Key result
2D Doppler echocardiography shows excellent correlation with catheter-measured stenotic pressure gradients in a canine model.
Why the study?
Does a Doppler echocardiographic method accurately estimate pressure drops across discrete stenotic obstructions compared to invasive catheter measurements in a canine model?
Population
Six mongrel dogs with an open-chest preparation and a pulmonary arterial band to create varying degrees of…
Comparison
Two-dimensional Doppler echocardiographic method… vs Invasive catheter-measured pressure drops
Design
Preclinical
Authors
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Supports noninvasive gradient estimation in discrete stenoses; leaves open prospective human validation before clinical use.
Does a Doppler echocardiographic method accurately estimate pressure drops across discrete stenotic obstructions compared to invasive catheter measurements in a canine model?
Effect estimate: r = 0.96
Doppler echocardiography using the simplified Bernoulli equation accurately estimates pressure gradients across discrete stenotic obstructions in an animal model.
Valdes‐Cruz et al. (1984) studied discrete stenotic obstructions (n=6). Two-dimensional Doppler echocardiography vs. Catheter-measured pressure gradients was evaluated on Correlation between Doppler-calculated and actual pressure gradients (r = 0.96). Two-dimensional Doppler echocardiography showed an excellent correlation with actual catheter-measured pressure gradients across discrete stenotic obstructions in a canine model (r = 0.96).
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