• Adeel-Ur Rehman, Jahanzeb Malik, Nismat Javed, Imran Iftikhar, and Hamid Sharif.
• Consultant Cardiologist, Department of Cardiology, Rawalpindi Institute of Cardiology, Pakistan.
• Scot Med J. 2021 Feb 1; 66 (1): 34-39.

Background And AimsDespite restoration of blood flow, subtle microvascular obstruction can occur. This obstruction can be graded using myocardial blush grade. We aimed to investigate the role of myocardial blush grade in ejection fraction and adverse outcomes, after percutaneous intervention.MethodsA prospective, observational study was conducted at our institute with a calculated sample size. Variables such as age, gender, and ejection fraction were noted before the intervention. The patients were followed for 3 months to determine the outcomes. The data was analyzed using IBM SPSS software version 26.0. P-value of less than 0.05 was considered significant for the statistical tests.ResultsThere were 74 male and 36 female participants in the study. The mean age was 52.20 ± 10.02 years. The most common adverse outcome was heart failure (18%). There was a significant Pearson's correlation between myocardial blush grade and improvement in ejection fraction (p < 0.05). Improvement in myocardial blush grade was significantly related to a decrease in adverse outcomes (p < 0.05). Regression analysis proved myocardial blush grade and diabetes status as independent predictors of percentage increase in ejection fraction (p < 0.05).ConclusionHigh myocardial blush grade is one of the independent predictors of better outcomes in ST-elevation myocardial infarction.

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