[Prognostication of the course of stable ischemic heart disease by exercise stress echocardiography]

Area of Science:

• Cardiology
• Diagnostic Imaging
• Clinical Prognostics

Background:

• Ischemic heart disease poses significant mortality and morbidity risks.
• Accurate prognostic tools are crucial for guiding patient management.
• Stress echocardiography is a widely used diagnostic modality.

Purpose of the Study:

• To evaluate the prognostic power of exercise stress echocardiography in patients with ischemic heart disease.
• To identify clinical and instrumental predictors of adverse cardiac events.

Main Methods:

• Analysis of data from 549 patients (450 high, 99 low pretest probability of ischemic events).
• Prospective observation for 12-42 months.
• Cox proportional hazards model used to assess relationships between data and events (death, nonfatal myocardial infarction, revascularization).

Main Results:

• One-year risk of cardiac death and nonfatal myocardial infarction was 3% and 15% for negative and positive stress echocardiography results, respectively.
• Event-free survival at one year was 95% (negative) vs. 66% (positive).
• Short test duration (<6 min) and local contractility disturbances predicted major events; LVH, METs, angina, and hypertension predicted combined endpoints.

Conclusions:

• Exercise stress echocardiography demonstrates high prognostic power in patients with ischemic heart disease.
• Specific findings during stress echocardiography can predict adverse cardiac outcomes.
• Test duration and regional wall motion abnormalities are key prognostic indicators.