Which statement best defines systolic blood pressure?

• A. Minimum arterial pressure during relaxation (ventricular diastole)
• B. Peak arterial pressure during heart contraction (ventricular systole)
• C. Difference between systolic and diastolic pressures
• D. Average arterial pressure over the cardiac cycle

Answer: (B)

Systolic blood pressure is the peak arterial pressure reached during the heart’s contraction as the ventricles eject blood into the aorta. This moment reflects how forcefully the heart contracts and how much blood is being pushed into the arteries. In contrast, diastolic pressure is the minimum arterial pressure during relaxation when the heart fills. The difference between systolic and diastolic pressures is the pulse pressure, which relates to arterial stiffness and stroke dynamics. The mean arterial pressure is the average pressure in the arteries over the cardiac cycle, often estimated as diastolic pressure plus a fraction of the pulse pressure.

The statement that best defines systolic blood pressure is the peak arterial pressure during heart contraction (ventricular systole) because it specifically describes the highest pressure the arteries reach during the heartbeat. The other descriptions refer to diastolic pressure, pulse pressure, or mean arterial pressure, which are different measures.