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Updated: Nov 12, 2025

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation

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Successful defibrillation using double sequence defibrillation: Case reports.

Hyo Jeong Choi¹, Hyun Noh²

¹Department of Emergency Medical Technology, Sun Moon University. 70, Asan-si, Chungcheongnam-do.

|March 17, 2021

Summary

This summary is machine-generated.

Double sequence defibrillation (DSD) successfully terminated refractory ventricular fibrillation (RVF) in three cardiac arrest patients. This advanced technique improves the chance of return of spontaneous circulation, even in prehospital settings.

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Area of Science:

Cardiology
Emergency Medicine

Background:

Defibrillation is the primary treatment for ventricular fibrillation (VF) and pulseless ventricular tachycardia.
Cardiac arrest management often involves advanced life support protocols.

Observation:

Three cases of refractory ventricular fibrillation (RVF) were encountered in the emergency department.
Standard defibrillation protocols and advanced cardiac life support measures were initially unsuccessful.

Findings:

Double sequence defibrillation (DSD), utilizing 400J, was successfully employed to terminate RVF in all three patients.
All patients treated with DSD achieved return of spontaneous circulation.

Implications:

DSD is a promising intervention for patients with RVF unresponsive to conventional treatment.
Implementing DSD, particularly in prehospital care, may enhance survival rates for cardiac arrest patients.