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Two chambered left ventricle. Three new varieties
Insights
This review explores the rare two-chambered left ventricle, comparing it to the more common right ventricular variant. Three unique cases highlight diverse subdivisions and potential causes, including congenital heart defects and myocardial sinusoids.
Area of Science:
- Cardiology
- Congenital Heart Disease
- Cardiac Morphology
Background:
- The two-chambered left ventricle is a rare congenital anomaly.
- It is infrequently compared to the more prevalent two-chambered right ventricle.
- Understanding its variations is crucial for diagnosis and management.
Observation:
- Three distinct cases of left ventricular subdivision are presented.
- Angiocardiography was instrumental in diagnosing two cases.
- Associated anomalies included valve dysplasia, endocardial fibroelastosis, and lung malformation.
Findings:
- Case 1: Left heart hypoplasia with severe valve stenosis and endocardial fibroelastosis.
- Case 2: Valve dysplasia, endocardial fibroelastosis, and congenital left lung malformation.
- Case 3: Unique ventricular subdivision without other congenital defects, possibly an intramyocardial aneurysm.
Implications:
- Highlights the diverse presentations of two-chambered left ventricle.
- Suggests a role for intertrabecular myocardial sinusoids in pathogenesis.
- Emphasizes the importance of advanced imaging in diagnosing rare cardiac conditions.
Abstract:
A short review of two chambered left ventricle is given, and this rare condition is briefly compared and contrasted with the more common condition involving the right ventricle. Three cases are described, each of which presents a new variety of subdivision of the left ventricle; in two of these the condition was first shown by angiocardiography. The first case had left heart hypoplasia with dysplastic stenosis of the mitral and aortic valves and severe endocardial fibroelastosis of the main left ventricular cavity. The second case also showed dysplasia of the left sided valves with pronounced endocardial fibroelastosis, and in addition there was a congenital malformation of the left lung. The third case showed a bizarre ventricular subdivision without other congenital malformations. The role of the intertrabecular myocardial sinusoids in the pathogenesis of some types of two chambered ventricle is discussed and this is considered to have been of significance in the first two cases. The third case possibly represented an intramyocardial aneurysm of obscure aetiology.