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Chest, Vol 102, 1676-1682, Copyright © 1992 by American College of Chest Physicians

ARTICLES

Acute outcome of directional coronary atherectomy vs standard balloon angioplasty in de novo left anterior descending stenoses

BP Kimball, S Bui, RG Carere, EA Cohen and AG Adelman
Department of Medicine, Toronto Hospital, Ontario, Canada.

To assess the immediate outcome of directional coronary atherectomy (DCA) versus standard balloon angioplasty (PTCA) in de novo left anterior descending coronary stenoses, 25 consecutive atherectomies (22 men, 3 women) performed at The Toronto Hospital, between July 1990 and March 1991 were compared with 25 (14 men, 11 women) temporally matched successful angioplasties. Coronary stenoses were analyzed by quantitative arteriography, using the Coronary Measurement System (Leiden, The Netherlands), with estimation of transstenotic hemodynamics by fluid dynamic equations. Before and after procedure qualitative blood flow (TIMI criteria) was also evaluated, as was intimal haziness and coronary dissection. In comparison to PTCA, coronary atherectomy produced less residual minimum stenotic diameter (DCA, 2.75 +/- 0.55 vs PTCA, 1.70 +/- 0.44 mm, p < 0.001), and relative percent diameter stenosis (DCA, 17.9 +/- 10.7 vs PTCA, 34.4 +/- 10.7 percent, p < 0.001), with less transstenotic obstructive gradient (DCA, 0.2 +/- 0.2 vs PTCA, 1.0 +/- 1.5 mm Hg, p < 0.05), and greater estimated stenotic flow reserve (DCA, 4.86 +/- 0.15 vs PTCA, 4.50 +/- 0.48 x baseline, p < 0.05). Coronary atherectomy "normalized" TIMI flow patterns in virtually all patients (DCA, 2.96 +/- 0.20 vs PTCA, 2.72 +/- 0.45, p < 0.05), while creating less intimal haziness (DCA, 10/25 [40 percent] vs PTCA, 23/25 [92 percent], p < 0.01), and coronary dissection (DCA, 6/25 [24 percent] vs PTCA, 16/25 [64 percent], p < 0.05). Therefore, when compared with standard balloon angioplasty, DCA produces less residual stenosis, better transstenotic hemodynamics, while decreasing the frequency of coronary artery damage, in de novo left anterior descending stenoses.


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A. G. Adelman, E. A. Cohen, B. P. Kimball, R. Bonan, D. R. Ricci, J. G. Webb, L. Laramee, G. Barbeau, M. Traboulsi, B. N. Corbett, et al.
A Comparison of Directional Atherectomy with Balloon Angioplasty for Lesions of the Left Anterior Descending Coronary Artery
N. Engl. J. Med., July 22, 1993; 329(4): 228 - 233.
[Abstract] [Full Text]


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Copyright © 1992 by the American College of Chest Physicians.