Khan Academy Static

Once you’ve learned about the PV loop, a natural question arises - Does it ever change shape? It turns out that there are precisely three things that can change the shape of the loop: 1. Preload, 2. Afterload, and 3. Contractility. That’s it! The tricky part comes when you try to change one and you realize that the body begins to change the other two as well as a natural consequence. In order to simplify, you’ll find that PV loops are sometimes even described as PV boxes. You’ll get to learn about PV loops, PV boxes, and even play around with them yourself in this tutorial!

15967_Arterial_elastance_Ea_and_preload.html

15965_Getting_Ea_arterial_elastance_from_the_PV_loop.html

15969_Contractility_Ea_and_preload_effects_on_PV_boxes.html

15962_Increasing_the_heart_s_force_of_contraction.html

15966_Arterial_elastance_Ea_and_afterload.html

15960_What_is_preload_.html

15968_Stroke_work_in_PV_loops_and_boxes.html

15964_What_is_contractility_.html

15963_Reimagine_the_pressure_volume_relationship.html

15961_What_is_afterload_.html