Complete transcatheter correction of variant scimitar syndrome-a case report.

Background: Scimitar syndrome (SS) comprises of an anomalously draining right pulmonary vein (APV), to the inferior vena cava (IVC), maldevelopment of the right pulmonary artery (RPA), and the right lung, with variable number of aorto-pulmonary collaterals (APC) to the right lung. It can cause pulmonary hypertension if left untreated. Surgical correction is the method of choice. We report a case of variant SS with dual drainage of the APV to the IVC and left atrium (LA) that was addressed with a transcatheter approach. Case summary: A 13-year-old child was evaluated for dyspnoea. Chest x-ray and transthoracic echo (TTE) were suggestive of SS with an additional central atrial septal defect (ASD). Cardiac computed tomography (CT) revealed dual drainage of the APV to the IVC and via a meandering vein to the LA and three APCs. The ASD was closed, and the APCs were coiled. The connection of the APV to the IVC was closed with a device, rerouting the pulmonary vein blood to the LA. The child is doing well on follow-up after 2 years. Discussion: Variant forms of SS are rare. Our case had ASD, multiple APCs, well-developed RPA and right lung and a dual drainage of the APV. This allowed for transcatheter management. Otherwise, surgery is the default choice. Multimodality imaging with TTE, CT, magnetic resonance imaging, and cardiac catheterization will help in diagnosis and anatomical delineation.

Thiamine-responsive acute severe pulmonary hypertension in exclusively breastfeeding infants: a prospective observational study.

OBJECTIVES: Severe pulmonary hypertension (PH) causing right heart failure can occur due to thiamine deficiency in exclusively breastfeeding infants. This study describes the clinical profile and management of thiamine-responsive acute pulmonary hypertension. METHODS: A prospective observational study of infants presenting with severe PH without any other significant heart or lung disease. History of symptoms, clinical examination, echocardiography and basic investigations were performed. Dietary patterns of mothers were recorded. Thiamine was administered and serial echocardiography was performed. RESULTS: A total of 250 infants had severe PH and 231 infants responded to thiamine. The mean age was 3.2±1.2 months. Fast breathing, poor feeding, vomiting and aphonia were the main symptoms. Tachypnoea, tachycardia and hepatomegaly were found on examination. Echocardiogram revealed grossly dilated right heart with severe PH. Intravenous thiamine was administered to all the babies based on clinical suspicion. Clinical improvement with complete resolution of PH was noticed within 24-48 hours. Babies were followed up to a maximum of 60 months with no recurrence of PH. All the mothers consumed polished rice and followed postpartum food restriction. CONCLUSION: Thiamine deficiency is still prevalent in selected parts of India. It can cause life-threatening PH in exclusively breastfeeding infants of mothers who are on a restricted diet predominantly consisting of polished rice. It can contribute to infant mortality. Thiamine administration based on clinical suspicion leads to remarkable recovery. High degree of awareness and thiamine supplementation in relevant geographical areas is required to tackle this fatal disease.

Spectrum of cyanotic congenital heart disease diagnosed by echocardiographic evaluation in patients attending paediatric cardiology clinic of a tertiary cardiac care centre.

BACKGROUND: Cyanotic CHD comprises up to 25% of cases of all causes of CHD. RATIONALE: There is lack of data about the present spectrum of congenital cyanotic heart disease in the paediatric age group. OBJECTIVE: The present study was undertaken to determine the spectrum of patients with congenital cyanotic heart disease in the paediatric age group in tertiary paediatric cardiac care clinic. DESIGN: Prospective observational study. SETTING: Paediatric cardiac clinic of a tertiary cardiac care centre. METHODS: All children aged 0-18 years with suspected cyanotic CHD were provisionally included in this study. They underwent a thorough echocardiographic evaluation, and those patients who had definitive diagnosis of congenital cyanotic heart disease were included for final analysis. RESULTS: A total of 119 children met the inclusion criteria. Tetralogy of Fallot and its variant were the most common congenital cyanotic heart disease with proportion of about 44%. Other common malformations were double outlet right ventricle (14%), pulmonary atresia with ventricular septal defect (8%), total anomalous pulmonary venous connection (7%), d-transposition of the great arteries (9%), tricuspid valve anomalies--tricuspid atresia and Ebstein's anomaly--hypoplastic left-heart syndrome, truncus arteriosus, and complex CHD such as single ventricle. CONCLUSION: Tetralogy of Fallot and its variants were the most common cyanotic heart disease diagnosed in our patients. As there were a significant proportion of cases with complex cyanotic CHD, paediatric cardiologists should be familiar with the diagnosis and management of all these complex congenital malformations of the heart.