Page 112 - Critical Care Notes
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4223_Tab02_045-106 29/08/14 10:00 AM Page 106
CV ■ ■ ■ ■ ■ Conduction of P waves in no relation to QRS complexes ■ CO →↓ BP . Patient symptomatic. Digoxin toxicity a frequent cause.
QRS: Usually wide
Rhythm: Regular atrial rate and ventricular rate
P wave: Present but atrial rate > ventricular rate
PR interval: No relation of P waves to QRS complexes
Management: Atropine for bradycardia, epinephrine, isoproterenol, pacemaker
Loss of synchrony between atrial and ventricular contractions. Potentially life-threatening. Bradycardia → ↓↓
106 Third-Degree AV Block—Complete Heart Block
