Echocardiographic grading for long-term mortality risk stratification after first-time ST-segment elevation...

Area of Science:

• Cardiology
• Medical Imaging
• Prognostic Biomarkers

Background:

• ST-segment elevation myocardial infarction (STEMI) is a critical cardiovascular event.
• Assessing long-term mortality risk post-STEMI is crucial for patient management.
• Existing methods may not fully capture the spectrum of myocardial injury severity.

Purpose of the Study:

• To evaluate a simple echocardiographic grading system for stratifying long-term mortality risk in first-time STEMI patients.
• To determine if this system reflects myocardial injury severity and stage.
• To assess its utility in clinical communication.

Main Methods:

• A multicentre prospective registry-based cohort study involving 2708 patients with first-time STEMI.
• Patients were stratified into four echocardiographic grades (1-4) post-discharge.
• Long-term all-cause mortality was the primary outcome, with a median follow-up of 5.5 years.

Main Results:

• Mortality risk increased stepwise with higher echocardiographic grades.
• Grade 4 was independently associated with significantly higher long-term mortality compared to Grade 1 (adjusted HR: 3.35).
• Comparable risk stratification was observed using 90-day echocardiographic data.

Conclusions:

• The echocardiographic grading system effectively stratifies long-term mortality risk after first-time STEMI.
• This simple, objective classification aids in communicating infarct severity beyond the general term 'myocardial infarction'.
• The system offers a practical tool for clinicians to assess and discuss prognosis.