Background Right ventricular infarction (RVI) is common in patients with inferior wall myocardial infarction (IWMI). Right ventricular involvement increases mortality and morbidity in IWMI patients. Clinical presentation of RVI differs, and accordingly treatment and management of patients also differs. Aim To find out the frequency of RVI among patients with acute IWMI and to determine the utility of clinical examination, electrocardiography (ECG), and echocardiography (ECHO) in the diagnosis of RVI and its severity. Also o study the frequency and complications with reference to sex. ) were done to diagnose RVI and its severity. RVI patients were divided into two groups basing on RVEF as severe RVI (EF < 35%) and mild RVI (EF > 35%). Results Forty-three (43%) patients had RVI. Thirty-one (72%) patients had mild RVI (EF > 35%) and 12 (28%) had severe RVI (EF < 35%). Clinical examination had less sensitivity (35%) and high specificity (93%) in the diagnosis of RVI whereas it was highly sensitive (100%) and specific (90%) in detecting severe RVI. Total ST elevation of ! 3 mm was highly sensitive (92%), and ! 5 mm was highly specific (94%) in detecting severe RVI. RVEF (p < 0.01), RVESVI (p < 0.01), RVEDVI (p < 0.01), RVSVI (p < 0.05), and total ST elevation (p < 0.01) were equally effective in detecting severe RVI. Case fatality rate in RVI was 7%. Proportional mortality rate in females was 67%, with higher mortality in females compared with males (p 0.05). Conclusion Right-sided leads should be taken in all cases of acute IWMI. Careful clinical examination, total ST elevation in V 1 , V 2 , V 3R , V 4R , ECHO RVESV, RVEDV, RVSV, RVEF, RVESVI, RVEDVI, and RVSVI are useful in detecting severe RVI. Complications were significantly associated with the severity of RVI. Mortality is high in females compared with males.

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