Treat a wide-complex tachycardia like ventricular ... then an intraventricular conduction delay with a widened QRS complex, then bradycardia. Eventually a “sine wave” pattern ensues.

Sinus bradycardia occurs on an ECG when there is a normal upright P wave in lead II ― sinus P wave ― preceding every QRS complex with a ventricular rate of less than 60 beats per minute.

In fact, up to 60% of athletes demonstrate ECG changes (in isolation or in combination) such as sinus bradycardia, sinus arrhythmia ... IRBBB (commonly characterised as an rSR′ pattern in V1 with QRS ...

sinus bradycardia, sinoatrial block, and alternating episodes of tachycardia and bradycardia. [1] A large proportion of SND patients also have atrial fibrillation (AF) and prolonged sinus pauses ...

Normal ECGs include common, training-related findings in athletes such as high QRS amplitude meeting voltage criteria for left ventricular hypertrophy, early repolarisation, sinus bradycardia, sinus ...