R wave and S wave, the “QRS complex” represents ventricular depolarization. This term can be confusing, as not all ECG leads contain all three of these waves; yet a “QRS complex” is said ...

The three irregularly irregular rhythms are atrial fibrillation, atrial flutter with variable conduction and multifocal atrial tachycardia (similar to wandering atrial pacemaker). Atrioventricular ...

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 ...

1 The majority of disorders associated with increased risk of sudden cardiac death (SCD), such as cardiomyopathies and primary electrical diseases, are suggested by abnormal findings present on an ECG ...

In an ectopic atrial rhythm, P waves are present but are ... ST segment followed by a negative T wave (figure 10). The most commonly used voltage criterion for LVH is the Sokolow-Lyon index. However, ...

Furthermore, the ECG software double-counted the QRS complexes, as it misleadingly counted T waves too (151 bpm; red box/arrow). Pulse oximetry revealed the correct heart rate of 76 bpm.

In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial ... atrial fibrillation, T wave inversion, and minor Q waves. Cox analysis found a positive association ...