The Normal ECG. A normal ECG contains waves, intervals, segments and one complex, as defined below. Wave: A positive or negative deflection from baseline that indicates a specific electrical event.

The axis is normal between 0° and +90° (positive QRS complex in leads I and aVF). The QT/QTc intervals are prolonged (420/480 msec) but are normal when the prolonged QRS complex interval is ...

The ECG, in general, has not been implemented prospectively as a predictor for the development of CHF; this will require studies with long follow-up and serial ECGs, in patients at risk, (13) an ...

Based on a study of 1700 highly trained athletes aged between 14 and 18 years, T-wave inversion in the anterior leads (V1–V3) are observed in 2.5% of male and female caucasian athletes aged <16 years ...