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[Chronologic study of signs of myocardiopathy in progressive muscular dystrophy]
P Barona Zamora1, J Narbona García, M J Alvarez Gómez
1Departamento de Pediatria, Clínica Universitaria de Navarra, Facultad de Medicina, Pamplona.
Insights
Duchenne muscular dystrophy (DMD) patients show earlier cardiac changes than other types. Electrocardiogram alterations appear first, followed by echocardiogram and radiographic changes, correlating with age.
Area of Science:
- Cardiology
- Neurology
- Genetics
Context:
- Progressive muscular dystrophies (PMDs) are a group of inherited disorders characterized by progressive muscle weakness and wasting.
- Cardiomyopathy is a common complication of PMDs, leading to significant morbidity and mortality.
- Understanding the evolution of cardiomyopathy in different types of PMDs is crucial for timely diagnosis and management.
Purpose:
- To analyze the temporal evolution of cardiomyopathy in patients with Duchenne type, Becker type, and autosomal recessive type muscular dystrophies.
- To identify early indicators of cardiac involvement in these conditions.
- To compare the onset and progression of cardiac abnormalities between Duchenne muscular dystrophy and other forms of PMD.
Summary:
- A retrospective study of 33 patients with PMDs (17 Duchenne, 11 Becker, 5 autosomal recessive) investigated cardiac and systemic changes.
- Cardiac follow-up revealed electrocardiogram (ECG) alterations as the earliest sign, preceding echocardiogram, radiographic changes, and heart failure.
- A direct correlation between age and abnormal cardiac tests was observed. ECG abnormalities were significantly more frequent in Duchenne patients under 12.5 years compared to non-Duchenne groups. Echocardiographic and radiographic abnormalities showed a trend towards earlier and more frequent presentation in Duchenne muscular dystrophy.
Impact:
- This study highlights the importance of early cardiac monitoring in patients with muscular dystrophies, particularly Duchenne type.
- Identifying ECG alterations as the primary early sign can facilitate prompt intervention and improve patient outcomes.
- The findings provide valuable insights for clinicians managing patients with PMDs, enabling proactive cardiac care and potentially delaying the onset of heart failure.
Abstract:
In order to analyze the evolution of cardiomyopathy in progressive muscular dystrophies, thirty-three patients (17 with Duchenne type, 11 with Becker type and 5 with the autosomal recessive type dystrophy) were studied retrospectively. Cardiac and systemic follow-up every 3-6 months was made in 29 patients. The electrocardiogram was the first test that became altered, followed by the echocardiogram and thoracic radiograph and finally heart failure manifestations. There was a direct correlation between age and the appearance of abnormal cardiac tests. Electrocardiographic alterations, in patients who were less than 12.5 years of age, were significantly more frequent in the group with Duchenne dystrophy that in the no-Duchenne group. In regards to the appearance of the echocardiographic and radiographic abnormalities, there were no significant differences between the two groups. However, we have noticed a trend towards a more frequent and earlier presentation of these abnormalities in the Duchenne's muscular dystrophy than in the no-Duchenne group.