What is the main parameter to monitor when administering milrinone?

The primary parameter to monitor when administering milrinone is cardiac rhythm. Milrinone is a phosphodiesterase inhibitor that has inotropic and vasodilatory effects, often utilized in patients with heart failure to improve their cardiac output and decrease afterload. As it directly impacts the heart's contractility and rhythm, monitoring the cardiac rhythm is crucial.

Milrinone can potentially lead to arrhythmias, so it is essential to keep a close watch on any changes that may indicate an adverse effect. The medication can alter the intracellular signaling pathways, which can affect the electrical conduction system of the heart. Therefore, consistent monitoring of cardiac rhythm helps in early detection of any arrhythmias or conduction disturbances that may arise during treatment.

While parameters like blood pressure and respiratory rate are important in the overall management of a patient receiving milrinone, they are not as directly affected by the medication as the cardiac rhythm. Temperature is generally not a concern in this context when milrinone is being administered.