Sinus tachycardia is recognized on an ECG with a normal upright P wave in lead II preceding every QRS complex. This indicates that the pacemaker is coming from the sinus node and not elsewhere in ...

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 ... of 4 h/week) is associated with unique electrical manifestations that reflect increased vagal tone and enlarged cardiac chamber size. These ...

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 ...

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 ...