Characteristics and outcomes of patients with abnormal stress echocardiograms and angiographically mild coronary artery disease ( <50% stenoses) or normal coronary arteries

J Am Soc Echocardiogr. 2010 Feb;23(2):207-14. doi: 10.1016/j.echo.2009.11.023.

Abstract

Background: Abnormal cardiac stress imaging findings are not always associated with angiographically significant coronary artery disease. The outcomes of patients with such false-positive findings have not been extensively examined. The aim of this retrospective study was to describe the characteristics and outcomes of patients with abnormal stress echocardiographic findings who had false-positive results compared with those who had true-positive results.

Methods: Of 1,477 consecutive patients (mean age, 66 +/- 12 years; 61% men) with abnormal stress echocardiographic findings who underwent coronary arteriography within 30 days, death from any cause was ascertained.

Results: At coronary arteriography, 997 patients (67.5%) had true-positive results, defined by the presence of angiographically significant coronary artery disease (> or = 50% stenoses), and 480 (32.5%) had false-positive results, defined by <50% stenoses or normal coronary arteries. Of the subgroup of patients with markedly abnormal stress echocardiographic findings (n = 605), 28% had <50% stenoses or normal coronary arteries. During an average follow-up period of 2.4 +/- 1.0 years, there were 140 deaths. The adjusted likelihood of subsequent death for patients with <50% stenoses compared to patients with > or = 50% stenoses after abnormal stress echocardiography was 1.05 (95% confidence interval, 0.86-1.31; P = .62).

Conclusions: A sizable proportion of patients with abnormal stress echocardiographic results who are referred for coronary angiography have false-positive findings. The outcomes of patients with false-positive results were similar to those of patients with true-positive results. This finding suggests that patients with false-positive results on stress echocardiography should still receive intensive risk factor management and careful clinical follow-up.

Publication types

  • Comparative Study

MeSH terms

  • Aged
  • Coronary Angiography / statistics & numerical data*
  • Coronary Artery Disease / diagnosis*
  • Coronary Artery Disease / mortality*
  • Echocardiography / statistics & numerical data*
  • Exercise Test / statistics & numerical data*
  • False Positive Reactions
  • Female
  • Humans
  • Male
  • Middle Aged
  • Minnesota
  • Outcome Assessment, Health Care
  • Prevalence
  • Prognosis
  • Reproducibility of Results
  • Risk Assessment
  • Risk Factors
  • Sensitivity and Specificity
  • Survival Analysis
  • Survival Rate