Prognostic value of dobutamine stress myocardial contrast perfusion echocardiography.

Abstract

BACKGROUND:

Myocardial perfusion (MP) imaging with real-time contrast echocardiography (RTCE) improves the sensitivity of dobutamine stress echocardiography for detecting coronary artery disease. Its prognostic value is unknown. We sought to determine the value of MP and wall motion (WM) analysis during dobutamine stress echocardiography in predicting the outcome of patients with known or suspected coronary artery disease.

METHODS AND RESULTS:

We retrospectively studied 788 patients with RTCE during dobutamine stress echocardiography using intravenous commercially available contrast agents. The incremental prognostic value of MP imaging over clinical risk factors and other echocardiographic data was examined through the use of a log-likelihood test (Cox model). During a median follow-up of 20 months, 75 events (9.6%) occurred (58 deaths, 17 nonfatal myocardial infarctions). Abnormal MP had significant incremental value over clinical factors, resting ejection fraction, and WM responses in predicting events (P<0.001). By multivariate analysis, the independent predictors of death and nonfatal myocardial infarction were resting left ventricular ejection fraction <50% (relative risk [RR], 1.9; 95% CI, 1.2 to 3.2; P=0.01), hypercholesterolemia (RR, 0.5; 95% CI, 0.3 to 0.9; P=0.01), and abnormal MP (RR, 5.2; 95% CI, 3.0 to 9.0; P<0.0001). The 3-year event free survival was 95% for patients with normal WM and MP, 82% for normal WM and abnormal MP, and 68% for abnormal WM and MP.

CONCLUSIONS:

MP imaging during dobutamine stress RTCE provides incremental prognostic information in patients with known or suspected coronary artery disease. Patients with normal MP have a better outcome than patients with normal WM.

• Authors: Jeane M Tsutsui, Abdou Elhendy, James R Anderson, Feng Xie, Anna C McGrain, Thomas R Porter
• Journal: Circulation (Circulation) Vol. 112 Issue 10 Pg. 1444-50 (Sep 06 2005) ISSN: 1524-4539 [Electronic] United States
• PMID: 16129798 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Cardiotonic Agents
• Contrast Media
• Dobutamine

Topics

• Aged
• Cardiotonic Agents
• Contrast Media
• Death, Sudden, Cardiac
• Dobutamine
• Echocardiography, Stress (methods)
• Exercise Test
• Female
• Follow-Up Studies
• Humans
• Male
• Middle Aged
• Myocardial Infarction (diagnostic imaging, mortality)
• Predictive Value of Tests
• Prognosis
• Proportional Hazards Models
• Retrospective Studies
• Sensitivity and Specificity