What is diastolic blood pressure?

• A. The pressure in arteries during heart contraction
• B. The pressure in arteries when the heart is resting
• C. The lowest blood pressure recorded
• D. The average blood pressure during cardiac cycles

Answer: (B)

Diastolic blood pressure refers specifically to the pressure in the arteries when the heart is at rest, filling with blood between beats. This phase, known as diastole, occurs after the heart has contracted and pushed blood into the arteries through a process called systole. During diastole, the heart's chambers refill with blood, and the arteries experience the minimum pressure necessary to maintain blood flow throughout the body.

Understanding diastolic blood pressure is crucial, as it provides insight into vascular health and the heart's function during rest periods. Maintaining an appropriate diastolic pressure is essential for ensuring adequate perfusion of tissues and organs. Factors affecting diastolic pressure include vascular resistance and the overall volume of blood in circulation. Recognizing this concept helps assess cardiovascular conditions and manage blood pressure effectively.