Key result
Systolic velocity in the common carotid artery increased by a mean of 9 cm/sec for each centimeter of distance from the bifurcation up to 4 cm (P < .001).
Why the study?
Does the distance from the bifurcation affect Doppler ultrasound systolic velocity measurements in the common carotid artery of healthy volunteers?
Population
20 volunteers (aged 25-43 years) with no history of neurologic or cardiovascular disease.
Design
Cross-sectional
Authors
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CCA velocity may vary by sampling distance from bifurcation; supports standardized protocols but remains hypothesis-generating.
Observational (n=20)
Does the distance from the bifurcation affect Doppler ultrasound systolic velocity measurements in the common carotid artery of healthy volunteers?
Mean Difference: 9
p-value: p=<.001
Standardizing the distance from the bifurcation for common carotid artery velocity measurements is necessary because velocity increases significantly as distance from the bifurcation increases.
Meyer et al. (1997) conducted an observational in Healthy volunteers (n=20). Distance from the carotid artery bifurcation was evaluated on Systolic velocity in the common carotid artery (mean increase of 9 cm/sec per centimeter, p=<.001). Systolic velocity in the common carotid artery increased by a mean of 9 cm/sec for each centimeter of distance from the bifurcation up to 4 cm (P < .001).
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