Mid-term postoperative outcome results in PE patients after undergoing left Video-Assisted Thoracoscopic Surgery for the NUSS Procedure: From 2015 to 2018, 308 patients with pectus excavatum underwent video-assisted thoracoscopy in left-to-right Nuss procedure at Centre of Cardiovascular and Thoracic surgery in Viet Duc Hospital: age ranged from 5 - 24 years old (mean ± standard deviation: 15.44 ± 3.14 years old); male / female ratio: 6/1; Moderate pectus excavatum accounted to 24, 03% of our study cohort; rate of severe pectus excavatum was 54, 78%; rate of mild pectus excavatum was 21, 10%; mean operating time was 48, 16±15, 55 minutes (20 - 40 ms); mean length of stay after surgery was 5, 18±1, 65 days (1 - 13ds).