Operative outcomes of infantile hypertrophic pyloric stenosis in patients with congenital heart disease.

Purpose: This study aims to compare the outcomes of pyloromyotomy for infantile hypertrophic pyloric stenosis (IHPS) in children with and without congenital heart disease (CHD).

Methods: A retrospective, single pediatric center, case-control, matched cohort study was performed over 10years. A case of IHPS with CHD was paired with control patients of IHPS without CHD, matched by age and gender. Perioperative morbidity, 30-day mortality, length of hospital stay, and hospital cost were compared. Subgroups were analyzed based on the severity of CHD and the reason for admission.

Results: Twenty-six patients who underwent pyloromyotomy for IHPS with CHD (CHD group) were matched with 78 patients with IHPS without CHD (Non-CHD group). No 30-day mortality was identified in either group. Overall perioperative complications were not significantly different between groups (11.5% vs 5.2%, p=0.163). However, postoperative length of stay was longer in CHD group (6 vs 1days, p<0.001) and any subgroups of CHD as compared to Non-CHD group. CHD group patients admitted only for IHPS had short postoperative LOS, whereas those who developed pyloric stenosis during a hospital admission stayed longer postoperatively (1.5 vs 26.5days, p<0.001). Mean hospital costs in patients admitted for IHPS were $16,270 and $3591 for CHD group and Non-CHD group, respectively (p<0.001).

Conclusions: IHPS patients with CHD have prolonged postpyloromyotomy course, especially when inpatients with CHD incidentally develop IHPS.