title: Is systolic blood pressure recovery after exercise a predictor of mortality?
abstract: BACKGROUND
  An attenuated systolic blood pressure recovery after exercise has been associated with the severity of atherosclerotic heart disease.
  
  
  METHODS
  For 6 years, we observed 12,379 patients who underwent symptom-limited exercise testing. We excluded patients receiving antihypertensive medication and patients with valvular disease, emphysema, end-stage renal disease, heart failure, left ventricular systolic dysfunction, and atrial fibrillation. Blood pressure recovery ratio was defined as the ratio of systolic blood pressure at 3 minutes into recovery to systolic blood pressure at peak exercise; this has been shown to correlate with angiographic severity of coronary disease.
  
  
  RESULTS
  The blood pressure recovery ratios ranged from 0.36 to 1.62, with values for increasing quartiles of 0.72 +/- 0.05, 0.82 +/- 0.02, 0.88 +/- 0.02, and 0.99 +/- 0.07. During follow-up, there were 430 deaths (3%). Five-year Kaplan Meier survival rates were 0.975, 0.974, 0.969, and 0.966 in quartiles 1 to 4, respectively. Compared with patients in the lowest quartile of blood pressure recovery ratio, patients in the highest quartile were at somewhat increased risk (hazard ratio, 1.71; 95% CI, 1.31-2.24; P <.001). However, after adjusting for age, sex, body mass index, resting heart rate and blood pressure, peak systolic blood pressure, heart rate recovery, exercise chronotropic response, cardiac history, and standard risk factors, this association was no longer present (adjusted hazard ratio, 1.05; 95% CI, 0.8-1.38; P =.74).
  
  
  CONCLUSIONS
  In this low-risk population, abnormal systolic blood pressure recovery after exercise was not independently predictive of mortality after correcting for differences in baseline and exercise characteristics.
authors.affiliation: Department of Cardiology, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
authors.forename: Keith
authors.initials: K
authors.lastname: Ellis
authors.forename: Claire E
authors.initials: CE
authors.lastname: Pothier
authors.forename: Eugene H
authors.initials: EH
authors.lastname: Blackstone
authors.forename: Michael S
authors.initials: MS
authors.lastname: Lauer
mesh_terms: D001794:Blood Pressure / Q000502:physiology*; D015986:Confounding Factors, Epidemiologic; D003327:Coronary Disease / Q000401:mortality* / Q000503:physiopathology; D003920:Diabetes Mellitus / Q000503:physiopathology; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011379:Prognosis; D016016:Proportional Hazards Models; D012307:Risk Factors