title: Side-branch occlusion with directional coronary atherectomy: incidence and risk factors.
abstract: Side-branch occlusion is a recognized complication of directional coronary atherectomy (DCA). To evaluate the incidence, risk factors, and clinical outcome of side-branch compromise, we analyzed our first 100 consecutive atherectomies of native coronary arteries. Seventy-eight patients had 122 side branches at risk, 21 (17%) of which demonstrated compromised flow after DCA. Origin of the side branch from the culprit atheroma and preexisting side-branch ostial stenosis were highly predictive of this complication in 20 of 55 (p < 0.05) and 14 of 31 (p < 0.05) lesions, respectively. There was one non-Q-wave myocardial infarction, no emergency surgeries, and no deaths. In conclusion, side-branch loss after DCA occurs with a frequency similar to balloon angioplasty and was well tolerated in our patient population. Side branches that originate directly from culprit lesions or that have significant ostial narrowing have a higher incidence of this complication.
authors.affiliation: Cardiology Service, Brooke Army Medical Center, Fort Sam Houston, TX 78234-6200.
authors.forename: M A
authors.initials: MA
authors.lastname: Campos-Esteve
authors.forename: J R
authors.initials: JR
authors.lastname: Laird
authors.forename: W M
authors.initials: WM
authors.lastname: Kufs
authors.forename: D C
authors.initials: DC
authors.lastname: Wortham
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D017225:Atherectomy, Coronary / Q000009:adverse effects*; D015331:Cohort Studies; D017023:Coronary Angiography; D003327:Coronary Disease / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D003331:Coronary Vessels; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D012307:Risk Factors