as not all ECG leads contain all three of these waves; yet a “QRS complex” is said to be present regardless. For example, the normal QRS complex in lead V1 does not contain a Q wave — only a ...

The goal of ECG interpretation in athletes is to classify the ECG as: (1) ‘normal’—no further evaluation ... suggestive of cardiomyopathy such as T-wave inversion, ST depression, pathological Q-waves, ...

These lines are comprised of three main parts: In normal sinus rhythm, the P-P interval (the time between consecutive P waves ...

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 ...