Awan G M, Calderon E, Dawood G, Alpert M A
Department of Internal Medicine, University of South Alabama College of Medicine, Mobile, USA.
Am J Med Sci. 2000 Jul;320(1):69-71. doi: 10.1097/00000441-200007000-00011.
This case report describes a patient with hypertrophic cardiomyopathy who developed symptomatic atrial fibrillation on two occasions after ingesting sildenafil citrate (Viagra). Sildenafil citrate should be withheld or used with extreme caution in persons with hypertrophic obstructive cardiomyopathy.