Which agent binds to Ca++ channels to decrease Ca++ influx and to slow the response of the sinoatrial (SA)and atrioventricular (AV)node?

Question

Quizplus · Accepted Answer

Diltiazem is a calcium channel blocker that binds to the calcium channels, decreasing calcium influx and slowing the response of the sinoatrial and atrioventricular nodes. Metoprolol and propranolol are beta-blockers that work by reducing the effects of the sympathetic nervous system on the heart, but they do not have a direct effect on calcium channels. Dobutamine is a beta-agonist that increases heart rate and contractility and would not be useful in slowing the response of the SA and AV nodes.

Which Agent Binds to Ca++ Channels to Decrease Ca++ Influx