Risk for Anaphylactic Reaction from Cardiac Catheterization in Patients Receiving β-Adrenergic Blockers or Angiotensin-Converting Enzyme-Inhibitors

Background: β-Adrenergic blockers (BBs) have been associated with increased risk for severe anaphylactic reaction (AR) from contrast media; however, this was shown with intravenous contrast media, before widespread use of low osmolar contrast media, angiotensin-converting enzyme-inhibitors (ACE-Is), and cardioselective BBs.

Objective: To assess the risk for AR during cardiac catheterization (CC) associated with BB or ACE-I exposure.

Methods: Patients who experienced adverse reactions during CC from January 2004 to December 2013 were identified; 1 to 2 matched controls were assigned for each case. We analyzed AR rates in association with demographic variables, medication exposures (BBs, ACE-Is, angiotensin-receptor blockers, aspirin), and comorbidities: cardiovascular disorders, asthma, and atopy.

Results: We analyzed 71,782 CCs. Of these, severe 70 reactors were identified-46 (0.06%) fulfilled AR criteria. There were 35 cases of mild to moderate AR and 11 cases of severe AR (0.015%). There were no significant differences in age (61.3% vs 61.5%), sex (63% vs 64% males), cardiovascular disorder rate (78% vs 93%), and exposure to BBs (46% vs 51%; cardioselective: 77% vs 80%) and ACE-Is (37.0% vs 37.2%) in cases versus controls. Via multivariate logistic regression, BB exposure was not associated with greater AR frequency (P = .35) or severity (P = .40). Neither cardioselective BBs (P = 0.2) nor noncardioselective BBs (P = .5) influenced AR severity. ACE-Is had no effect on AR frequency (P = .35) or severity (P = .14). Lower AR frequency was associated with cardiovascular disorder (P = .01).

Conclusions: In this case-control study, severe AR was rarely observed. Exposure to BBs or ACE-Is did not significantly influence AR frequency or severity; however, most BBs were cardioselective. Our findings imply that cardioselective BB or ACE-I suspension is not warranted in association with CC.