Lack of ST-segment depression normalization after PCI is a predictor of 5-year mortality in patients with ST-elevation myocardial infarction

Area of Science:

• Cardiology
• Interventional Cardiology
• Clinical Outcomes Research

Background:

• The prognostic value of reciprocal ST-segment depression normalization (STN) after percutaneous coronary intervention (PCI) in ST-elevation myocardial infarction (STEMI) remains unclear.
• Assessing STN significance is crucial for risk stratification in STEMI patients post-PCI.

Purpose of the Study:

• To evaluate the association between reciprocal ST-segment depression normalization (STN) and long-term mortality in STEMI patients treated with primary PCI.
• To determine if STN serves as a predictive marker for adverse outcomes after successful primary PCI.

Main Methods:

• Analysis of data from 163 STEMI patients who underwent successful primary PCI.
• Patients were categorized into three groups based on the percentage of STN: poor (<30%), partial (30-70%), and complete (>70%).
• Correlation of STN levels with long-term mortality rates and assessment of STN as an independent risk factor.

Main Results:

• Complete STN (>70%) was observed in 63% of patients, partial in 24%, and poor in 13%.
• STN significantly correlated with late mortality, with rates of 15% (complete), 28% (partial), and 38% (poor) (p=0.012).
• A lower mean percentage reduction in ST-segment depression after PCI was associated with higher mortality (50% vs 75%, p=0.001), and was an independent risk factor (OR 1.01, p=0.02).

Conclusions:

• Reciprocal ST-segment depression normalization (STN) is a significant predictor of long-term mortality in STEMI patients post-primary PCI.
• STN emerges as a novel, accessible tool for assessing long-term mortality risk in this patient population.
• The degree of STN provides valuable prognostic information beyond the success of primary PCI itself.