Studies investigating QRS-complex abnormalities in association with cocaine use reported widened QRS-complex widths ... rhythm disturbances other than sinus tachycardia were documented in both ...

6,11 Heart rates ≥30 beats/min are considered normal in highly trained athletes. Sinus arrhythmia is also common, particularly in younger athletes. IRBBB (commonly characterised as an rSR′ pattern in ...

A wide QRS can mean the impulse is starting in the ... an accelerated idioventricular rhythm may persist and take over the heart's normal sinus rhythm. It may cause symptoms like light-headedness ...

Ectopic, originating outside of the SA node, and thus the QRS morphology would be different from the normal morphology when the action potential travels through the normal conduction system. Wide ...

This wide QRS complex tachycardia has a typical left bundle branch block pattern, but two things give the clue that this is ventricular tachycardia. There is a fusion beat (second from left ...

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 ...