en.wikipedia.org
en.wikipedia.org
osmosis.org
sciencedirect.com
ncbi.nlm.nih.gov
National Center for Biotechnology Information
https://www.ncbi.nlm.nih.gov › books › NBK54082
ncbi.nlm.nih.gov
National Center for Biotechnology Information
https://www.ncbi.nlm.nih.gov › books › NBK54078
cvphysiology.com
CV Physiology
https://cvphysiology.com › cardiac-function › cf010
litfl.com
Life in the Fast Lane
https://litfl.com › contractility
pmc.ncbi.nlm.nih.gov
pmc.ncbi.nlm.nih.gov
https://pmc.ncbi.nlm.nih.gov › articles › PMC3303572
pmc.ncbi.nlm.nih.gov
pmc.ncbi.nlm.nih.gov
https://pmc.ncbi.nlm.nih.gov › articles › PMC7137917
pathophys.org
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