Frank-Starling Mechanism Flashcards
1
Q
Afterload of the Heart
A
Aortic pressure
2
Q
An increase in Pre-Load will increase Stroke Volume (and consequently, Cardiac Output) with certain physiologic limits
Due to maximum degree of overlap between actin and myosin
Due to reduction of space between thick and thin filaments or interfilament spacing
A
FRANK-STARLING MECHANISM
3
Q
LV EDV is directly proportional to what?
A
Venous return
Right atrial pressure
4
Q
What happens when Pre-load increases?
A
Stroke Volume & Cardiac Output: INCREASES
5
Q
What happens when Afterload increases?
A
Strove Volume & Cardiac Output: DECREASES
Velocity of Sarcomere Shortening: DECREASES
6
Q
Pre-Load of the Heart
A
LVEDV
LEFT VENTRICULAR END-DIASTOLIC VOLUME
