Key result
Dobutamine stress echocardiography revealed a significant linear relation between transaortic pressure difference and flow in 68% of patients with aortic stenosis, with slopes varying by severity (p=0.0055).
Why the study?
Does dobutamine stress echocardiography demonstrate a direct relation between transaortic pressure difference and flow in asymptomatic patients with aortic stenosis?
Population
50 asymptomatic patients with all grades of aortic stenosis
Design
Cross-sectional
Authors
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Hypothesis-generating for dobutamine stress echocardiography in aortic stenosis grading; leaves open prospective validation before clinical use.
Observational (n=50)
Does dobutamine stress echocardiography demonstrate a direct relation between transaortic pressure difference and flow in asymptomatic patients with aortic stenosis?
p-value: p=0.0055
Transaortic pressure difference is directly related to flow in most patients with aortic stenosis during dobutamine stress echocardiography, with steeper slopes in severe disease.
Takeda et al. (1999) conducted an observational in Aortic stenosis (n=50). Dobutamine stress echocardiography vs. Comparisons between grades of aortic stenosis was evaluated on Relation between transaortic pressure difference and flow (p=0.0055). Dobutamine stress echocardiography revealed a significant linear relation between transaortic pressure difference and flow in 68% of patients with aortic stenosis, with slopes varying by severity (p=0.0055).
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