RESUMO
BACKGROUND: To avoid lead failure and pocket infection in neonates and infants requiring pacemakers, we used the axillary approach of placing the generator in the axilla and the leads in the intrathoracic space. We describe the technical details of the axillary approach and evaluate the efficacy of this method. METHODS: We assessed 21 patients (7 male) weighing 8 kg or less who underwent epicardial pacemaker implantation with the axillary approach between 2004 and 2018. The axillary approach entails (1) positioning the pacemaker generator in the axilla to avoid local skin and pocket complications due to tissue compression by the generator, and (2) making a double loop in the pleural space to reduce stress on the pacemaker leads caused by somatic growth. This approach can be combined with median sternotomy for simultaneous intracardiac repair. RESULTS: The patients' median age at pacemaker implantation was 6 months; 16 patients (76%) were aged less than 12 months. The median body weight was 4.5 kg (interquartile range, 3 to 7). In all 5 patients requiring simultaneous cardiac repair, a median sternotomy was performed to access the heart. Sixteen patients required only pacemaker implantation: left thoracotomy was performed in 10 patients, right thoracotomy in 5, and subxiphoid approach in 1. The 5-year and 10-year freedom from pacemaker-related adverse events was 89.4% and 79.5%, respectively. CONCLUSIONS: The axillary approach using intrathoracic double-loop routing of leads to position the generator in the axilla for pacemaker implantation can be a valuable alternative for neonates/infants weighing 8 kg or less with or without complex congenital heart disease.
