Resolution Extent of ST Segment Post Primary Percutaneous Coronary Intervention a Predictor of Better Outcomes

Abstract

Objective: The impact of Early ST-Segment Resolution in Acute ST-Elevation Myocardial Infarction after primary percutaneous coronary intervention.
Methods: This was a prospective study done at Alnajaf cardiac center. Patients of ST elevation myocardial infarction, who were treated with primary percutaneous coronary intervention, were recruited at the time of arrival in the emergency department. ECG was acquired at baseline and within 60 minutes post primary percutaneous coronary intervention. Patients were subsequently divided into two groups (A) Patients with ST segment resolution (B). Patients without ST segment resolution.
Results: Ninety patients included in this prospective study, (82%) patients showed ST resolution in their post primary percutaneous coronary intervention, ECG was taken immediately and within 60 minutes after procedure (group A), while (26%) patients showed no ST resolution (group B). Twenty six patients were underwent primary percutaneous coronary intervention within three hours after onset of symptoms, (96%) of them showed ST resolution while (4%) did not show ST resolution. Among the 34 patients who underwent primary percutaneous coronary intervention within 3-6 hours after onset of symptoms, (85%) showed ST resolution and (15%) did not show ST resolution. Thirty patients were underwent primary percutaneous coronary intervention within 6-12 hours after onset of symptoms and among them (66%) showed ST resolution and (34%) did not show ST resolution, P value 0.0133. Out of 90 patients, one died and his ECG did not show ST resolution in the post primary percutaneous coronary intervention. There was a statistically significant difference in the incidence of all the complications between the two groups P value < 0.001.
Conclusions: The extent of ST segment resolution after primary percutaneous coronary intervention provides a good predictor of patient clinical outcome.