The relationship between Selvester QRS score and myocardial performance index in patients with STEMI treated by primary percutaneous coronary intervention

INTRODUCTION: Electrocardiography (ECG) can be used to evaluate myocardial perfusion by using Selvester QRS score. The myocardial performance index (MPI), which is easily assessed by echocardiography (ECHO), is a technique that assesses both systolic and diastolic function regardless of ventricular shape. Our aim was to compare the association between MPI and Selvester QRS score in ST segment elevation myocardial infarctus (STEMI) patients.
METHODS: Prospectively and sequentially, 101 patients with STEMI who came to our hospital between December 1, 2015, and September 31, 2017 were included in the research. The echocardiographies and ECGs performed between 24-48 hours of admission. Based on MPI value we separated the population into two groups. We considered patients with MPI≥ 0.4 as group 1, and patients with MPI <0.4 as group 2.
RESULTS: The mean age of the patients was 57,6 ± 11 years with 17% being female. The MPI and Selvester QRS score showed a positive correlation (coefficient: 0.501, p<0.001). A negative correlation was found between MPI and EF (coefficient: -0.353, p = 0.001) and GFR (coefficient: -0.219, p = 0.028).In multivariable logistic regression analysis Selvester QRS score was an intependent predictor of MPI (%95 CI: 0.599-0.981, p=0.035). In the ROC-curve analysis performed for MPI and Selvester QRS score, 69% sensitivity and 60% specificity were found for the Selvester QRS score cut-ff value of 3.5 (%95 CI: 0.656-0.848, AUC: 0.752, p <0.001).
DISCUSSION AND CONCLUSION: Our study's findings indicate that we may predict left ventricular MPI in STEMI patients receiving primary PCI by using the Selvester QRS score.