Definition for Ventricular filling
From Biology Forums Dictionary
Ventricular filling is when the ventricular expand and the pressure falls below that of the atria. This leads to the Atrio-Ventricular (AV) valves to open and blood rushes into the ventricles. The ventricular pressure rises and the atrial pressure falls. This ventricular filling occurs in three phases:
- Rapid Ventricular filling
- Diastasis - slow filling (P wave on ECG occurs at end of this slow filling).
- Atrial Systole - Contraction of the atrium. The right atrium contracts slightly before the left atrium.
As the ventricles fill, the valve leaflets move to the closed position.
The End Diastolic Volume = 130 ml, where as only 40 ml is contributed by the atrial systol.