Which of the following are calcium channel blockers?

Study for the NBEO Part II TMOD Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

Which of the following are calcium channel blockers?

Explanation:
Calcium channel blockers work by inhibiting L-type calcium channels, reducing calcium entry into cardiac muscle and vascular smooth muscle. This leads to vasodilation and, with non-dihydropyridine blockers like verapamil, decreased myocardial contractility and slower AV nodal conduction. Verapamil is the calcium channel blocker here because it directly blocks these L-type calcium channels, mainly affecting the heart and AV node to lower heart rate and contractility. The other drugs don’t share this mechanism: lisinopril is an ACE inhibitor, propranolol is a beta-blocker, and furosemide is a loop diuretic.

Calcium channel blockers work by inhibiting L-type calcium channels, reducing calcium entry into cardiac muscle and vascular smooth muscle. This leads to vasodilation and, with non-dihydropyridine blockers like verapamil, decreased myocardial contractility and slower AV nodal conduction. Verapamil is the calcium channel blocker here because it directly blocks these L-type calcium channels, mainly affecting the heart and AV node to lower heart rate and contractility. The other drugs don’t share this mechanism: lisinopril is an ACE inhibitor, propranolol is a beta-blocker, and furosemide is a loop diuretic.

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