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Clinical evaluation versus Doppler echocardiography in the quantitative assessment of valvular heart disease
W M Jaffe1, A H Roche, H A Coverdale
1Department of Cardiology, Green Lane Hospital, Auckland, New Zealand.
Insights
Doppler echocardiography accurately detects significant valvular heart disease, outperforming clinical evaluation. This cardiac imaging technique may reduce the need for cardiac catheterization in selected patients.
Area of Science:
- Cardiology
- Medical Imaging
- Diagnostic Medicine
Background:
- Valvular heart disease diagnosis relies on clinical evaluation and cardiac catheterization.
- The accuracy of Doppler echocardiography in assessing valvular heart disease severity requires further validation.
Purpose of the Study:
- To compare the accuracy of Doppler echocardiography with clinical evaluation for detecting significant aortic and mitral valvular heart disease.
- To assess the accuracy of Doppler echocardiography against cardiac catheterization for valvular disease severity.
- To determine if cardiac catheterization can be obviated in selected patients.
Main Methods:
- Prospective evaluation of 75 consecutive patients with suspected valvular heart disease.
- Categorization of valve lesions (absent, insignificant, significant) using clinical and Doppler echocardiographic criteria.
- Cardiac catheterization defined significant lesions by specific valve area or regurgitation criteria.
Main Results:
- Doppler echocardiography demonstrated higher overall accuracy than clinical evaluation for all valve lesions.
- Accuracy improvements for specific conditions: mitral stenosis (28%), aortic stenosis (19%), aortic regurgitation (15%), mitral regurgitation (7%).
- Clinical evaluation alone resulted in 28 errors, potentially leading to inappropriate management in 17 patients.
Conclusions:
- Doppler echocardiography is a highly accurate tool for diagnosing significant valvular heart disease.
- The diagnostic performance of Doppler echocardiography suggests it can replace cardiac catheterization in select cases.
- Accurate non-invasive assessment of valvular heart disease can optimize patient management and reduce invasive procedures.
Abstract:
We tested the hypotheses that Doppler echocardiography has a higher accuracy than clinical evaluation in the detection of significant aortic and mitral valvular heart disease and that Doppler echocardiography is highly accurate as compared with cardiac catheterization for the assessment of valvular disease severity. Thus, cardiac catheterization for the assessment of valve lesion severity may be unnecessary in selected patients. We prospectively evaluated 75 consecutive patients, ages 20-74 years (mean, 52 years), with clinically suspected valvular heart disease. Specific clinical and Doppler echocardiographic criteria were used to categorize each valve lesion as absent, insignificant, or significant. Criteria for a significant lesion at cardiac catheterization was an aortic or mitral valve area less than 1.1 or 1.5 cm2, respectively, or equal to or greater than 3+ cm2 aortic or mitral regurgitation at angiography. In all valve lesions, Doppler echocardiography had a higher overall accuracy than clinical evaluation. Increases in accuracies of 28%, 19%, 15%, and 7% occurred for mitral stenosis, aortic stenosis, aortic regurgitation, and mitral regurgitation, respectively, resulting in overall accuracies of 97%, 100%, 95%, and 96%. Clinical evaluation alone made 28 errors (37% of patients and 19% of valve lesions assessed), and 17 of these errors (23% of patients and 12% of valve lesions) would have resulted in inappropriate management. In only four (24%) of these 17 patients, the attending cardiologist would not have proceeded to assess the valve at cardiac catheterization.(ABSTRACT TRUNCATED AT 250 WORDS)