Enhanced endocardial visualization with noncontrast harmonic imaging during stress echocardiography
D G Skolnick1, S G Sawada, H Feigenbaum
1Krannert Institute of Cardiology, Indiana University School of Medicine, Indianapolis, IN 46202-4800, USA.
Summary
Noncontrast harmonic imaging significantly improves visualization of the left ventricle endocardium during echocardiography. This enhanced imaging technique reduces non-diagnostic segments, leading to more reliable diagnostic assessments.
Area of Science:
- Cardiovascular Imaging
- Medical Ultrasound Technology
Background:
- Echocardiography's diagnostic accuracy depends on clear visualization of the left ventricle endocardium.
- Limitations in endocardial visualization can impact diagnostic interpretation.
Purpose of the Study:
- To assess the benefit of noncontrast harmonic imaging in improving endocardial visualization.
- To compare harmonic imaging with fundamental imaging in stress echocardiography.
Main Methods:
- Eighty outpatients undergoing treadmill stress echocardiography were randomized to fundamental or harmonic imaging.
- Two experienced readers evaluated endocardial visualization and diagnostic quality.
- A scoring system was used to quantify endocardial visualization improvement.
Main Results:
- Harmonic imaging improved endocardial visualization scores by 35% and 21% for the two readers (P <.001).
- The percentage of non-diagnostic echocardiographic segments was halved with harmonic imaging (P <.01).
Conclusions:
- Noncontrast harmonic imaging provides a clinically significant enhancement in left ventricle endocardial visualization.
- This technique improves the diagnostic quality of stress echocardiography, particularly in challenging cases.
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