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Single ventricle: a new angiographic classification
Insights
This study proposes classifying single ventricle heart defects into left ventricular and primitive types. Differentiating these types aids in diagnosing congenital heart disease and understanding vessel variations.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Single ventricle is a complex congenital heart defect.
- Variations in major vessel anatomy can accompany single ventricle.
- Accurate classification is crucial for diagnosis and management.
Purpose of the Study:
- To propose a classification system for single ventricle.
- To differentiate between left ventricular type and primitive type single ventricles.
- To analyze associated major vessel anomalies.
Main Methods:
- Retrospective analysis of 40 patients with single ventricle.
- Classification based on ventricular morphology and atrioventricular valve presence.
- Assessment of major vessel topography using angiography.
Main Results:
- Single ventricles were categorized into left ventricular type (40 patients) and primitive type.
- Among left ventricular type, 10 had normal vessel topography, 13 showed d-transposition, and 17 had l-transposition.
- Angiography confirmed single ventricle by absent ventricular septum and two separate atrioventricular valves.
Conclusions:
- A two-type classification (left ventricular and primitive) for single ventricle is recommended.
- Single ventricle should be considered in the differential diagnosis of cyanotic congenital heart disease.
- Angiographic findings are key for confirming the diagnosis of single ventricle.
Abstract:
The authors recommend that the "single ventricle" be differentiated into two types. There are single ventricles of the left ventricular type, and others of the primitive type; in other words, the chamber is typically left ventricular or cannot be differentiated into left or right. In the latter case we are dealing with a primitive chamber. In addition there may be variations of the large vessels. Of 40 patients with a single ventricle of the left ventricular type, ten showed normal topography of the major vessels, 13 had a d-transposition and 17 an 1-transposition. In the d-transposition, the outflow track of the ventricle was anterior and to the right and the aorta arises in front of the pulmonary artery; in the 1-transposition and sub-aortic portion is anterior and to the left, the aorta is ventral and to the left of the pulmonary artery. In the discussion it is pointed out that the "single ventricle" must be included in the differential diagnosis of cyanotic, congenital heart disease. Angiographic confirmation of the "single ventricle" depends on the demonstration of an absent ventricular septum and of two separate atrio-ventricular valves.