Right precordial mapping. Diagnostic sensitivity and specificity of leads V3R to V6R in different intercostal spaces in cases with right ventricular infarction.

Twelve lead conventional electrocardiography and right precordial mapping including precordial leads V2R to V6R in the 2nd to 5th intercostal spaces were obtained in 150 cases with acute myocardial infarction. There were 27 (18%) cases with right ventricular infarction: 24 associated with inferior wall infarction and 3 with anterior wall infarction. In the right precordial mapping, leads V3R to V6R in all intercostal spaces had equal sensitivity of 100%; 3rd intercostal space recording, however, had the maximum specificity of 92.6%.