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[Stress echocardiography: methods, indications, clinical application]
A Kopff1, L Markuszewski, L Pawlicki
1Samodzielnej Pracowni Diagnostyki Kardiologicznej I Kliniki Chorób Wewnetrznych Wojskowej Akademii Medycznej w Lodzi.
Insights
Stress echocardiography effectively diagnoses coronary artery disease (CAD) and assesses prognosis by evaluating myocardial ischemia. This non-invasive method uses exercise or pharmacologic stress to detect abnormalities in heart muscle function.
Area of Science:
- Cardiology
- Diagnostic Imaging
Context:
- Coronary artery disease (CAD) diagnosis and risk stratification are crucial in cardiology.
- Stress echocardiography offers a non-invasive approach to assess myocardial ischemia and function.
Purpose:
- To review the current clinical applications and indications of stress echocardiography.
- To evaluate its role in diagnosing, risk stratifying, and determining prognosis in patients with suspected CAD.
Summary:
- Stress echocardiography provokes myocardial ischemia using exercise or pharmacologic agents (e.g., dobutamine, adenosine) to identify regional wall motion abnormalities.
- It assesses myocardial viability and ischemia, with exercise stress testing preferred when feasible, while pharmacologic stress is reserved for specific patient groups.
- The technique analyzes functional changes in myocardial segments supplied by stenotic coronary arteries.
Impact:
- Provides a comprehensive overview of stress echocardiography's utility in modern cardiac departments.
- Aids clinicians in selecting appropriate non-invasive testing for CAD evaluation.
- Enhances understanding of how stress echocardiography contributes to patient management and outcomes.
Abstract:
Stress echocardiography is an accepted alternative method for non-invasive assessment of coronary artery disease--diagnosis, risk stratification and prognosis. Myocardial ischaemia triggers a cascade of events resulting first in regional relaxation abnormalities (or diastolic dysfunction) followed by regional motion abnormalities (or diastolic dysfunction). The basic principle in stress echocardiography is to provoke myocardial ischemia by exercise, pharmacologic interventions (like dobutamine, dipirydamole, enoximone, adenosine) or less often atrial pacing and subsequently to evaluate regional wall motion abnormalities in segments vascularized by coronaries with flow--limiting stenosis. Myocardial viability can be identified at the low dose dobutamine or dipirydamole stage as a functional improvement in regions with rest dyssynergy and myocardial ischaemia can be recognized at high doses as well motion dysfunction. The ideal test for evaluation of the patient with CAD remains exercise stress testing, pharmacologic stress should be reserved only for those patients in whom optimal workload of stress cannot be obtained. This article reviews the current status of stress echocardiography in clinical practice and assesses the possible indications for the tests in a modern cardiac department.