Cardiac Flashcards
1
Q
Which of the 4 diastolic phases contributes the most blood volume to LV?
A
Early rapid filling (driven by pressure gradient)
Other phases:
Isovolumetric: no change in volume
Late filling: 5%
Atrial kick: 15-20%
2
Q
To ensure accuracy, angle between flow and doppler probe should be less than what?
A
20%
angle of 0 is 100% (cosine 0)
3
Q
R wave signifies what?
A
End of diastole, closing of MV and LV isovolumetric contraction begins (pressure building until forces AV open-> systole)
4
Q
Aortic valve closes where in the EKG cycle?
A
End of T wave repolarization
