Cross-sectional echocardiography in assessing the severity of valvular aortic stenosis.
Why the study?
Does cross-sectional echocardiography accurately assess the severity of valvular aortic stenosis compared to M-mode echocardiography?
Population
28 consecutive adult patients with valvular aortic stenosis and 25 patients with no evidence of aortic valve…
Comparison
Real-time, cross-sectional echocardiography… vs M-mode echocardiography
Design
Cross-sectional
Authors
Discussion
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Member takes
Implication
May support noninvasive aortic stenosis grading by cross-sectional echo; leaves open prospective validation against hemodynamics.
Key Points
- To assess the severity of valvular aortic stenosis using cross-sectional echocardiography and compare it with M-mode echocardiography.
- Cross-sectional echocardiograms recorded in 28 adults with aortic stenosis using high-resolution mechanical scanners.
- Both cross-sectional and M-mode techniques were compared for measuring aortic valve orifice diameter.
- Average aortic valve diameters were 7.9 mm in severe, 11.6 mm in moderate, 16.9 mm in mild, and 20.5 mm in normal cases.
- Severe vs moderate P < 0.005; moderate vs mild P < 0.001; mild vs normal P < 0.001 indicating significant differences in severity.
- Cross-sectional echocardiography provided better separation of severity compared to M-mode, which tended to overestimate severity in calcific cases.
Structured PICO
Does cross-sectional echocardiography accurately assess the severity of valvular aortic stenosis compared to M-mode echocardiography?
P
Population
28 consecutive adult patients with valvular aortic stenosis and 25 patients with no evidence of aortic valve disease
I
Intervention
Real-time, cross-sectional echocardiography using a high resolution, mechanical sector scanner
C
Comparator
M-mode echocardiography
O
Outcome
Aortic valve orifice diameter and its correlation with the severity of aortic stenosissurrogate
Cross-sectional echocardiography provides a reliable noninvasive assessment of aortic stenosis severity, overcoming some limitations of M-mode echocardiography such as overestimation in calcific AS and underestimation in congenital AS.
Limitations
- Some overlap in aortic valve diameter between individual groups
Cite This Study
Weyman et al. (1975) studied this question.