Mean circulatory filling pressure is

When hea pumping is stopped by shocking the hea with electricity to cause ventricular fibrillation or is stopped in any other way, flow of blood anywhere in circulation ceases a few seconds later. Without blood flow the pressure everywhere in circulation become equal. This equilibrated pressure level is called mean circulatory filling pressureRef: Guyton and Hall, Textbook of medical physiology, 2ndSouth Asia Edition