Anesthetic Efficacy of PECS II Block and Parasternal Block

The Pecs II block will be performed under ultrasound guidance, at fourth rib level, on the axillary line, into the fascial plane between pectoralis minor muscle and serratus muscle. The parasternal block will be performed under ultrasound guidance, at the second and fourth intercostal space, between the pectoralis major muscle and the intercostal muscles, near to the external intercostal membrane.