1. Preload: effect of stretchingFrank-Starling (F-S) law of the heart:
Within limits, the more the heart fills during diastole (preload – stretching), the greater the force of contraction during systole.
the preload is proportional to EDV, the greater the EDV, the more forcefull the next contraction
“The heart will pump what it receives”- Starling’s law of the heart