Page 68 - AACN Essentials of Critical-Care Nursing Pocket Handbook, Second Edition

Treatment depends on rate, and symptoms. ventricular rate. normal ventricular rate. blockers.
Treatment conduction ratio, ventricular Atropine is used for slow No treatment is given with Discontinue digitalis, beta- blockers, and calcium channel Temporary pacemaker may be needed for slow ventricular rate. 55

• • • • •

Cardiac Rhythms, ECG Characteristics, and Treatment Guide (continued)
ECG Characteristics Rhythm: Irregular. Overall appearance of the rhythm demonstrates “group beating.” P waves: Normal. Some P waves are not conducted to the ventricles, but only one PR interval: Gradually lengthens in consecutive beats. The PR i

Rate: Can occur at any sinus or atrial rate. at a time fails to conduct to the ventricle. pause is longer than that following the pause

• • • • • • blocked).

Rhythm Second-degree AV (Wenckebach;
block type I (Mobitz I)
3.12