Semiclassical inverse spectral problem for seismic surface waves in isotropic media: part I. Love waves (original) (raw)

Introduction: Several studies have demonstrated better outcomes for carotid endarterectomy (CEA) at high-volume hospitals and providers. However, only a few studies have reported the effect of surgeons' specialty and volume on the perioperative outcome of CEA. Methods: This is a retrospective analysis of prospectively collected CEA data during a recent 2-year period. Surgeons' specialties were classified according to their board specialties into general surgeons (GS), cardiothoracic (CT), and vascular surgeons (VS). Surgeons' annual volume was categorized into low volume (Ͻ10 CEAs), medium volume (10 to Ͻ30 CEAs), and high volume (Ն30 CEAs). The primary outcome was 30-day perioperative stroke or death, or both. Other perioperative complications were analyzed. Univariate and multivariate analyses were done to predict the effect of specialty/volume and any other patient risk factors on stroke outcome. Results: A total of 953 CEAs were performed by 24 surgeons: 122 by 7 GS, 383 by 13 CT, and 448 by 4 VS. Patients' demographics and clinical JOURNAL OF VASCULAR SURGERY