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Peak systolic velocity and flow volume increase with blood pressure in low resistance systems
- Source :
- Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine. 14(3)
- Publication Year :
- 1995
-
Abstract
- This study demonstrates that when vascular resistance is low, peak systolic velocity and peak flow volume increase with increasing blood pressure. We used ischemia with reactive hyperemia to create reproducible low resistance conditions in 32 volunteers. Ischemia resulted in sharp increases in systolic and diastolic velocities, while the difference between these velocities increased minimally. Spontaneous variations in subject's systolic blood pressure were positively correlated with peak systolic volume and peak flow volume (r = 0.40 and 0.59, respectively), but resistive index was not. We conclude that low resistance flow is blood pressure dependent. Because blood pressure increases with age, tumor velocity and frequency shift thresholds may need blood pressure correction if applied over wide age ranges. The resistive index was independent of blood pressure and thus may be preferable.
- Subjects :
- Adult
Male
medicine.medical_specialty
Systole
Pulsatile flow
Hemodynamics
Blood volume
Blood Pressure
Hyperemia
Ischemia
Internal medicine
Neoplasms
medicine
Humans
Radiology, Nuclear Medicine and imaging
Reactive hyperemia
End-systolic volume
Blood Volume
Radiological and Ultrasound Technology
business.industry
Ultrasonography, Doppler
Middle Aged
Pulse pressure
medicine.anatomical_structure
Blood pressure
Anesthesia
Cardiology
Vascular resistance
Female
Vascular Resistance
business
Blood Flow Velocity
Subjects
Details
- ISSN :
- 02784297
- Volume :
- 14
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
- Accession number :
- edsair.doi.dedup.....bd338bdf509be4adc1cc1c6aa5c25f60