Automatic External Defibrillation Monitoring in Cardiac Arrest

Foundation for Atlanta Veterans Education and Research, Inc.

Status and phase: Completed; Phase 1

Conditions: Ventricular Fibrillation; Tachycardia, Ventricular; Death, Sudden, Cardiac

Treatments: Device: Defibrillation of pulseless VT/VF by AECD

Study type: Interventional

Funder types: Other

Identifiers

NCT00382928

1216-2004

Details and patient eligibility

About

We propose to randomize automatic external cardioverter/defibrillators (AECD) in patients who are at high risk for life-threatening abnormal heart rhythms (arrhythmias) and are admitted to the telemetry ward, all other treatments being constant including cardiopulmonary resuscitation.

We hypothesize that the automatic, rapid, accurate and specific diagnostic and therapeutic technology used in AECDs will further increase the rate of survival in patients with cardiac arrest through rapid and automatic defibrillation, independent of operator initiation, as compared to standard cardiopulmonary resuscitation initiated by healthcare providers.

Full description

Cardiac arrest (CA) is defined as the sudden cessation of effective cardiac pumping function as a result of either ventricular asystole (inactivity of the heart) or pulseless ventricular tachycardia/ventricular fibrillation (VT/VF). Pulseless ventricular tachycardia/ventricular fibrillation is an abnormal electrical activity of the ventricles of the heart. Rapid diagnosis and treatment are essential because first, more than a few minutes of total CA results in permanent damage to the brain due to lack of oxygen, and second, the success of resuscitative measures is related to the rapidity with which they are instituted following arrest. For a person in VT/VF the probability of successful defibrillation and subsequent survival to hospital discharge is directly and negatively related to the interval between onset of VT/VF and delivery of first shock.

Comparison: By using AECDs we will evaluate if an automatic, rapid, accurate and specific diagnostic technology will further increase the rate of survival in patients with VT/VF by rapid and automatic defibrillation, independent of operator initiation, as compared to standard cardiopulmonary resuscitation (CPR) with conventional defibrillators initiated by healthcare providers. This trial will be a randomized, controlled trial and will test if AECDs can improve outcome measures when compared to traditional responses.

Conventional defibrillators are manually operated defibrillators that have to be attached to the patient and operated by a healthcare provider or layperson. In contrast, the purpose of AECDs is to automatically detect life-threatening arrhythmias and deliver external shocks according to a programmable prescription for hospitalized patients, who may be at transient risk for the development of life-threatening arrhythmias. AECDs immediately and automatically monitor, detect and treat cardiac arrhythmias with no human intervention. The AECD proposed to be utilized in this trial, PowerHeart CRM, a product of Cardiac Science, Inc, has been evaluated in the hospital setting to assess safety and efficacy, and has been approved by the FDA to be prophylactically attached to hospital patients and provide automatic defibrillation therapy without human intervention.

All patients admitted to the telemetry unit will be asked to volunteer for this study. Up to 3,000 patients will be asked to volunteer in this study during their stay in the telemetry unit. This study will evaluate if there is a way to improve survival in CA by comparing two groups

Group 1: This group includes patients admitted to telemetry unit who will undergo standard measures of CPR in case cardiac arrest is suspected.

Group 2: This group includes patients admitted to telemetry unit who will have an AECD attached to the chest wall and who will also undergo standard measures of CPR in case of cardiac arrest.

Enrollment: 192 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• All patients admitted to telemetry ward and emergency department
• Age > 18 years.

Exclusion criteria

• Pregnant women
• Patients with R wave less than 0.5 millivolts.
• Patients with functioning Internal Cardiac Device.
• Patients with cardiac pacemakers if oversensing by AECD is demonstrated (double counting of pacer spikes).
• Patients with visible chest lesions that would prevent AECD pad placement.
• Patients who are designated Do Not Resuscitate.
• Right bundle branch block.
• Patients with Parkinson's disease.
• Patients with seizure disorders

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

192 participants in 2 patient groups

Standard of Care Group

No Intervention group

Description:

Patients will receive standard of care measures in case of cardiac arrest. They will not receive AECD monitoring or intervention

AECD Monitoring + Standard of Care Group

Experimental group

Description:

Patients will receive AECD monitoring and intervention in addition to standard of care in case of cardiac arrest during admission to the hospital. Defibrillation of pulseless VT/VF by AECD.

Treatment:

Device: Defibrillation of pulseless VT/VF by AECD