Clinical, Microbiological and Radiological Characterises of Lower Respiratory tract Infection in Children with Established Congenital Heart Diseases.

Acute Lower Respiratory Tract Infection (ALRTI) is the most common cause of deathin children under five. Various demographic, socio-economic and environmental factors have beenassociated with ALRTI, with conflicting results. Children with congenital heart diseases are morevulnerable to lower respiratory tract infections following the fact that they had an anatomical defectthat causes hemodynamic disturbance of lung circulation and mucosal oedema finally leads todecreased lung compliance and recurrent lower respiratory tract infections. Methods: Children agedbetween1 month and 18 years with clinically established congenital heart disease confirmed byechocardiography and presenting with signs and symptoms suggestive of lower respiratory tractinfection were enrolled in the study. A detailed history was taken and routine blood investigationswere done in all cases. Chest X-Ray was done to confirm the clinical diagnosis. Results: Mean ageof the study subjects was 2 years. VSD was seen in 64.9% of cases while 10.5% of cases had VSDand ASD. The most common presenting symptoms were: cough (98.2%), reduced feeding (97.4%),fever (89.5%), running nose (67.5%) and wheeze (49.1%). Leucocytosis and raised ESR were seenin 66.7% and 64.9% cases respectively. In Throat swab Commensals were seen in 36% of caseswhile gram-positive cocci were seen in 3.5% cases respectively. In blood culture Streptococcuspneumoniae being the commonest organism isolated. Bilateral and unilateral opacities on chest x-ray were seen in 16.7% and 12.3% cases respectively. Conclusion: Bronchopneumonia was thecommonest LRTI in children with the predominance of VSD.