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Stress nuclear myocardial perfusion imaging versus stress echocardiography: prognostic comparisons
K A Brown1, D R Rosman, R M Dave
1Department of Medicine, University of Vermont College of Medicine, Burlington, USA.
Insights
Noninvasive stress cardiac imaging helps identify patients with coronary artery disease who need invasive procedures. Stress nuclear myocardial perfusion imaging is superior to stress echocardiography for risk stratification.
Area of Science:
- Cardiology
- Medical Imaging
Background:
- Noninvasive stress cardiac imaging is increasingly used for risk stratification in patients with coronary artery disease (CAD).
- Accurate risk assessment is crucial to identify patients who will benefit from invasive procedures like cardiac catheterization and coronary revascularization.
- Identifying low-risk patients allows for deferral of interventions, especially in those with other increased risk markers.
Purpose of the Study:
- To evaluate the utility of noninvasive stress cardiac imaging in risk stratification for patients with known or suspected CAD.
- To compare the effectiveness of stress nuclear myocardial perfusion imaging versus stress echocardiography in identifying jeopardized viable myocardium.
Main Methods:
- Review of existing data comparing stress echocardiography and stress nuclear myocardial perfusion imaging.
- Assessment of the relationship between cardiac risk and the presence/extent of jeopardized viable myocardium.
Main Results:
- Cardiac risk is strongly associated with the extent of jeopardized viable myocardium detected by noninvasive imaging.
- Stress nuclear myocardial perfusion imaging detects significantly more jeopardized viable myocardium than stress echocardiography.
- Consequently, stress nuclear imaging identifies more patients at risk for cardiac events.
Conclusions:
- Stress nuclear myocardial perfusion imaging offers advantages over stress echocardiography for risk stratification in patients with CAD.
- This imaging modality can guide clinical decisions regarding invasive procedures and future patient care.
Abstract:
The use of noninvasive stress cardiac imaging for stratifying risk in patients with known or suspected coronary artery disease is growing as a tool for identification of the subgroup most likely to benefit from the expense and risk of more invasive procedures, including cardiac catheterization and coronary revascularization. In this setting, it is especially important that a test be able to identify patients with sufficiently low risk that clinicians are comfortable in deferring such interventions, especially in those with other markers of increased risk. Previous data have shown that cardiac risk is most closely related to the presence and extent of jeopardized viable myocardium on noninvasive stress cardiac imaging. Although stress echocardiography may have comparable ability to detect coronary artery disease, current data suggest that stress echocardiography detects significantly less jeopardized viable myocardium than stress nuclear myocardial perfusion imaging and consequently fewer patients at risk for cardiac events. Stress nuclear myocardial perfusion imaging may therefore have important advantages for risk stratification and the direction of future care of patients with known or suspected coronary artery disease.