Cardiac Surgery Certification (CSC) Practice Exam

In the context of treating postoperative right ventricular (RV) dysfunction, the use of beta blockers is considered contraindicated. This is due to the fact that beta blockers can reduce heart rate and myocardial contractility, which is particularly detrimental in the setting of RV dysfunction. The right ventricle may already be struggling to pump effectively, and any load that reduces its contractility can worsen the patient’s condition.

In contrast, volume infusion is often used to help increase preload, improving cardiac output, which is crucial in managing RV dysfunction. Maintaining atrioventricular (AV) synchrony is important for effective heart function and to ensure that the heart chambers are working together properly. Pacing may also be necessary to help maintain an adequate heart rate and improve hemodynamics. Therefore, beta blockers are not appropriate when managing postoperative RV dysfunction, while the other options are therapeutic strategies that can provide support in this clinical scenario.