[Stress echocardiography--principles, methodology, results and indications]

Area of Science:

• Cardiology
• Non-invasive diagnostic imaging

Background:

• Conventional exercise testing is a primary tool for coronary artery disease (CAD) evaluation, with approximately 70% diagnostic accuracy.
• Myocardial ischemia can manifest as regional wall motion abnormalities preceding ECG changes or angina.
• Determining the optimal non-invasive test when exercise testing yields non-diagnostic results is crucial.

Purpose of the Study:

• To evaluate the role and diagnostic accuracy of stress echocardiography in assessing coronary artery disease.
• To identify specific patient populations and clinical scenarios where stress echocardiography is the preferred diagnostic modality.
• To highlight the advantages of stress echocardiography over other non-invasive tests.

Main Methods:

• Echocardiography is used to assess regional wall motion abnormalities at rest and during stress (physical or pharmacological).
• Comparison of resting and stress echocardiographic images to detect ischemia-induced wall motion worsening.
• Analysis of diagnostic accuracy in various patient subgroups and clinical indications.

Main Results:

• Stress echocardiography demonstrates a diagnostic accuracy of 85% for coronary artery disease.
• It is particularly useful when resting ECG is abnormal, in cases of left ventricular hypertrophy, or when patients cannot exercise adequately.
• Offers additional data on left ventricular mass, pulmonary pressures, and valvular heart disease.

Conclusions:

• Stress echocardiography is a safe, cost-effective, and accurate non-invasive method for diagnosing and assessing coronary artery disease.
• It serves as a valuable alternative to exercise testing in specific patient groups and clinical situations.
• Its indications are expanding, positioning it as a key diagnostic tool in non-invasive cardiology.