How does aging affect afterload?

How does aging affect afterload?

• A. It decreases afterload
• B. It increases afterload due to atherosclerosis
• C. It has no effect on afterload
• D. It fluctuates with seasons

Answer: (B)

Afterload is the pressure the ventricle must overcome to eject blood, mainly set by systemic vascular resistance and the stiffness (compliance) of the arteries. As we age, arteries undergo structural changes—elastin is lost, collagen becomes more prominent, and calcification plus atherosclerotic plaques build up—making the arterial system stiffer. This reduced compliance raises the pressure the heart has to pump against during systole, so afterload increases. That’s why aging is associated with higher afterload and can contribute to changes like left ventricular hypertrophy over time. The idea that afterload would decrease, or that aging would have no effect or only seasonal fluctuations, doesn’t fit how arterial stiffness and plaque accumulation affect the pressure the heart must generate.

Afterload is the pressure the ventricle must overcome to eject blood, mainly set by systemic vascular resistance and the stiffness (compliance) of the arteries. As we age, arteries undergo structural changes—elastin is lost, collagen becomes more prominent, and calcification plus atherosclerotic plaques build up—making the arterial system stiffer. This reduced compliance raises the pressure the heart has to pump against during systole, so afterload increases. That’s why aging is associated with higher afterload and can contribute to changes like left ventricular hypertrophy over time. The idea that afterload would decrease, or that aging would have no effect or only seasonal fluctuations, doesn’t fit how arterial stiffness and plaque accumulation affect the pressure the heart must generate.