Exercise-induced asystole with syncope in a healthy young man

Area of Science:

• Cardiology
• Sports Medicine
• Pharmacology

Background:

• Exercise-related syncope can indicate serious cardiovascular conditions.
• Asystole during exercise is uncommon, especially in healthy individuals.
• Cannabinoid use is increasingly prevalent.

Purpose of the Study:

• To report a rare case of exercise-induced asystole in a healthy individual.
• To explore the potential association between long-term marijuana use and exercise-related syncope.
• To investigate the underlying mechanisms of exercise-induced asystole.

Main Methods:

• Case report of a healthy 40-year-old male experiencing syncope after basketball.
• Review of near-syncopal episodes and concurrent marijuana use over 6 months.
• Electrocardiographic monitoring during and after exercise to identify cardiac events.

Main Results:

• The patient experienced syncope following strenuous exercise.
• Monitored exercise revealed a loss of sinoatrial activity and ventricular asystole.
• These findings suggest parasympathetic dominance potentially linked to cannabinoid use.

Conclusions:

• Long-term cannabinoid use may be associated with exercise-induced asystole in healthy individuals.
• Parasympathetic dominance could be a mechanism for exercise-related syncope in this context.
• Further research is warranted to confirm the link between marijuana use and cardiac events during exercise.