Abstract
Hypoplastic left heart syndrome (HLHS) is a rare developmental abnormality of the left-sided heart structures which accounts for 3.8% of congenital cardiac malformations. It comprises a range of defects characterized by a single functional ventricle belonging either to the left or to the right heart complex. A common presentation of HLHS is a small or non-existent left ventricle, stenosis of aortic and mitral valve, and hypoplastic ascending aorta. The circulation is achieved by way of the pulmonary artery which supplies the lungs and the systemic circulation via the ductus arteriosus. In this chapter, the history of staged surgical repair leading to separation of pulmonary and systemic circulations to staged Fontan palliation is reviewed. The success of this procedure attests to the remarkable plasticity of the cardiovascular system and exemplifies the ram-like, flow-restraining function of the heart. How a single, often weakened ventricle can push the blood through the combined resistance of the systemic and pulmonary circulations, as well as the added resistance of the Fontan anastomosis, remains an open question for the pressure-propulsion model.
In whatsoever creature there is lungs, there is likewise in them two ventricles, the right and the left.
William Harvey (1628)
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Furst, B. (2020). Single Ventricle Physiology. In: The Heart and Circulation. Springer, Cham. https://doi.org/10.1007/978-3-030-25062-1_20
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DOI: https://doi.org/10.1007/978-3-030-25062-1_20
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