GSTM1 and myocardial ischemia: The final scoring system was derived as such: previous LGITB admission (1.5 points); history of IHD (2 points); DRE findings of blood (2.5 points); presence of syncope or dizziness (2 points); initial SBP > 135 mmHg (0 point), 120-134 mmHg (1 point), 90-119 mmHg (2 points) and < 90 mmHg (6 points); initial Hb > 13 (0 point), 11–12.9 g/dL (2 points), 10–10.9 g/dL (3 points) and < 10 g/dL (7 points).