Determinant of microvolt-level T-wave alternans in patients with dilated cardiomyopathy
Kazumasa Adachi, MDa,
Yoshio Ohnishi, MDa,
Takashi Shima, MDa,
Kouhei Yamashiro, MDa,
Asumi Takei, MDa,
Nami Tamura, MDa and
Mitsuhiro Yokoyama, MDa
a First Department of Internal Medicine, Kobe University School of Medicine, Kobe, Japan

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Figure 2 The left ventricular end-diastolic diameter (LVDd) in patients with T-wave alternans (TWA) was significantly larger than that in patients without TWA (p < 0.05). No significant difference was observed in the percent fractional shortening (%FS) and QT dispersion (QTd) between the two groups.
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Figure 3 No significant difference was observed in the signal-averaged electrocardiogram (SAECG) between the two groups. Ventricular tachycardia (VT) was documented in an extremely high percentage of patients in the positive T-wave alternans (TWA) group. Sustained VT was documented in two patients and ventricular fibrillation in one. These three patients were TWA positive.
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