(1) P wave: sequential depolarization of the right and left atria 2) QRS complex: right and left ventricular depolarization 3)ST -T wave: ventricular repolarization 4) U wave: an electrical-mechanical event at beginning of diastole 5) PR interval: time interval from onset of atrial depolarization (P wave) to onselof ventricular muscle depolarization (QRS complex) 6) QRS duration: duration of ventricular muscle depolarization ( width of the QRS complex) 7) QT interval: duration of ventricular depolarization and repolarization (8) PP interval: rate of atrial or sinus cycle (9) RR interval: raté of ventricular cycle |
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