Precarga y poscarga

¿Por qué no se desgarra el corazón?

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 Academy.

¿Qué es la precarga?

Algunos dicen que precarga = presión diastólica final, otros dicen precarga = volumen telediastólico, ¿cuál es? ¡Ve y descubre! Rishi es un médico de enfermedades infecciosas pediátricas y trabaja en Khan Academy.

Preload and Pressure

Find out how left ventricular end-diastolic pressure helps you make an educated guess about preload. Rishi is a pediatric infectious disease physician and works at Khan Academy.

Preload Stretches out the Heart Cells

Find out why stretching a heart cell in diastole affects how forcefully it contracts in systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.

Frank-Starling Mechanism

Carefully follow 5 different preload scenarios to see how each one will have a different effect on how actin and myosin line up. Rishi is a pediatric infectious disease physician and works at Khan Academy.

Relación longitud-tensión del sarcómero

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.

Contracción activa vs retroceso pasivo

Go through the similarities and differences between the sarcomere and a slingshot! Rishi is a pediatric infectious disease physician and works at Khan Academy.

¿Qué es la poscarga?

Rishi es un médico de enfermedades infecciosas pediátricas y trabaja en Khan Academy.

Increasing the Heart's Force of Contraction

Find out exactly how stretch increases force of contraction in end-diastole, whereas more calcium increased force of contraction in end-systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.