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Analysis of Coronary Vessels in Cleared Embryonic Hearts
Published on: December 7, 2016
Morphometry of coronary capillaries in hypoplastic left heart syndrome
Caner Salih1, Mary N Sheppard, Siew Yen Ho
1Departments of Pediatrics and Histopathology, Imperial College, London, United Kingdom.
Insights
Hypoplastic left heart syndrome (HLHS) reduces ventricular myocardial capillarization in both ventricles. This finding suggests an inherent abnormality in HLHS that may impact surgical reconstruction and ventricular development.
Area of Science:
- Cardiovascular Research
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Hypoplastic left heart syndrome (HLHS) involves severe malformations of the left heart side.
- Understanding ventricular myocardial capillarization is crucial for surgical outcomes in HLHS.
Purpose of the Study:
- To quantify and compare the capillary network in the ventricular myocardium of HLHS hearts versus controls.
- To assess the implications of capillarization differences for surgical reconstruction.
Main Methods:
- Immunohistochemistry using von Willebrand's factor antibody to detect endothelial capillaries.
- Quantification of capillary distribution and diffusion distances in ventricular myocardium.
Main Results:
- Hearts with HLHS exhibited increased mean and maximal diffusion distances to the nearest capillary.
- No significant difference in capillary distribution heterogeneity was observed between HLHS and control hearts.
- Increased diffusion distances were noted in both right and left ventricles of HLHS hearts.
Conclusions:
- HLHS hearts demonstrate reduced capillarization in both ventricles compared to age-matched controls.
- This reduced capillarization is likely an inherent feature of HLHS.
- The findings suggest potential implications for ventricular development and surgical strategies in HLHS.
Background:
Hypoplastic left heart syndrome is a condition characterized by a constellation of morphological malformations affecting the left side of the heart. We studied the capillary network, and quantified the capillarization of the ventricular myocardium, which, if different from normal, may have implications for the success of surgical reconstruction.
Methods:
The capillaries were detected by immunohistochemistry using a monoclonal antibody (von Willebrand's factor) against the endothelium. Hearts with hypoplastic left heart syndrome have higher mean and maximal diffusion distances from any arbitrary point to the nearest capillary than normal hearts.
Results:
There was no significant difference in the heterogeneity of capillary distribution between the hearts with hypoplastic left heart syndrome and the control heart. Increase in distance was found in both the right and left ventricles.
Conclusions:
Hearts with hypoplastic left heart syndrome show a reduction in the capillarization of both the right and left ventricles compared with age-matched controls. We believe this may be an inherent abnormality of hypoplastic left heart syndrome that may have implications for ventricular development.
