Fig. 5From: Fascial plane blocks for cardiothoracic surgery: a narrative review A PECS 1 before injection of local anesthetic. B PECS 1 after injection of local anesthetic, which spreads into the fascial layers between pectoral major and minor muscles. PMM, pectoralis major muscle; PMm, pectoralis minor muscle; N, needle; LA, local anestheticBack to article page