Khan Academy
Khan Academy: Pressure Volume Loops: Why Doesn't the Heart Rip?
Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the "wall stress" in the left ventricle to answer the question of why the heart never gets a rip or tear. Rishi is a pediatric infectious...
Khan Academy
Khan Academy: Changing the Pv Loop: Arterial Elastance (Ea) and Afterload
First, learn the difference between arterial elastance (EA) and afterload. Then, understand how EA is affected by changes in afterload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works...
Khan Academy
Khan Academy: Preload and Afterload: What Is Afterload?
A video exploring the definition of preload and afterload as it relates to the study of the heart. Understand that preload is the stretch of the heart at the beginning of systole while afterload is the squeeze at the end of systole. [10:27]
Khan Academy
Khan Academy: Why Doesn't the Heart Rip?
This video will help you understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the 'wall stress' in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan...