Safety of Calcium Channel Blockers in Patients With Severe Aortic Stenosis and Hypertension

Abstract

Background: There is a paucity of data on safety of calcium channel blockers (CCB) in patients with severe aortic stenosis (AS) and hypertension.

Methods and results: Among 2,460 patients with severe AS and hypertension receiving antihypertensive therapy in the CURRENT AS registry-2, we compared the clinical outcomes between patients taking antihypertensive therapy with CCB (CCB group) and without CCB (no CCB group). In the entire study population, CCB was prescribed in 1,763 patients (71.7%), which was the most commonly prescribed antihypertensive agents. The prescription rates of angiotensin converting enzyme inhibitors or angiotensin receptor blockers, beta-blockers, and thiazides were 61.9%, 25.6%, and 7.3% in the CCB group, and 75.8%, 54.4%, and 6.0% in the no CCB group. In the propensity score matched cohort, the cumulative 3-year incidence of all-cause death or hospitalization for heart failure was not different between the CCB and no CCB groups (38.3% vs. 38.7%, log-rank P=0.65; HR, 0.94; 95%CI, 0.77-1.15; P=0.56). The cumulative 3-year incidence of syncope was low regardless of CCB prescription (1.1% vs. 1.0%, P=0.74).

Conclusions: Among patients with severe AS and hypertension, CCB was the most commonly prescribed antihypertensive agents, and antihypertensive therapy with CCB was associated with comparable clinical outcomes to antihypertensive therapy without CCB. Syncope was rarely seen in patients with severe AS and hypertension receiving antihypertensive therapy regardless of CCB prescription.

Keywords: Antihypertensive therapy; Aortic stenosis; Calcium channel blockers; Hypertension; Syncope.