ST-Segment Resolution after Primary Percutaneous Coronary Intervention (PCI) in Patients with Acute ST-Segment Elevation Myocardial Infarction (STEMI)

Abstract

Objective: To assess the ST segment resolution >50% in electrocardiogram taken after one hour of primary percutaneous intervention as compared to initial elevation as the predictor of successfulness of procedure.

Study Design: Observational study.

Place and duration: The study was conducted at PAF Hospital, Islamabad, Pakistan from February 2019 to January 2020 in one-year duration.

Methodology: A total of 100 patients presenting with ST-segment elevation myocardial infarction (STEMI) were planned for primary percutaneous coronary intervention and were enrolled in the study. Baseline ECG was taken, and 2^nd ECG was taken after one hour of PCI. ST resolution is the main outcome variable of the study. SPSS version 23 was used for data analysis.

Results: ST-Resolution was noted in n=66 (66%) patients with (63.2-68.5%) 95% CI. Regarding the association of ST-Resolution with effect modifiers no statistically significant differences were found. The patients >40 years of age had about 2 times more risks in non-ST-resolution, (1/0.51=1.96 OR). 

Conclusion: In patients with ST-elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention, ST-segment resolution in electrocardiograms recorded 1 hour after primary PCI is a sign of a successful procedure and good perfusion.