I.Sinus Rhythms and Sinus Arrhythmias ■5.Sinus arrest There is no sinus P wave in ECG suddenly.The long interval is not times of P-P interval
I.Sinus Rhythms and Sinus Arrhythmias ◼ 5.Sinus arrest There is no sinus P wave in ECG suddenly.The long interval is not times of P-P interval
II.Premature beat The terms "premature beat""premature contraction""premature systole",or "extrasystole"indicate that the atria,Av junction,or ventricle are stimulated prematurely
II.Premature beat ◼ The terms “premature beat”,”premature contraction”,”premature systole”,or “extrasystole” indicate that the atria ,AV junction, or ventricle are stimulated prematurely
II.Premature beat These premature beats are called "atrial premature beats"when they arise in some portion of the atria .AV junctional premature beats arise in the AV junction.Ventricular premature beats arise in one of the branches of the bundle of His ,the Purkinje network ,or the ventricular muscle
II.Premature beat ◼ These premature beats are called “atrial premature beats”when they arise in some portion of the atria .AV junctional premature beats arise in the AV junction. Ventricular premature beats arise in one of the branches of the bundle of His ,the Purkinje network ,or the ventricular muscle
II.Premature beat 1.Ventricular premature beats 1).The QRS complex is premature ,is 0.12second or more wide ,and is aberrant,notched ,or slurred .It is associated with a T wave that usually point in a direction opposite to the main deflection of the QRS complex. 2).The premature QRS complex is not preceded by a P wave
II.Premature beat ◼ 1. Ventricular premature beats 1).The QRS complex is premature ,is 0.12second or more wide ,and is aberrant,notched ,or slurred .It is associated with a T wave that usually point in a direction opposite to the main deflection of the QRS complex. 2).The premature QRS complex is not preceded by a P wave
II.Premature beat 3).A ventricular premature beat is often followed by a fully compensatory pause(the sum of the R-R intervals including the pre- premature beat and the post-premature beat interval equals the sum of two normal R-R intervals) 4).Multiply,ventricular premature beats that arise from a single focus show a similar shape and usually a similar coupling intervals (distance from the preceding normal QRS complex to the premature ventricular beat)in any one lead
◼ 3).A ventricular premature beat is often followed by a fully compensatory pause(the sum of the R-R intervals including the prepremature beat and the post-premature beat interval equals the sum of two normal R-R intervals) 4).Multiply, ventricular premature beats that arise from a single focus show a similar shape and usually a similar coupling intervals (distance from the preceding normal QRS complex to the premature ventricular beat) in any one lead. II.Premature beat