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  • Title: [Relation of T wave polarity in precordial V1 lead to right coronary pathoanatomy in inferoposterior wall acute myocardial infarction].
    Author: Kataoka H, Tamura A, Mikuriya Y.
    Journal: J Cardiol; 1994; 24(1):17-22. PubMed ID: 8158527.
    Abstract:
    To test the hypothesis that right ventricular (RV) involvement may affect precordial T wave polarity, the relationship of T wave polarity in lead V1 to right coronary pathoanatomy was examined in 61 patients with first inferoposterior wall acute myocardial infarction (AMI) due to right coronary occlusion within 5 hours of symptom onset. One hundred healthy subjects served as normal controls. The patients were divided into two major groups based on the site of right coronary occlusion: group A (n = 34) with proximal occlusion and group B (n = 27) with distal occlusion. Each major group was classified into two subgroups according to the direction of the ST segment shift in lead V1. Group A was divided into subgroups A1 (27 patients with isoelectric or ST segment elevation) and A2 (7 patients with ST segment depression), and group B into subgroups B1 (8 patients with isoelectric or ST segment elevation) and B2 (19 patients with ST segment depression). The incidence of upright T wave in lead V1 (> or = 0.15 mV) was higher in the patients with proximal right coronary occlusion (70.6%) than in the controls (27%) (p < 0.001) or the patients with distal right coronary occlusion (18.5%) (p < 0.001). Upright T wave occurred most frequently in subgroup A1 (89%) (p < 0.001 vs controls), and least in subgroup B2 (6%) (p < 0.05 vs controls). T wave polarity agreed with the direction of the ST segment shift in 40 of 61 AMI patients (66%) and disagreed in only one patient (2%).(ABSTRACT TRUNCATED AT 250 WORDS)
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