Cardiology

Question 1

Isometric contraction of the left ventricle occurs in which phase of the cardiac cycle?

Answer 1

1. Diastolic filling of LV
2. QRS
3. Isometric contraction with AV valve closure
4. Rapid rise in ventricular pressure
5. Arterial diastolic pressure exceeded by ventricular systolic pressure which leads to semilunar valve opening