PT  - JOURNAL ARTICLE
AU  - N. Ishizaka
AU  - Y. Ishizaka
AU  - Y. Ikari
AU  - T. Isshiki
AU  - T. Tamura
AU  - H. Suma
AU  - T. Yamaguchi
TI  - Initial and subsequent angiographic outcome of percutaneous transluminal angioplasty performed on internal mammary artery grafts.
AID  - 10.1136/hrt.74.6.615
DP  - 1995 Dec 01
TA  - British Heart Journal
PG  - 615--619
VI  - 74
IP  - 6
4099  - http://heart.bmj.com/content/74/6/615.short
4100  - http://heart.bmj.com/content/74/6/615.full
SO  - Heart1995 Dec 01; 74
AB  - OBJECTIVE--To estimate the initial outcome and incidence of restenosis of angioplasty of internal mammary artery grafts in a retrospective study. METHODS--The study population consisted of 46 patients (48 lesions) who underwent first balloon angioplasty within the internal mammary artery graft. Most (37/48) were at the distal anastomosis. A few (8/48) were in the graft body. Six patients with the evidence of angiographic restenosis underwent a second angioplasty. RESULTS--The success rate and the restenosis rate of the first angioplasty was 73% and 30% respectively. Of the 34 patients (35 lesions) with a successful first angioplasty, 30 underwent follow up angiography with a restenosis rate of 30% (9/30). A second angioplasty was performed on six of the nine restenotic lesions, with a success rate of 83% and no restenoses. The percent diameter stenosis of the recipient native coronary artery was significantly greater in the restenosis group, at 75 (SD 27)% v 89 (17)%, p < 0.05. CONCLUSIONS--First angioplasty of 46 patients (48 lesions) within an internal mammary artery graft was performed with a success rate of 73% and a restenosis rate of 30% (follow up rate of 88%). The extent of the stenosis of the recipient native coronary artery may affect the restenosis rate.