What is the typical effect of ACE inhibitors and ARBs on resting and exercise blood pressure with respect to heart rate response?

What is the typical effect of ACE inhibitors and ARBs on resting and exercise blood pressure with respect to heart rate response?

• A. Lower resting and exercise blood pressure with preserved heart rate response.
• B. Increase resting blood pressure.
• C. No change in blood pressure.
• D. Increase exercise blood pressure.

Answer: (A)

ACE inhibitors and ARBs lower blood pressure by reducing vascular resistance and circulating volume, without dampening the autonomic signals that drive heart rate up during activity. By blocking the renin–angiotensin system—ACE inhibitors by lowering angiotensin II and aldosterone, ARBs by blocking angiotensin II receptors—these drugs cause vasodilation and, with some reduction in circulating volume, lower resting blood pressure. During exercise, the body normally increases heart rate to meet higher oxygen demand, and these medications do not interfere with that heart-rate response because they don’t block beta-adrenergic stimulation or the sinoatrial node. The result is lower blood pressure both at rest and with exercise, while heart rate increases normally. The other options describe scenarios that don’t align with how these drugs work—raising blood pressure, no change in blood pressure, or increasing exercise blood pressure—so they’re not consistent with the typical effects of ACE inhibitors and ARBs.

ACE inhibitors and ARBs lower blood pressure by reducing vascular resistance and circulating volume, without dampening the autonomic signals that drive heart rate up during activity. By blocking the renin–angiotensin system—ACE inhibitors by lowering angiotensin II and aldosterone, ARBs by blocking angiotensin II receptors—these drugs cause vasodilation and, with some reduction in circulating volume, lower resting blood pressure. During exercise, the body normally increases heart rate to meet higher oxygen demand, and these medications do not interfere with that heart-rate response because they don’t block beta-adrenergic stimulation or the sinoatrial node. The result is lower blood pressure both at rest and with exercise, while heart rate increases normally. The other options describe scenarios that don’t align with how these drugs work—raising blood pressure, no change in blood pressure, or increasing exercise blood pressure—so they’re not consistent with the typical effects of ACE inhibitors and ARBs.