Virgós Lamela A, Pedreira Pérez M, Roldán Conesa D, Medrano G A, Cárdenas M
Instituto Nacional de Cardiología Ignacio Chávez, México, D.F.
Arch Inst Cardiol Mex. 1987 May-Jun;57(3):213-5.
The present study attempts to analyze the sensitivity and specificity of the S-T segment depression in I and a VL leads in the diagnosis of postero-inferior myocardial infarction with right ventricular extension. Thirty four specimens from autopsies performed in the Instituto Nacional de Cardiología Ignacio Chávez with histopathological evidence of postero-inferior myocardial infarction, with an adequate clinical, enzymatic and electrocardiographic documentation were studied. In 23 the postero-inferior myocardial infarction had extended to the right ventricle (group I) and in ll only left ventricle was involved (group II). There were not significative differences in severity and extension of coronary obstructions between the two groups studied. Sensitivity of S-T segment depression in DI lead ad diagnosis of right ventricular extension had 82.6%, specificity 90.9%, positive predictive value 95%, negative predictive value 71.4% and diagnostic efficiency 85.2%. Sensitivity of S-T segment depression in a VL lead as diagnostic of right ventricular extension was 91.3%, specificity 81.8%, positive predictive value 91.3%, negative predictive value 81.8% and diagnostic efficiency 88.2%.
本研究旨在分析Ⅰ导联和aVL导联ST段压低对合并右心室扩展的后下壁心肌梗死的诊断敏感性和特异性。对墨西哥国立心脏病学研究所伊格纳西奥·查韦斯医院进行尸检的34例标本进行了研究，这些标本均有后下壁心肌梗死的组织病理学证据，且有充分的临床、酶学和心电图记录。其中23例后下壁心肌梗死已扩展至右心室（Ⅰ组），11例仅累及左心室（Ⅱ组）。研究的两组之间冠状动脉阻塞的严重程度和范围无显著差异。Ⅰ导联ST段压低对右心室扩展诊断的敏感性为82.6%，特异性为90.9%，阳性预测值为95%，阴性预测值为71.4%，诊断效率为85.2%。aVL导联ST段压低对右心室扩展诊断的敏感性为91.3%，特异性为81.8%，阳性预测值为91.3%，阴性预测值为81.8%，诊断效率为88.2%。
