Changing trends in angioedema.

Angioedema can be a life-threatening event presenting to otolaryngologists, emergency medicine physicians, and other physicians. Recent reports suggest an increasing role of angiotensin-converting enzyme inhibitors (ACEIs) in the causation of angioedema. Sixty-four cases occurring between 1994 and 1998 were identified and examined retrospectively. Fifty-eight percent of patients presenting with angioedema were using ACEIs. Ninety-four percent of patients overall, and 92% of patients with ACEI-associated angioedema, were African-American. Tongue, lip, facial, and supraglottic edema were most common. Treatment included intubation in 13% and intensive care unit monitoring in 20%. Nearly all patients were treated with corticosteroids and antihistamines. There were no deaths. Angioedema associated with ACEI use appears to be much more common than previously reported. African-American patients may be at higher risk for angioedema with ACEI use. Successful management was achieved with observation, expectant airway management, corticosteroids, and discontinuation of ACEIs. Patients without airway obstruction or pharyngeal or laryngeal edema who improved with treatment and observation were successfully treated as outpatients.