A combination of the Q wave, 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 ...

Because the electrical activation originates at or near the AV node, the P wave is frequently not seen; it can be buried within the QRS complex, slightly before the QRS complex or slightly after ...

Upon review of this body and the described ECG findings ... Studies investigating QRS-complex abnormalities in association with cocaine use reported widened QRS-complex widths at rates ranging ...

A similar reduction in the incidence of inferolateral T-wave abnormalities was ... patients produces the following ECG changes: a rightward shift in P-wave, QRS, and T-wave axes; a reduction ...

The goal of ECG interpretation in athletes is to classify the ECG as: (1) ‘normal’—no further evaluation needed or (2) ‘abnormal’—further evaluation needed. Normal ECGs include common, ...