Epidemiological Study of Congenital Heart Disease S.L. C h a d h a , 1 N e e r p a l S i n g h 1 a n d D.K. S h u k l a 2 1Sitaram Bhartia Institute of Science & Research, 2ICMR, New Delhi, India Abstract. A community based survey of congenital heart disease was carried out on a random sample of 11833 children below 15 years in Delhi, India. Congenital heart disease was diagnosed on clinical history and/or clinical examination. Out of the examined sample, 50 were found suffering from congenital heart disease, giving an overall prevalence of 4.2/1000 (4.6/1000 in boys and 3.7/1000 in girls). The prevalence rate was slightly higher than other studies carded out in the country. The reason is obvious. The present study is community based while other studies were hospital or school based. The type of lesions were similar to those reported from other studies. The lesions in order of frequency were ventricular septal defect (46%), atrial septal defect (18%), patent ductus arteriosus (14%), Fallot's tetrology (10%), aortic stenosis (4%), and pulmonary stenosis (4%). Like other studies ventricular septal defect was the commonest lesion. The prevalence rate was higher in the age group 0-4 years and 5-9 years in boys whereas it was higher in adolescent age group (10-14 years) in girls. [Indian J Pedlatr 2001; 68 (6) : 507-510] Key wordB : Congenital weart disease; Children below 15 years; Prevalence Until 1930 it was believed that rheumatic heart disease w a s the m o s t c o m m o n f o r m of h e a r t disease in children. 1 Within recent years, the statistics in m o s t cardiac centres h a v e s h o w n that congenital h e a r t disease is the more c o m m o n of the two. Many cases of congenital h e a r t disease die d u r i n g infancy a n d in some children, the disease does not manifest in the first few years of life, emphasizing the need to establish the prevalence of this disease. The congenital heart disease has been the subject of i n n u m e r a b l e studies b o t h as regards prevalence a n d clinical features in western countries. The few studies carried o u t in I n d i a w e r e either h o s p i t a l or school based and they did not indicate the m a g n i t u d e of the p r o b l e m . It w a s , t h e r e f o r e , d e c i d e d t o c a r r y o u t c o m m u n i t y b a s e d e p i d e m i o l o g i c a l s t u d y for t h e prevalence of the disease. MATERIALS AND METHODS The c o m m u n i t y based study was conducted by house to h o u s e s u r v e y in 1985-87 in a r a n d o m l y selected sample of urban population of Union Territory of Delhi e x c l u d i n g Najafgarh a n d Narela zones w h i c h are considered semi-urban as they have bulk of villages. Reprint requests : D~ S.L. Chadha, Consultant, Community Health Consultant, Sitaram Bhartia Institute of Science & Re- search, B-16, Mehrauli Institutional Area, New Delhi-110016. E-mail ...