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Spontaneously Corrected Hypoplastic Left Heart: A Case Report and Exceptional Opportunity to Discuss Etiology with
1Department of Pediatric Cardiology, Besat Hospital, Kurdistan University of Medical Sciences, Sanandaj, Iran.
Insights
Hypoplastic left heart syndrome (HLHS) may stem from flow-related issues. Creating atrial or ventricular septal defects (ASD/VSD) could be a novel treatment for HLHS.
Area of Science:
- Pediatric Cardiology
- Fetal Echocardiography
- Congenital Heart Disease
Background:
- Hypoplastic left heart syndrome (HLHS) is a complex congenital heart defect.
- Both intrinsic and extrinsic factors are implicated in HLHS development.
- Disorders in left ventricular inflow or outflow can lead to hypoplasia.
Observation:
- A case of progressive prenatal left heart hypoplasia with restrictive foramen ovale (FO) was observed.
- Postnatal improvement in hypoplastic left heart was noted with a perimembranous ventricular septal defect (PM-VSD).
Findings:
- The findings suggest a potential flow-mediated extrinsic mechanism in HLHS.
- A restrictive FO points towards flow disruption as a cause.
- A functional PM-VSD supported the extrinsic mechanism hypothesis.
Implications:
- This case offers a new perspective on HLHS etiology and management.
- Interventional creation of ASD or VSD, pre- or postnatally, is proposed for selected HLHS patients.
- This approach may offer a novel therapeutic strategy for HLHS.
Abstract:
Hypoplastic left heart syndrome (HLHS) is a relatively prevalent fetal echocardiography finding in complex congenital heart diseases. Current studies indicate that intrinsic and extrinsic mechanisms could be involved in the development of left heart hypoplasia. Left ventricular inflow or outflow disorders may cause left heart hypoplasia. Prenatal aortic valvuloplasty has become more common as a therapeutic strategy. Our case presentation provides an opportunity for a new vision toward the etiology, prevention, and treatment of HLHS. In our patient, prenatal progressive left heart hypoplasia associated with restrictive foramen oval (FO) suggested the likelihood of a flow-mediated mechanism. Additionally, postnatal improvement of the hypoplastic left heart in the presence of a functional perimembranous ventricular septal defect (PM-VSD) reinforced the suspicion of an extrinsic mechanism. Pre- or postnatal interventional creation of an atrial septal defect (ASD) or VSD is our proposed method for HLHS in selected patients.
