Background:shunt lesions (left-to-right) consider the most popular congenital cardiac anomalies in pediatrics and they are the most common cause of high-cardiac- output heart failure. Lung ultrasound (LUS) is increasing in its popularity for the diagnosis of pulmonary complications with pediatric cardiovascular and congenital heart diseases lung ultrasound outperforms the diagnostic accuracy of the chest radiograph, with a low-cost, portable, real-time, radiation-free method.
Aim and objectives: to differentiate between lung congestion and lung infection using lung ultrasound in congenital heart diseases with significant left to right shunt and comparing the ultrasound findings with x-ray findings.
Subjects and methods:This observational case study that was conducted on children and adolescents with significant left to right shunt during the period from the first of December 2022 to the end of September 2023 from pediatric cardiology Unit, Menoufia University Hospitals. The study was involved 50 cases.
Results: There was a statistically significant difference between the studied population regarding Pearson's correlation coefficients (r) between Lung ultrasound findings and X-ray findings regarding lung congestion and between Lung ultrasound findings and X-ray findings regarding lung infection. There was no statistical difference between ASD,VSD and PDA regarding increased broncho vascular markings and lung infection.
 
Conclusion: Lung ultrasound (LUS) could be accurate, sensitive and efficient. It was used to differentiate between lung congestion and lung infection in congenital heart diseases with significant left to right shunt.
 
Keywords: lung congestion, lung infection, congenital heart diseases, left to right shunt