Which term describes the arterial pressure during the heart's contraction?

• A. Diastolic pressure
• B. Pulse pressure
• C. Mean arterial pressure
• D. Systolic blood pressure

Answer: (D)

During contraction, the heart squeezes blood into the arteries, pushing the arterial pressure up to its peak. This peak pressure is called systolic blood pressure. It reflects the force generated as the ventricles eject blood during the heartbeat. In contrast, diastolic pressure is the lower pressure reached when the heart relaxes between beats. Pulse pressure is simply the difference between systolic and diastolic pressures, and mean arterial pressure is an average pressure in the arteries over the cardiac cycle. So, the pressure during the heart’s contraction is systolic blood pressure.