with elevated rate of impulses originating from the sinoatrial node, defined as a rate grea...
Sinus tachycardia (also colloquially known as sinus tach or sinus tachy) is a heart rhythm with elevated rate of impulses originating from the sinoatrial node, defined as a rate grea...
ST segment
The ST segment connects the QRS complex and the T wave and has a duration of 0.08 to 0.12 sec (80 to 120 ms).
The ST segment connects the QRS complex and the T wave and has a duration of 0.08 to 0.12 sec (80 to 120 ms).
Supraventricular extrasystole
A supraventricular extrasystole (SVES) is an extrasystole or premature electrical impulse in the heart, generated above the level of the ventricle.
A supraventricular extrasystole (SVES) is an extrasystole or premature electrical impulse in the heart, generated above the level of the ventricle.
Supraventricular tachycardia
Supraventricular tachycardia (SVT) is any tachycardic rhythm originating above the ventricular tissue.
Supraventricular tachycardia (SVT) is any tachycardic rhythm originating above the ventricular tissue.
T wave
In electrocardiography, the T wave represents the repolarization of the ventricles.
In electrocardiography, the T wave represents the repolarization of the ventricles.
Third-degree atrioventricular block
Third-degree AV block, also known as complete heart block, is a medical condition in which the impulse generated in the SA node in the atrium does not propagate to the ventricles.
Third-degree AV block, also known as complete heart block, is a medical condition in which the impulse generated in the SA node in the atrium does not propagate to the ventricles.
Torsades de pointes
Torsades de pointes, or simply torsades is a French term that literally means "twisting of the points".
Torsades de pointes, or simply torsades is a French term that literally means "twisting of the points".
Transcutaneous pacing
Transcutaneous pacing is a temporary means of pacing a patient's heart during a medical emergency.
Transcutaneous pacing is a temporary means of pacing a patient's heart during a medical emergency.
Transvenous pacing
Transvenous cardiac pacing, also called endocardial pacing, is a potentially life saving intervention used primarily to correct profound bradycardia.
Transvenous cardiac pacing, also called endocardial pacing, is a potentially life saving intervention used primarily to correct profound bradycardia.
Trifascicular block
Trifascicular block is a problem with the electrical conduction of the heart.
Trifascicular block is a problem with the electrical conduction of the heart.
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than...
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than...
Wandering pacemaker
In cardiology, a wandering pacemaker is an atrial arrhythmia that occurs when the natural cardiac pacemaker site shifts between the SA node, the atria, and/or the AV node.
In cardiology, a wandering pacemaker is an atrial arrhythmia that occurs when the natural cardiac pacemaker site shifts between the SA node, the atria, and/or the AV node.
Wellens' syndrome
Wellens' syndrome is an electrocardiographic manifestation of critical proximal left anterior descending coronary artery stenosis in patients with unstable angina.
Wellens' syndrome is an electrocardiographic manifestation of critical proximal left anterior descending coronary artery stenosis in patients with unstable angina.
Wolff-Parkinson–White syndrome
Wolff–Parkinson–White syndrome is a syndrome of pre-excitation of ventricles of the heart due to an accessory pathway known as the bundle of Kent.
Wolff–Parkinson–White syndrome is a syndrome of pre-excitation of ventricles of the heart due to an accessory pathway known as the bundle of Kent.
Wolff–Parkinson–White syndrome
Wolff–Parkinson–White syndrome (WPW) is a syndrome of pre-excitation of ventricles of the heart due to an accessory pathway known as the bundle of Kent.
Wolff–Parkinson–White syndrome (WPW) is a syndrome of pre-excitation of ventricles of the heart due to an accessory pathway known as the bundle of Kent.