Bradycardia in an 18-Year-Old Male Athlete.
This electrocardiographic tracing was obtained while the patient was
relaxing after lunch. The tracing shows vagally mediated sinus slowing
and atrioventricular block with one junctional escape beat (pulse rates
of 30 beats per minute). Similar rhythms were noted while the patient
was sleeping. On the same 24-hour recording, sinus rates of more than
180 beats per minute, with a normal PR interval, were seen during exercise.
No symptoms developed during long-term follow-up without therapy.
J.M., DiMarco, J.P., Primary Care: The Evaluation and Management of
Bradycardia, The New England Journal of Medicine, Vol 342, March 9,
2000, p 703-709.