Less commonly, sinus arrhythmia may indicate an underlying medical problem, like heart disease or heart block. The heart's ...

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 ...

The rhythm is regular at a rate of 130 beats/min ... The P wave is positive in leads I, II, aVF, and V4-V6. This is a sinus tachycardia. The P waves are negative in leads V1-V2, consistent ...

The drug reduces heart rate at rest and during exercise in patients in sinus rhythm while maintaining ... including heart failure with normal ejection fraction, acute heart failure, and those ...