American Association of Critical-Care Nurses (AACN) Certification Practice Test

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Prepare for the AACN Certification Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

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What is the primary function of the balloon inflating during diastole in IABP therapy?

To decrease blood flow to the heart
To force blood into the coronary arteries
To reduce arterial resistance
To increase right ventricular pressure

The correct answer is: To force blood into the coronary arteries

The primary function of the balloon inflating during diastole in Intra-Aortic Balloon Pump (IABP) therapy is to force blood into the coronary arteries. During diastole, when the heart is relaxed, the inflating balloon creates a temporary increase in diastolic pressure within the aorta. This action helps to enhance coronary perfusion by redirecting blood flow into the coronary arteries, which supply the heart muscle itself with oxygenated blood. In addition to this vital role in improving coronary circulation, the inflated balloon also creates a differential pressure that assists in reducing the workload of the heart. By improving blood flow to the coronary arteries, IABP therapy can help alleviate ischemia and improve myocardial oxygen supply, ultimately aiding in the management of patients with severe cardiac conditions, such as cardiogenic shock or unstable angina. Understanding this mechanism is crucial for healthcare professionals, as it highlights the therapeutic effects of IABP therapy and its role in supporting patients with compromised cardiac function.