Symptomatic atrial septal defect in infancy
N C Joshi1, R Dalvi, R H Merchant
1Cardiology Clinic, B.J. Wadia Hospital for Children, Parel, Bombay.
Insights
Severe congestive heart failure in infants can be caused by isolated ostium secundum atrial septal defect (OS-ASD). Many infants with OS-ASD presented atypically, but most responded well to medical treatment.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Isolated ostium secundum atrial septal defect (OS-ASD) is a congenital heart defect that can rarely cause severe symptoms in infants.
- Congestive heart failure in infants due to OS-ASD is uncommon and may present with atypical clinical findings.
Purpose of the Study:
- To outline the echocardiographic findings, clinical course, and outcomes of infants admitted with severe congestive heart failure and isolated OS-ASD.
- To investigate the diagnostic challenges and treatment responses in this specific pediatric population.
Main Methods:
- Retrospective review of 12 infants with severe congestive heart failure and isolated OS-ASD over a four-year period.
- Analysis of echocardiographic data, clinical presentation, treatment interventions, and patient outcomes.
Main Results:
- All 12 infants presented with atypical findings, including a parasternal holosystolic murmur and absence of wide fixed splitting of the second heart sound, leading to no initial clinical suspicion of ASD.
- M-mode echocardiography revealed increased right ventricular distensibility in the absence of pulmonary hypertension.
- Ten infants responded well to medical decongestive therapy; two underwent successful surgical closure, and two showed spontaneous closure.
Conclusions:
- Isolated OS-ASD can present atypically in infants with severe congestive heart failure.
- Early medical management is effective for most infants, with surgical or spontaneous closure being viable options for non-responders or specific cases.
Abstract:
Isolated ostium secundum atrial septal defect (OS-ASD) may rarely lead to severe symptoms in infancy. Over a period of four years, 12 infants admitted to our hospital with severe congestive heart failure had an isolated OS-ASD. Their echocardiographic findings, clinical course, and outcome were outlined. All 12 infants had atypical findings including a holosystolic murmur parasternally and absence of wide fixed splitting of the second heart sound, and none were clinically suspected to have an ASD. M-mode echocardiography in all infants showed a greater than normal diastolic right ventricular internal diameter in the absence of pulmonary hypertension, indicating an increased right ventricular distensibility. Ten out of 12 infants responded well to medical decongestive treatment, and none developed pulmonary hypertension. Two infants who failed to improve with drugs, successfully underwent surgical closure, while two other infants revealed clinical and echocardiographic evidence of spontaneous closure.
Related Concept Videos
Development of the Heart
As the embryo undergoes lateral folding, these paired tubes approach each other, merging into a single primitive heart tube by...
Mitral Regurgitation I: Introduction
Mitral Stenosis I: Introduction
Mitral Stenosis II: Clinical features and Diagnostic Tests
Aortic Regurgitation II: Clinical Features and Diagnostic Tests
Rheumatic Heart Disease I: Introduction


