Systolic Time Intervals in Patients with Progressive Muscular Dystrophy of the Duchenne Type

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概要

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• Systolic time intervals (STIs) were measured in 57 patients with progressive muscular dystrophy (PMD) of the Duchenne type, and were correlated with the stages of physical disability. The total electromechanical systole (Q-A2), pre-ejection period (PEP), and left ventricular ejection time (LVET) were corrected for heart rate using the linear regression equations calculated from 91 normal subjects. Each systolic time interval index (STII), i.e. corrected STI, was analyzed.In 15 ambulatory patients (Group P-1), the STIls did not differ significantly from those in normal controls. In 37 patients who were unable to walk (Group P-2) and 5 patients who were confined to bed (Group P-3), there was a significant increase (p<0.001) in the PEP index (PEPI), a decrease (p<0.001) in the LVET index (LVETI), and an increase (p<0.001) in the PEP/LVET compared with those in controls. The PEPI (p<.001), LVETI (p<0.025), and PEP/LVET (p<0.001) in Group P-2 differed significantly from those in Group P-1. In Group P-3, the PEPI (p<0.005), LVET (p<0.001), and PEP/LVET (p<0.001) were significantly changed in comparison with those in Group P-2.Remarkable myocardial histopathologic changes suggestive of dystrophy were revealed in autopsies of 3 patients who had been in the severely disabled stage and had shown impaired STIs.It is suggested that cardiac function in patients with moderate to ad-vanced PMD of the Duchenne type is deteriorated in proportion to the disability stages, i.e. the severity of changes in the skeletal muscles.

• International Heart Journal刊行会の論文

著者

• Takahashi Hisako

  First Dept. of Intern, Med., Faculty of Med., Univ. of Tokyo

• Akatsuka Nobuharu

  First Department Of Internal Medicine Faculty Of Medicine University Of Tokyo

• Furukawa Tetsuo

  First Department Of Internal Medicine Fukushima Medical University

• Yamaguchi Tetsu

  First Dept. Of Intern Med. Faculty Of Med. Univ. Of Tokyo

• Saito Tadanori

  First Department Of Internal Medicine Tokyo University

• SAITO Tadanori

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• TAMURA Tsutomu

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• MATSUDA Mitsuo

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• TOMOMATSU Kenichi

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• MURAKAMI Toshikazu

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• TAKAHASHI Hisako

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• YAMAGUCHI Tetsu

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• FURUKAWA Tetsuo

  First Department of Internal Medicine, Faculty of Medicine, University of Tokyo

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