Khan Academy
Khan Academy: Changing the Heart Rate: Chronotropic Effect
Find out exactly how your autonomic nervous system has a chronotropic effect (i.e. timing) that changes the speed of your heartbeat! Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:02]
Khan Academy
Khan Academy: Pressure Volume Loops: Understanding the Pressure Volume Loop
Figure out how all of those physiology terms - end-systolic, end-diastolic, pulse pressure, stroke volume, and ejection fraction - can be easily understood using the pressure-volume loop. Rishi is a pediatric infectious disease physician...
Khan Academy
Khan Academy: Pressure Volume Loops: Re Imagine the Pressure Volume Relationship
Understand what is happening at the cellular level to cause two identical left ventricular volumes to have such different pressures! Rishi is a pediatric infectious disease physician and works at Khan Academy.
Khan Academy
Khan Academy: Changing the Av Node Delay Chronotropic Effect
Find out exactly how your autonomic nervous system has a chronotropic effect (i.e. timing) that changes the delay between the contraction of the atria and the ventricles! Rishi is a pediatric infectious disease physician and works at...
Khan Academy
Khan Academy: Changing the Pv Loop: Getting Ea From the Pv Loop
Find out how to use the PV loop to draw the Ea (Arterial Elastance) line, and what it represents. Rishi is a pediatric infectious disease physician and works at Khan Academy. [11:21]
PBS
Pbs Learning Media: Crash Course Anatomy and Physiology: The Heart, Part 2: Heart Throbs
In this episode, we talk about the heart and heart throbs-both literal and those of the televised variety. We learn how your heart's pacemaker cells use leaky membranes to generate their own action potentials, and how the resulting...
Khan Academy
Khan Academy: Thinking About Heartbeats
Find out what happens when things move very slowly through the AV Node. Rishi is a pediatric infectious disease physician and works at Khan Academy.
Khan Academy
Khan Academy: Changing the Pv Loop: Stroke Work in Pv Loops and Boxes
Watch how PV loops can be "morphed" into PV boxes to make drawing them and thinking about them much simpler. Rishi is a pediatric infectious disease physician and works at Khan Academy.
Khan Academy
Khan Academy: Changing the Pv Loop: Arterial Elastance (Ea) and Preload
Understand how EA is affected by changes in preload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.
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: Pressure Volume Loops: Left Ventricular Volume vs. Time
Left ventricular volume changes over time in a way that makes a curious looking graph. Learn more in this video! Rishi is a pediatric infectious disease physician and works at Khan Academy.
Khan Academy
Khan Academy: New Topic: Reseting Cardiac Concentration Gradients
Watch as the heart cells use energy to reset the concentration gradients for all of the ions after the action potential has gone through. Rishi is a pediatric infectious disease physician and works at Khan Academy. [14:58]
Khan Academy
Khan Academy: Preload and Afterload: Sarcomere Length Tension Relationship
Find out why the length of a sarcomere (in diastole) affects the amount of force that it can generate (in systole), and how that would look on a graph. Rishi is a pediatric infectious disease physician and works at Khan Academy. [8:50]
Khan Academy
Khan Academy: Changing the Heart Rate: Chronotropic Effect
A video showing how your heartbeat can change speeds based on the chronotropic effect from your autonomic nervous system. [12:02]
Khan Academy
Khan Academy: Changing the Av Node Delay: Chronotropic Effect
"Find out exactly how your autonomic nervous system has a chronotropic effect that changes the delay between the contraction of the atria and the ventricles" in the video. [12:13]
Khan Academy
Khan Academy: What Is Preload?
Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy. [13:32]