7. Cardiac Cycle and Sounds Flashcards
1
Q
What is the range for ventricular volume?
A
120 to ~50ml
2
Q
What do we call the sudden uptick in aortic pressure when the aortic valve closes?
A
The dicrotic notch
3
Q
What on the EKG is happening as the dicrotic notch is happening?
A
The T wave is winding down
4
Q
Where does the period of isovolumetric relaxation fall on the EKG?
A
Just after the T wave
5
Q
Why does the aortic pressure drop a while after the ventricle contracts?
A
Because of peripheral runoff (blood entering the peripheral tissues)
6
Q
Why does jugular pressure increase just after the P wave?
A
Because the atria contract and squeeze the jugular.
7
Q
When is the peak in ventricular pressure relative to the EKG?
A
Just before the T wave
