FISDAP Cardiology Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

When there is a decrease in cardiac output, the body initiates a variety of compensatory mechanisms to stabilize blood pressure and ensure adequate perfusion to vital organs. These mechanisms are essential for maintaining homeostasis in response to reduced blood flow.

Key compensatory responses include increased heart rate (tachycardia), enhanced vascular resistance (vasoconstriction), and the activation of neurohormonal systems such as the renin-angiotensin-aldosterone system. These adaptations collectively aim to optimize circulation and restore cardiac output. Additionally, the body may redistribute blood flow to prioritize vital systems, ensuring critical areas like the brain and heart receive the necessary oxygen and nutrients.

By employing such compensatory mechanisms, the body is effectively trying to counteract the effects of decreased cardiac output and maintain overall cardiovascular stability. This response is critical, as prolonged decreases in cardiac output can lead to tissue ischemia and organ failure if not addressed.

The other options do not accurately reflect how the body responds in this situation; for example, simply increasing blood volume or shutting down non-essential organs would not effectively address the immediate need to restore cardiac function and preserve blood flow to vital areas.