Noninvasive functional assessment of left internal mammary artery grafts by transcutaneous Doppler echocardiography. - Rombout,E.; Vantrimpont,P.; Gurne,O.; Chenu,P.; Schroeder,E.; Buche,M.; Louagie,Y.; Eucher,P.; Marchandise,B. (J Am Soc Echocardiogr, 1998)