Introduction:
shock index (heart rate (HR) divided by systolic blood pressure (SBP)) may play a substantial role in evaluation and prediction of cardiovascular events, especially in the patients with ischemic heart disease under cardiac procedures. The present study attempted to evaluate the predictive value of the
shock index in early prediction of
mortality in patients with
acute myocardial infarction under primary PCI.Method: 200 patients with
acute myocardial infarction who were candidates for
primary PCI and were gone under which at Seyedoshohada Hospital in Urmia, participated in this study. At the time of admission, the indexes of heart rate and blood pressure were determined, the
shock index (heart rate (HR) divided by systolic blood pressure (SBP)) was calculated, and hence, the patients were divided into two groups: one group with an index lower than or equal to 0.7 and the other one with an index of more than 0.7. SPSS 21 software was used to analyze the above study.Results: in this study, the frequency of hospital
mortality in the group with a lower
shock index was lower than the group with a higher
shock index (p-value = 0.001). According to the evaluation of the area under ROC curve, the
shock index was of a high capability to predict hospital
mortality (the area under ROC curve = 0.895; p-value<0.001). At the cutpoint of 0.7, the
shock index with the sensitivity of 70% and the specificity of 88.4% was the predictor of hospital mortality. Similarly, according to the evaluation of the area under ROC curve, the
shock index was of a high capability to predict mid-term
mortality after hospital discharge (the area under ROC curve = 0.888; p-value<0.001). At the cutpoint of 0.7, the
shock index with the sensitivity of 100% and the specificity of 86.9% was the predictor of mid-term mortality.Conclusion: the
shock index was of a high value in predicting both hospital
mortality and mid-term
mortality in patients with
acute myocardial infarction under primary PCI.