This results in an upright P wave in lead II on the ECG. If there is a P wave before every QRS complex, and it has a sinus morphology, then normal sinus rhythm, or NSR, is said to be present.

The P waves are positive in leads I, II, aVF, and V4-V6; hence, this is a sinus tachycardia. However, there is AV dissociation: The P waves are dissociated from the QRS complexes and the PR ...

If it occurs slightly above the AV node (low atrium), then the P wave will actually occur slightly before the QRS complex is seen. This will result in the P wave appearing just before the QRS, but ...

These ECG voltage attenuations are of extracardiac mechanism, and impact the amplitude of QRS complexes, P-waves, and T-waves, occasionally resulting also in shortening of the QRS complex and QT ...

Question 1 Atrial flutter with 2:1 conduction Explanation There is clearly a tachycardia with narrow QRS complexes indicating a supraventricular rhythm. The clues to the aetiology are the heart rate ...

The ECG reveals normal sinus rhythm where there are consistent p waves representative of regular atrial depolarization. Each p wave is followed by a QRS complex (ventricular depolarization). The QRS ...