Prevention Of Sudden Cardiac Death After Myocardial Infarction by Defibrillator Implantation

• Status: Not yet recruiting
• Trial end date: 2027-01-31
• Target enrollment: 0
• Participant gender: All

Summary

Patients who have survived a myocardial infarction (MI) are at increased risk for sudden cardiac death (SCD) caused by ventricular tachycardia and ventricular fibrillation. A severely reduced left ventricular ejection fraction (LVEF) as a rough overall measure of impaired heart function after MI was shown to indicate a higher risk for SCD. Based on this observation, two landmark randomised trials, MADIT II and SCD-HeFT, were conducted between end of the 1990s and early 2000s. These trials compared the survival of patients with severely reduced LVEF who received an implantable cardioverter-defibrillator with the survival of patients being on medical therapy alone. They reported a significantly better survival of patients in the defibrillator arm and led to international guideline recommendations for routine implantation of defibrillators in survivors of MI with severely impaired LVEF as a means for primary prevention of SCD. Since then, the management of these patients has changed dramatically with the advent of a series of novel drug classes that reduce not only mortality but specifically SCD leading to a substantial decrease of the sudden death rates as well as of the rates of appropriate defibrillator therapies implanted for primary prevention of SCD. At the same time, the complication rates associated with the defibrilllator therapy remain significant without obvious decrease. Thus, the risk-benefit of routine defibrillator implantation for primary prevention of SCD in patients with severely reduced LVEF has substantially changed since the conduction of the landmark trials that established this therapy. Due to the inherent risks and considerable costs of the defibrillator, a novel randomised adequately powered assessment of the potential benefit or harm of the defibrillator in survivors of MI with reduced LVEF under contemporary optimal medical treatment (OMT) appears imperative.

OBJECTIVE:

To demonstrate that in post-MI patients with symptomatic heart failure who receive OMT for this condition, and with reduced LVEF ≤ 35%, OMT without ICD implantation (index group) is not inferior to OMT with ICD implantation (control group) with respect to all-cause mortality.

• Phase: N/A
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Leipzig Heart Institute GmbH
• Collaborator: Leipzig Heart Science gGmbH

Criteria

Inclusion Criteria:

1. Age ≥18 years.

2. Naïve to implantation of any pacemaker or defibrillator

3. Documented history of MI either as ST segment elevation myocardial infarction (STEMI) or as non-ST segment elevation myocardial infarction (NSTEMI) at least 3 months prior to enrolment.

4. Symptomatic heart failure with New York Heart Association (NYHA) class II or III.

5. On OMT for at least 3 months prior to enrolment.

6. LVEF ≤ 35% (at transthoracic echocardiography or cardiac magnetic resonance imaging [MRI] at least 3 months after MI and at least 3 months prior to enrolment.

7. Signed informed consent. Inclusion criterion I3 defines myocardial infarction according to the 2018 ESC/ACC/AHA/WHF Fourth Universal Definition of myocardial infarction

Exclusion Criteria:

1. Class I or IIa indication for implantation of an ICD for secondary prevention of SCD and ventricular tachycardia (according to the 2022 ESC Guidelines for the management of patients with ventricular arrhythmias and the prevention of SCD, see Appendix V).

2. Ventricular tachycardia induced in an electrophysiologic study.

3. Unexplained syncope when ventricular arrhythmia is suspected as the cause of syncope.

4. Class I or IIa indication for Cardiac Resynchronization Therapy (CRT) (according to the 2021 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure and the 2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy, see Appendix VI and 0)

5. Violation of instruction for use (IFU) of the ICD device selected for implantation (valid for control group patients, only).

6. Hospitalised with unstable heart failure with NYHA class IV within 6 weeks prior to enrolment.

7. Acute coronary syndrome or coronary angioplasty or coronary artery bypass grafting performed within 6 weeks prior to enrolment.

8. Cardiac valve surgery or percutaneous cardiac valvular intervention performed within 6 weeks prior to enrolment.

9. On the waiting list for heart transplantation.

10. Any known disease that limits life expectancy to less than 1 year.

11. Participation in another randomised clinical trial, either within the 3 months prior to enrolment or still on-going (participation in sub-studies connected to this trial is permitted).

12. Previous participation in PROFID.

13. Drug abuse or clinically manifest alcohol abuse.