“…Because of the increasing popularity of this technique, a large number of reports have recently been published (Cooley and Hallman, 1966;Edwards, Mohtashemi, and Holdefer, 1966 ;Waldhausen et al, 1968;Somerville, Yacoub, Ross, and Ross, 1969;Pickering, Trusler, Lipton, and Keith, 1971). CLINICAL MATERIAL We present our experience with 180 patients operated upon during the period 1968-71.…”