Key result
Noncompliant balloon post-dilatation during STEMI PCI linked to ~5% lower in-hospital mortality.
Why the study?
Although post-dilatation improves stent expansion, uncertainty remains regarding potential aggravation of microvascular obstruction and vessel wall injury during primary PCI for STEMI.
Does post-dilatation with a noncompliant balloon reduce complications and mortality in STEMI patients undergoing primary PCI?
Cohort (n=12,608)
Does post-dilatation with a noncompliant balloon reduce complications and mortality in STEMI patients undergoing primary PCI?
In STEMI patients undergoing primary PCI, post-dilatation with a noncompliant balloon is associated with significantly lower risks of in-hospital mortality, cardiac arrest, cardiogenic shock, and heart failure.
Answers are grounded in this paper and cite their sources.
Postdilatation may optimize stents without harming microcirculation in STEMI; leaves open need for RCTs on clinical outcomes.
BACKGROUND: Post-dilatation with a noncompliant (NC) balloon is generally associated with better expansion and apposition of stent struts, leading to improved immediate angiographic results and clinical outcomes. However, some studies have raised uncertainty about its utility, suggesting a potential aggravation of microvascular obstruction and vessel wall injury. Therefore, this study aimed to investigate the impact of post-dilatation on the incidence of complications in STEMI (ST elevation myocardial infarction) patients undergoing primary percutaneous coronary intervention (PCI). METHODS: In this retrospective cohort study, we included consecutive adult STEMI patients (age ≥ 18 years) who underwent primary PCI between October 2022 and December 2024. Patients were categorized into two groups based on post-dilatation status after stent deployment. The post-dilatation and non-post-dilatation groups were compared for complications and immediate outcomes, including mortality, cardiac arrest, cardiogenic shock, heart failure, stroke, and stent thrombosis. RESULTS: The study sample consisted of 12,608 STEMI patients who underwent primary PCI, of whom 10,081 (80%) were male. The mean age was 55.8 ± 10.8 years. Post-dilatation with an NC balloon was documented in 7935 (62.9%) patients. The analysis of matched cohorts revealed, a 4.3% lower risk of cardiac arrest (risk ratio [RR]; 0.957 [95% CI: 0.945-0.97; p < 0.001]), 1.3% lower risk of cardiogenic shock (RR; 0.987 [95% CI: 0.979-0.996; p = 0.003]), 0.9% lower risk of heart failure (RR; 0.991 [95% CI: 0.984-0.997; p = 0.005]), and 4.8% lower risk of in-hospital mortality (RR; 0.952 [95% CI: 0.939-0.966; p < 0.001]) among post-dilatation as compared to non-post-dilatation cohorts. CONCLUSIONS: Post-dilatation with an NC balloon after stent deployment in patients undergoing primary PCI is associated with improved clinical outcomes and lower rates of post-procedure complications and in-hospital adverse outcomes.
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Bhatti et al. (2026) conducted a cohort in ST elevation myocardial infarction (STEMI) (n=12,608). Post-dilatation with a noncompliant (NC) balloon vs. Non-post-dilatation was evaluated on In-hospital mortality (RR 0.952, 95% CI 0.939-0.966, p=< 0.001). Post-dilatation with a noncompliant balloon during primary PCI for STEMI was associated with a lower risk of in-hospital mortality (RR 0.952; 95% CI 0.939-0.966; p<0.001).
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