PMID: 8938701Oct 1, 1996Paper

Cardiac and respiratory involvement in advanced stage Duchenne muscular dystrophy

Neuromuscular Disorders : NMD
P MelaciniS Dalla Volta

Abstract

This study aimed to describe myocardial involvement, respiratory impairment and pulmonary blood flow abnormalities in advanced-stage Duchenne muscular dystrophy (DMD). Twenty-one wheelchair-bound patients, aged from 10 to 24 yr, underwent electrocardiographic and echocardiographic examination, conventional spirometry, diurnal arterial blood gas analysis, and nocturnal polysomnography (SaO2 monitoring). Diagnosis was confirmed by neurological examination, dystrophin analysis at protein and DNA level. Patients were classified into two groups: group A normoxemic (14 cases) and group B with nocturnal hypoxemia (seven cases). Group A was further split into two subgroups, one without, and one with, left ventricular dilation (A1 = nine patients, end diastolic volume (EDV) = 51 ml m-2, ejection fraction (EF) = 56 per cent; A2 = five patients, EDV = 112 ml m-2, EF = 32 per cent; P < 0.05). Left ventricular regional wall motion abnormalities were found in 55, 40, and 43 per cent of groups A1, A2, and B patients respectively. Analysis of pulsed Doppler pulmonary data highlighted a significant reduction in corrected time to peak velocity in group B patients, when compared with control, A1, and A2 groups respectively. In group A, we observe...Continue Reading

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