Which of the following agents does not increase contractility of the heart?

Question

Quizplus · Accepted Answer

Calcium channel blockers are primarily used to lower blood pressure and to treat arrhythmias and angina. They work by inhibiting the influx of calcium ions into cardiac and smooth muscle cells, which decreases contractility and dilates the arteries, leading to a reduction in heart rate and blood pressure. Unlike the other options listed, which all increase the contractility of the heart, calcium channel blockers have the opposite effect.

Which of the Following Agents Does Not Increase Contractility of the Heart