A Framework for Exception From Informed Consent in Trials Enrolling Patients With ST-Segment-Elevation Myocardial...

Area of Science:

• Cardiology
• Clinical Research Ethics

Background:

• Cardiogenic shock (CS) results in critical end-organ hypoperfusion due to reduced cardiac output.
• Acute ST-segment-elevation myocardial infarction with CS (AMI-CS) is associated with high mortality.
• Clinical trials in AMI-CS patients face challenges due to consent issues and urgent treatment needs.

Purpose of the Study:

• To provide a rationale for conducting clinical trials in AMI-CS patients using exception from informed consent (EFIC) in the United States.
• To address the feasibility and ethical considerations of enrolling AMI-CS patients under EFIC.
• To propose a framework for implementing EFIC in AMI-CS trials, balancing subject protection and research necessity.

Main Methods:

• Review of US human subject regulations for EFIC criteria.
• Comparison of therapeutic windows and consent feasibility between AMI-CS and out-of-hospital cardiac arrest (OHCA) trials.
• Proposal of a specific enrollment protocol including a therapeutic initiation window and consent seeking timeline.

Main Results:

• AMI-CS trials can potentially meet EFIC criteria due to the life-threatening nature of the condition, unsatisfactory treatments, and the necessity for valid evidence.
• Obtaining informed consent is often impractical in AMI-CS, and EFIC enrollment could enhance generalizability.
• A proposed 30-minute window for intervention initiation with 15-minute consent seeking respects patient autonomy while enabling research.

Conclusions:

• Exception from informed consent (EFIC) is a viable and ethical approach for clinical trials in acute ST-segment-elevation myocardial infarction with cardiogenic shock (AMI-CS).
• Implementing EFIC in AMI-CS trials can accelerate the generation of crucial evidence to improve patient care.
• Successful application of EFIC in AMI-CS research can inform future trials in critical cardiovascular conditions.