ECG QRS voltage, therefore, can be influenced by a variety of factors other than LV size ... The standards for QRS voltage have been derived from studies of populations of clinically normal children.

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 ...

To understand the difference between normal sinus rhythm and sinus arrhythmia, it's best to start by exploring the role of an ...

The normal ECGs came from National Collegiate Athletic Association (NCAA) Division I collegiate football and basketball athletes and demonstrated common ECG changes consistent with physiological ...

In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads occurs between leads V 3 and V 4 (i.e., there is a dominant S in V 3 and a dominant R in V 4).