In a 60 month period (January 1981 to December 1985), 82 patients (79% male with a mean age of 60 years) had 83 saphenous vein grafts and 5 internal mammary artery grafts with a total of 101 stenotic sites treated with percutaneous transluminal coronary angioplasty. The mean time between bypass surgery and angioplasty was 51.2 months. The procedure was technically successful in 85% of patients, 86% of grafts and 85% of the sites attempted. In these cases, the mean diameter stenosis was reduced from 77 +/- 14 to 27 +/- 20% (p less than 0.001), the mean pressure gradient from 49 +/- 16 to 7 +/- 6 mm Hg (p less than 0.001). Emergency coronary artery bypass graft surgery was necessary in one patient (1.2%) whereas myocardial infarction occurred in three patients (3.6%). There were no hospital deaths. Clinical follow-up was obtained in all 82 patients. Before angioplasty, 23% were in Canadian Cardiovascular Society functional class II, 60% in class III and 17% in class IV. With a mean clinical follow-up period of 21.4 +/- 2.3 months, 71% are in class I, 17% in class II and 12% in class III. There were two deaths, 3 months or more after angioplasty, one probably due to graft closure. So far, angiographic follow-up (at 7.9 +/- 2.1 months) has been available in 26 patients. Ten patients (with 10 grafts) exhibited graft restenosis; six of them have had second successful repeat angioplasty. Among the many variables analyzed, statistically significant predictors of success were a higher measured balloon/graft ratio (p less than 0.001), smaller diameter graft (p less than 0.001), and shorter lesion length (p less than 0.01). The only predictor of complication was diffuseness of disease in the graft (p less than 0.05). The statistically significant predictors of recurrence were the residual stenosis after the initial angioplasty (p less than 0.01) and the measured balloon/graft ratio (p less than 0.01). Angioplasty of coronary artery grafts appears to be a feasible and efficacious procedure with a low complication rate. The technique is a satisfactory alternative to repeat surgery in selected patients.
Percutaneous transluminal angioplasty of stenotic coronary artery bypass grafts: 5 years' experience.
Gilles Côté,R. Myler,S. Stertzer,D. Clark,J. Fishman‐Rosen,Murphy Mc,Richard E. Shaw
Published 1987 in Journal of the American College of Cardiology
ABSTRACT
PUBLICATION RECORD
- Publication year
1987
- Venue
Journal of the American College of Cardiology
- Publication date
Unknown publication date
- Fields of study
Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- balloon/graft ratio
The measured ratio comparing the balloon diameter to the graft diameter during angioplasty.
Aliases: measured balloon/graft ratio
- coronary artery bypass grafts
Saphenous vein or internal mammary artery grafts used to bypass blocked coronary arteries.
Aliases: CABG grafts, bypass grafts
- diffuseness of disease in the graft
The extent to which a bypass graft has widespread or diffuse atherosclerotic involvement.
Aliases: diffuse graft disease
- graft restenosis
Recurrent narrowing of a treated bypass graft after an initially successful angioplasty.
Aliases: restenosis
- percutaneous transluminal coronary angioplasty
A catheter-based balloon procedure used to widen narrowed coronary vessel segments.
Aliases: PTCA, angioplasty
- residual stenosis after initial angioplasty
The remaining narrowing in the treated graft segment after the first angioplasty attempt.
Aliases: residual stenosis
- shorter lesion length
A lesion characteristic referring to a shorter treated stenotic segment within the graft.
Aliases: short lesion length
- smaller graft diameter
A graft size characteristic referring to narrower bypass grafts treated in the procedure.
Aliases: smaller diameter graft
- technical success
The procedure outcome category indicating successful treatment of the targeted stenotic site, graft, or patient.
Aliases: procedural success
REFERENCES
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