investigators chose left SGB being safer with regards conductivity changes when compared to right SGB, in the present study investigators are trying to examine and compare whether coronary reperfusion in patients undergoing coronary artery bypass grafting who were subject to ultrasound guided left Stellate ganglion block (SGB ) performed in the induction of anesthesia could decrease post cardiopulmonary bypass ischemic changes, pulmonary hypertension and right ventricular dysfunction leading to enhanced recovery.~Place of work: Ain shams university hospitals cardiovascular surgery academy, Cairo, Egypt.~Number and selection of participants:~40 participants, 20 in each group (2 groups).
The effects of SGB on the cardiovascular system remain controversial since the cardiac sympathetic nerves pass through the stellate ganglion. SGB is expected to have an ameliorative effect on impaired coronary circulation and cardiac function and thus to be well suited to the treatment of angina pectoris and myocardial infarction