Habibur Rahman Qadri, Hakim Ali Abro, Saeed Ahmed Sangi, Naheed Shaikh, Shabana Lakho, Sheeraz Buriro.
Cornell product index for left ventricular hypertrophy. does it perform better?.
Pak Heart J Jan ;42(1):14-9.

Objective: To determine the sensitivity and specificity of cornell product index for left ventricualr hypertrophy with reference to echocardiography. Design: Descriptive study. Setting: Medical Unit III, Jinnah Post-graduate Medical Centre Karachi. Duration: June 1998- February 1999. Methods: 50 patients with echocardiographic left ventricular hypertrophy (LVH) and 25 normal healthy persons without echocardiographic LVH were included in this study. All patients and control subjects were examined clinically and their ECGs were taken on that same day. Echo LVH was defined if Left Ventricular Mass Index exceeded 118 g/m2 in males and 104 g/m2 in females. Data was preserved and now it is analyzed for Electrocardiographic LVH in view of cornell voltage and cornell product index. Sensitivity and specificity was calculated by standard formula and P value derived by chi square test. Results: 50 patients which were included in the study, 21(42%) were male and 29 (58%) were females; while 25 healthy persons without LVH, 12 (48%) were males and 13 (52%) were females. Cornell voltage criterion was having sensitivity of 48% as over-all, 48% in males and also 48% in females. It was 96% specific. Cornell product index was the higher sensitive criteria by scoringing 57% in males, 62% in females and 60% in all patients. Conclusion: Although electrocardiography is less sensitive than echocardiography, but can perform better in certain groups and with improved criterion. Cornell product criterion has the highest sensitivity as compared to other criteria.

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