Introduction:Coronary heart disease (CHD) is a major cause of mortality globally and this health problem is reaching epidemic in both developed, as well as, in developing countries. 1 It will be the leading cause of disability worldwide by the year 2020. 2 Non-ST segment elevation acute coronary syndrome (NSTE ACS) accounts for approximately 2-2.5 million hospital admission annually worldwide. 3 MA Siddique has explained that multiple cardiovascular risk factors along with ignorance about risk factors as a cause of recent increases of occurrence of unstable angina in Bangladesh. 4 Rapid risk stratification is crucial for appropriate management of this group of patient. Prognostic value of ST segment deviation (both elevation and depression) was studied in the Thrombolysis In Myocardial Ischemia (TIMI) III registry by Cannon CP 1997. 5 Specifically prognostic value of ST segment depression in coronary artery diseases was assessed by various studies. [6][7][8][9][10][11][12][13] Kaul et al. found that a categorical quantification of the amount and distribution of ST segment depression can identify a gradient of risk independent of clinical variables. 10
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