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[Persistence of spongy myocardium: apropos of a case]
Insights
A rare heart condition called persistent spongy myocardium affected a child's entire heart. This condition involves abnormal heart muscle development and carries a high risk of serious cardiovascular issues.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Medical Imaging
Background:
- Persistent spongy myocardium is a rare congenital heart abnormality.
- It results from the persistence of embryonic myocardial tissue, characterized by a prominent network of trabeculations and intertrabecular spaces.
- This condition can lead to significant cardiovascular complications.
Observation:
- A 2.5-year-old child presented with peripheral cyanosis.
- Echocardiography showed severe biventricular dilated cardiomyopathy with hypertrophied, irregular myocardial walls.
- Suprasystemic pulmonary hypertension with elevated pulmonary resistances was noted.
Findings:
- Magnetic resonance imaging and angiography confirmed the diagnosis of persistent spongy myocardium.
- The case demonstrated biventricular involvement without associated congenital cardiac malformations.
- This presentation is unusual due to the extensive myocardial abnormality and lack of other cardiac defects.
Implications:
- This case highlights the importance of recognizing persistent spongy myocardium, even in the absence of other congenital anomalies.
- Biventricular involvement and suprasystemic pulmonary hypertension indicate a poor prognosis.
- Early diagnosis and management are crucial for mitigating severe cardiovascular complications in affected children.
Abstract:
A two and a half year old child was admitted to hospital with peripheral cyanosis. Echocardiography revealed severe dilated cardiomyopathy affecting both ventricles with abnormally hypertrophied and irregular myocardial walls. The pulmonary hypertension was suprasystemic with raised pulmonary resistances. The magnetic resonance imaging and angiography confirmed the diagnosis of persistence of spongy myocardium. This is a rare abnormality due to the persistence of embryonic myocardium with a network of trabeculations and intertrabecular spaces as usually observed during echocardiography. This case is noteworthy because of the biventricular involvement and the absence of associated congenital cardiac malformation. The prognosis is characterised by a high risk of severe cardiovascular complications.