Retrograde versus antegrade delivery of cardioplegic solution in myocardial revascularization. A clinical trial in patients with three-vessel coronary artery disease who underwent myocardial revascularization with extensive use of the internal mammary artery. - Noyez,L.; van Son,J.A.; van der Werf,T. (J Thorac Cardiovasc Surg, 1993)