Match the component of the electrocardiogram to the correct definition. Match the component of the electrocardiogram to the correct definition. 1. P wave (Click to select) 2. QRS complex (Click to select) 3. T Wave (Click to select) 4. PQ segment Click to select) 5. ST segment (Click to select) (Click to select) Atrial contraction or atrial systole Ventricular depolarization Ventricular repolarization Atrial depolarization Ventricular contraction or ventricular systole