Ventricular Arrhythmias After Primary Percutaneous Coronary Intervention for STEMI

Area of Science:

• Cardiology
• Interventional Cardiology
• Clinical Research

Background:

• Mortality risk after primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI) is low.
• In-hospital risk of ventricular tachycardia (VT) and ventricular fibrillation (VF) following STEMI and PCI is less understood.
• Understanding late VT/VF risk is crucial for optimizing post-STEMI care.

Purpose of the Study:

• To assess the incidence and risk factors of late VT and VF after primary PCI in STEMI patients.
• To determine the association between late VT/VF and in-hospital mortality.

Main Methods:

• A large cohort study utilizing the US National Cardiovascular Data Registry Chest Pain-MI Registry.
• Included adults (≥18 years) with STEMI treated with primary PCI (2015-2018).
• Multivariable logistic regression analyzed risks of late VT/VF and their association with cardiac arrest and mortality.

Main Results:

• Out of 174,126 STEMI patients, 2.4% experienced late VT or VF (≥1 day post-PCI).
• Late VT/VF was associated with significantly increased in-hospital mortality (AOR 6.40 overall, 8.74 in uncomplicated STEMI).
• Lower left ventricular ejection fraction (LVEF) was a key risk factor for late VT/VF with cardiac arrest.

Conclusions:

• Late VT/VF after primary PCI for STEMI occurs in a small proportion of patients but carries a substantial mortality risk.
• Late VT/VF with cardiac arrest is rare, particularly in uncomplicated STEMI cases.
• Findings inform decisions regarding hospital discharge timing and post-PCI monitoring strategies.