第10题: [简答题]Describe the meaning for major components and intervals of ECG. (10 Points) 参考答案:
P wave: atrial depolarization (2`);
QRS complex: depolarization of ventricles (2`);
T wave: repolarization of ventricles (2`);
PR interval is the interval from the beginning of atrial activation to the beginning of ventricular activation (2`);
QT interval is required for ventricular depolarization and repolarization. (1`);
ST-segment: potential of myocardial cell in each part of ventricle is equal to each other and located at the platform period of AP (1`).