Khan Academy Static

The pressure volume loop is one of the classic figures that helps us to conceptualize and understand the mechanics of the left ventricle of the heart. In addition to a filling up with blood and squeezing out blood there is a (very short) period of time when the heart muscle is contracting and relaxing with no volume change! As the left ventricle moves around the PV loop with each lub dub you get a sense for the amazing amount of work it does as pressures and volumes go up and down, all day, every day. This is a fascinating area where physics and biology meet to produce something miraculous.

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10945_Pressure_in_the_left_heart_part_1.html

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10951_Understanding_the_pressure_volume_loop.html

10955_What_is_preload_.html

10952_End_diastolic_pressure_volume_relationship_EDPVR_.html

10956_Why_doesn_t_the_heart_rip_.html

10949_Left_ventricular_volume_vs_time.html

10950_Drawing_a_pressure_volume_loop.html

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10954_Reimagine_the_pressure_volume_relationship.html

10953_End_systolic_pressure_volume_relationship_ESPVR_.html