Heart:
Once the AV valves open, blood that has accumulated in the atria flows rapidly into the ventricles.
Pressures & Volume:
Ventricular volume (white) increases rapidly as blood flows from the atria into the ventricles.
ECG:
Heart sounds:
A third heart sound (S3) is usually abnormal and is due to rapid passive ventricular filling. It occurs in dilated congestive heart failure, severe hypertension, myocardial infarction, or mitral incompetence.
