Emergency noninvasive external cardiac pacing

Area of Science:

• Emergency Medicine
• Cardiology
• Critical Care

Background:

• Bradyarrhythmias are common in critical emergency department patients.
• External cardiac pacing is a potential intervention for hemodynamic instability.

Purpose of the Study:

• To evaluate the effectiveness of external cardiac pacing in critically ill emergency department patients.
• To identify patient populations most likely to benefit from external pacing.

Main Methods:

• Retrospective analysis of 37 emergency department patients receiving external cardiac pacing.
• Review of indications for pacing, patient response, hemodynamic changes, and survival outcomes.

Main Results:

• Eight patients (21.6%) were successfully paced, with a mean systolic blood pressure increase of 95 mmHg.
• Successful pacing occurred in patients with asystole, complete heart block, sinus/atrial fibrillation with bradycardia, and idioventricular rhythm.
• Six patients (16.2%) survived to hospital discharge, including one asystole patient and others with bradycardia.

Conclusions:

• External cardiac pacing is effective for hemodynamically significant bradycardia.
• Pacing is less effective for asystole or idioventricular rhythm in prolonged cardiac arrest.
• Pacing can be lifesaving in patients with a responsive myocardium.