- CV experience. The unique role of PCCM within the Heart Center at CHM is beneficial to the PICU fellows. We work alongside the CV surgery team and provide critical care for the post-op patients alone at night. The surgeons themselves are invested in our fellows' education - - CRRT and bronchoscopy. Whereas most large centers have these procedures run by specialties outside of PCCM, we provide these services for our patients, and our fellows are proficient by the end of their training.