Blood velocities in arteries are higher during systole than during diastole. These two phases are commonly understood as systole and diastole. An imaging technique that subtracts two fast spin echo sequences acquired at systole and diastole. It is widely assumed that reflections are minimal during late diastole and early systole. The timing of the pumping procedure can be divided into two parts&colon; diastole and systole. This relaxation of the left ventricle (early ventricular diastole) causes a fall in its pressure. During diastole, the ventricles relax and fill with blood again. Normally, mitral valve is about 5 cm during diastole. This change in repolarization inhibits the heart from relaxing and properly entering diastole. This is undertaken because perturbations in diastole are exaggerated during the increased demands of exercise. Systole is represented by the "sin" function, while flow during diastole is zero.