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 ...

then an intraventricular conduction delay with a widened QRS complex, then bradycardia. Eventually a “sine wave” pattern ensues. Hyperacute T waves are large and broadly shaped, occurring in ...

Heart rate is between 60 and 100 beats per minute. P waves will be present and have the same shape throughout. A QRS complex will follow each P wave. The P-R intervals will be between 120 to 200 ...