systolic

systolic Referring to the time at which ventricular contraction occurs, which is called systole. Systolic pressure is the maximum arterial pressure during contraction of the left ventricle of the heart. In a blood pressure reading, the systolic pressure is typically the first number recorded. For example, in a blood pressure of 120/80 (“120 over 80”), the systolic pressure is 120 (that is, 120 mm Hg [millimeters of mercury]). A systolic murmur is a heart murmur heard during systole. See also diastolic.