Left Ventricular Dysfunction Post-surgical Patent Ductus Arteriosus Ligation in Children: Predictor Factors Analysis

Methods:

Study population Fifty children with PDA, for whom surgical PDA ligation was done from June 2015 to June 2018. All cases were operated in cardiothoracic surgery department and were followed up by cardiothoracic surgeons and paediatricians at cardiac surgery ICU, Qena University Hospital. Their mean age at intervention was 15.78 ± 7.58 months, body surface area (BSA) 0.43±0.03 and 32 (72%) were females. The mean duct diameter was 4.08 ± 1.25 mm. The study conforms to the ethical standards of the Helsinki Declaration and approval was obtained from the institutional ethics committee of Qena Faculty of Medicine.

Surgical technique PDA ligation was performed under general anaesthesia after pre-operative anaesthetic evaluation. After single endotracheal tube anaesthesia induction; children were placed on the right lateral recumbent position fixed with adhesive plaster and a pad under the chest, the left arm raised above the head. A left mini-thoracotomy incision is done parallel to the medial border of the scapula and entrance to the thoracic cavity was via the third or fourth intercostal space. Cautiously, the ductus is identified and dissected carefully. Then it was doubly ligated with silk ligature (2/0 or 0). An intercostal tube inserted during operation and removed within 48 hours if no drainage presents.

Descriptive statistical analysis Data were arranged and analyzed utilizing Version 20 of the SPSS program (Statistical Package for Social Sciences). Continuous variables were compared using the Student paired t-test and are expressed as mean values ± standard deviation. Pearson Chi-Square tests were used to detect differences among groups for categorical variables. The relationship between PDA size and changes in echocardiographic parameters was verified using the Pearson linear correlation and the linear regression analysis. P-value of <0.05 was considered of significance.

Inclusion criteria

• All cases had clinical as well as echocardiographic proof of hemodynamically critical PDA.

Exclusion criteria

• Patients with silent PDA.
• irreversible pulmonary vascular disease.
• those who had associated hemodynamically significant congenital heart disease (CHD).