Service de Chirurgie Cardiaque, Thoracique et Vasculaire, CHU Hospital de la Cavale Blanche, 29609 Brest, France
Objective: A new surgical technique of
coronary artery angioplasty
for diffuse and extensive lesions of the left anterior descending
artery (LAD) is evaluated in this study.
Method:
Ninety-four coronary artery reconstructions (CAR) using a new technique
of angioplasty of the LAD were performed: mean age of patients
was 59 years, there were 21 patients with unstable
angina, and 21 with recent myocardial infarction (MI).
Surgical technique: Diseased LAD is bypassed with the internal thoracic
artery graft (ITA). The anastomosis is made downstream from
the significant proximal lesion of the LAD. A long arteriotomy
(from 2 to 12 cm) is performed along the LAD up to the healthy
arterial wall, followed by coverage with the onlay graft of
ITA in such a fashion as to exclude the plaques from the LAD
lumen. The wall of the new reconstructed LAD consisted of 75%
of ITA and 25% of native LAD. The remaining part of the native
LAD forms a posterior gutter giving the origins of septal and
diagonal branches.
Results: aortic
cross-clamping time was 116
min, operative mortality rate was 3.2% (three patients),
peri-operative infarction rate 6.6% (six patients).
The follow-up was 29 months
(SD=10). Of the 91 survivors,
two were lost for follow-up and one died of non-cardiac causes. Of the 88 patients clinically
evaluated, 81 were free from angina and other cardiac events,
two had new myocardial infarction
in a non-grafted area, two
were in congestive heart failure, and three in angina class
II. Sixty patients underwent angiography. There
were 57 perfect-patency CAR (95%), two ITA string sign (competitive flow), two ITA occlusions
(2.5%)
and no re-stenosis. Conclusions: CAR allows revascularisation
of diffusely diseased LAD with acceptable operative mortality
and morbidity, 2 years good clinical results and graft
patency. In this series, exclusion of plaques prevented plaque
complications.