The significance of late-phased dart T wave in the electrocardiogram of children
1970; Elsevier BV; Volume: 80; Issue: 5 Linguagem: Inglês
10.1016/0002-8703(70)90008-6
ISSN1097-6744
AutoresShoichi Awa, Leonard M. Linde, Masashiro Oshima, M Okuni, Kazuo Momma, Norimasa Nakamura,
Tópico(s)Cardiac electrophysiology and arrhythmias
ResumoAbstract Pattern criteria of the precordial ST-T complex in childhood were presented. Some characteristics of new patterns were evaluated as to their specificity, sensitivity, and quantitativity from a hemodynamic viewpoint in a variety of congenital cardiac lesions. Analyses of bifid T waves in normal controls and in patients with cardiac defects revealed a characteristic and consistent distribution of their time phases. A second peak proved to be exaggerated in right ventricular overload. A peculiarly shaped bifid T wave was observed in a significant number of patients with ventricular septal defect. This was termed “dome and dart T wave” in view of its configuration. In atrial septal defect, where the only positive deflection of ST-T complex was the late “dart T wave”, the height of the dart T wave closely correlated with the shunt rate at the atrial level, independent of coexisting mild-to-moderate pulmonary hypertension. Although it is difficult to provide a thorough and experimental basis for mechanisms at present, some probable explanations involving proximity effect are offered and discussed.
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