The correct interpretation includes marked sinus bradycardia, a right bundle branch block, and T-wave abnormalities in the lateral leads.
Sinus bradycardia is evidenced by a sinus rate less than 60 beats/min and may be considered “marked” if the rate is less than 50 beats/min.
A right bundle branch block is indicated by a QRS duration ≥ 120 ms, a terminal broad S wave in lead I, and the presence of an RSR’ pattern in lead V1.
Small or nonexistent T waves in leads V5 and V6 are suggestive of lateral ischemia but are not diagnostic in this individual.
His marked bradycardia was attributed to his exceptional athleticism and the fact that the ECG was taken “at rest.” It was not of concern, nor did it require treatment.