Objective: Epidemiology of abnormal haemoglobin levels and its association with severity of coronary artery disease in Indian patients is uncertain. This prospective observational study was conducted to determine the haemoglobin levels in acute coronary syndrome (ACS) patients and the association of anaemia with the severity of coronary artery disease (CAD) on coronary angiography (CAG).
Methods: The patients diagnosed with ACS (ST-elevated and non-elevated MI, unstable angina) based on ECG and cardiac enzymes and admitted in cardiology ICU were enrolled in the study after fulfilling study criteria and the baseline haemoglobin level was recorded. The severity of coronary disease of patients who underwent coronary angiography was recorded.
Results: A total of 162 patients were enrolled for the study. The overall haemoglobin of patients was 11.99 ± 2.24 g/dl with 12.46 ± 2.33 g/dl in males and 11.17 ± 1.82 g/dl in females (p < 0.05). Anaemia was found in 62.96% patients with no significant gender difference (p > 0.05), however abnormal haemoglobin level (Hb > 16g/dl) was found exclusively in 7.7% males. One hundred one patients underwent coronary angiography and anaemia was present in 60 patients (58.82%) and absent in 41 (40.59%). The difference in mean haemoglobin levels in anaemic patients with single, double, and triple vessel disease was significant (p < 0.05) and corresponding levels in non-anaemic patients were insignificant (p > 0.05). A weak correlation was observed between the haemoglobin level of patients and the percentage of obstruction in CAG (r = 0.26). The odds of having triple vessel disease in anaemic patient are 1.77 (95% CI 0.71 to 4.43). However, the association between anaemia and the severity of coronary artery disease was statistically found to be non-significant.
Conclusion: The mean haemoglobin levels decreased as the severity of CAD increased in CAG, however the association was not established between anaemia and the severity of coronary artery disease statistically.
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