Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. This is manifested as an upright P wave in lead II of the ECG. Sinus bradycardia ...

The ability to identify an abnormality on the 12-lead ECG ... AV block. Sinus bradycardia is defined as a heart rate of <60 beats/min and is present in up to 80% of highly trained athletes.6,11 Heart ...

To understand the difference between normal sinus rhythm and sinus arrhythmia, it's best to start by exploring the role of an electrocardiogram (ECG or EKG) in diagnosing such rhythms. During an ...

This is not recognizable on the 12-lead ECG because the time that SA node fires is not able to be determined. The ECG may simply show sinus rhythm or sinus bradycardia. This is different than a ...

ECG interpretation ... further evaluation needed. Normal ECGs include common, training-related findings in athletes such as high QRS amplitude meeting voltage criteria for left ventricular hypertrophy ...