Complete Heart Block From Chronic Marijuana Use

Marijuana is the most commonly used illicit drug in the world. Over the last decade, the potency of marijuana has increased tremendously. Its use is associated with harmful health consequences including adverse cardiovascular effects, such as arrhythmias, myocardial infarction, cardiomyopathy and stroke. It has been reported to cause bradycardia. This report describes the case of a 51-year-old female with no significant past medical history who presented with complete heart block due to chronic marijuana use, requiring a permanent pacemaker. To our knowledge, this is the first reported case of complete heart block due to chronic marijuana use. Advanced conduction system abnormalities can be a potential complication of chronic marijuana use, which the physicians need to be aware of. With increasing push for medical marijuana, physicians are likely to encounter more of such cases.