It takes "heart" to win: what makes the heart powerful?
The pumping action of the heart varies considerably on a beat-to-beat basis and is ultimately determined by the extent of ventricular myocyte shortening during systole. The use of isolated myocardial preparations has provided new insights about the subcellular factors that modulate power output of the ventricles.
McDonald
Kerry S
KS
Department of Physiology, University of Missouri, Columbia, Missouri 65212, USA.
Herron
Todd J
TJ
D000818:Animals; D002118:Calcium / Q000502:physiology; D006321:Heart / Q000502:physiology*; D006801:Humans; D009124:Muscle Proteins / Q000502:physiology; D009200:Myocardial Contraction / Q000502:physiology; D009206:Myocardium / Q000166:cytology; D009210:Myofibrils / Q000502:physiology; D018995:Myosin Heavy Chains / Q000502:physiology
D009124:Muscle Proteins; D018995:Myosin Heavy Chains; D002118:Calcium