title: Outcomes of surgical aortic valve replacement for severe aortic stenosis: Incorporation of left ventricular systolic function and stroke volume index.
abstract: OBJECTIVE
  We sought to assess predictors of mortality in consecutive patients with severe aortic stenosis undergoing aortic valve replacement and to determine whether there are differences in mortality, separated on the basis of different aortic stenosis subtypes and left ventricular stroke volume index.
  
  
  METHODS
  We studied 875 patients (aged 69 ± 12 years, 67% were men) with severe aortic stenosis (aortic valve area ≤ 1 cm(2)) who underwent aortic valve replacement between January 2007 and December 2008 (excluding other severe valve disease, balloon aortic valvuloplasty, and transcatheter aortic valve replacement). Clinical and echocardiographic data were recorded. Left ventricular stroke volume index was measured as left ventricular outflow tract velocity time integral × left ventricular outflow tract area/body surface area. Patients were classified into the following subtypes: (1) standard severe (n = 536, left ventricular ejection fraction ≥ 50% and mean gradient ≥ 40 mm Hg); (2) paradoxic severe (n = 152, left ventricular ejection fraction ≥ 50%, mean gradient <40 mm Hg and left ventricular stroke volume index <35 mL/m(2)); and (3) low left ventricular ejection fraction severe (n = 187, ejection fraction <50%). Society of Thoracic Surgeons score and all-cause mortality were recorded.
  
  
  RESULTS
  At 4.8 ± 2 years, 153 patients (18%) died (30-day mortality 1.8%). On multivariable Cox analysis, age (hazard ratio [HR], 1.49), New York Heart Association class (HR, 1.52), prior cardiac surgery (HR, 1.41), aortic stenosis subtypes (standard severe reference HR, 1; paradoxic severe HR, 1.48; and low left ventricular ejection fraction severe HR, 2.03), and reduced glomerular filtration rate (HR, 1.17) were associated with higher long-term mortality (P < .05).
  
  
  CONCLUSIONS
  In patients with severe aortic stenosis undergoing aortic valve replacement, patients with standard severe aortic stenosis had better long-term survival than those with paradoxic severe or low left ventricular ejection fraction severe aortic stenosis.
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Roosha
authors: R
authors: Parikh
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Andrew L
authors: AL
authors: Goodman
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Tyler
authors: T
authors: Barr
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Joseph F
authors: JF
authors: Sabik
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Lars G
authors: LG
authors: Svensson
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Luis Leonardo
authors: LL
authors: Rodriguez
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Bruce W
authors: BW
authors: Lytle
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Richard A
authors: RA
authors: Grimm
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.
authors: Brian P
authors: BP
authors: Griffin
authors: Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio. Electronic address: desaim2@ccf.org.
authors: Milind Y
authors: MY
authors: Desai
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000175:diagnosis / Q000401:mortality / Q000503:physiopathology / Q000601:surgery*; D016009:Chi-Square Distribution; D005260:Female; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation / Q000401:mortality*; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009820:Ohio; D011183:Postoperative Complications / Q000401:mortality; D016016:Proportional Hazards Models; D020127:Recovery of Function; D012307:Risk Factors; D012720:Severity of Illness Index; D013318:Stroke Volume; D013599:Systole; D062606:Tertiary Care Centers; D013997:Time Factors; D016896:Treatment Outcome; D014463:Ultrasonography; D016277:Ventricular Function, Left
keywords: aortic stenosis; aortic valve replacement; echocardiography; outcomes