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Acta clinica Croatica, Vol.39 No.4 Prosinac 2000.

Izlaganje sa skupa

Effect of Breath Holding on Spectral Doppler Display at Internal Carotid Artery Bifurcation

Nikola Barić

Puni tekst: engleski, pdf (95 KB) str. 293-300 preuzimanja: 265* citiraj
APA 6th Edition
Barić, N. (2000). Effect of Breath Holding on Spectral Doppler Display at Internal Carotid Artery Bifurcation. Acta clinica Croatica, 39 (4), 293-300. Preuzeto s https://hrcak.srce.hr/14990
MLA 8th Edition
Barić, Nikola. "Effect of Breath Holding on Spectral Doppler Display at Internal Carotid Artery Bifurcation." Acta clinica Croatica, vol. 39, br. 4, 2000, str. 293-300. https://hrcak.srce.hr/14990. Citirano 18.06.2018.
Chicago 17th Edition
Barić, Nikola. "Effect of Breath Holding on Spectral Doppler Display at Internal Carotid Artery Bifurcation." Acta clinica Croatica 39, br. 4 (2000): 293-300. https://hrcak.srce.hr/14990

Sažetak
Hemodynamic events in the area of terminal internal carotid artery bifurcation play an important role in the investigation of brain physiology and pathology. The aim of the study was to contribute to the present understanding of the relation between blood velocity in the bifurcation components, and pressure and structural changes at the local level, crucial for the development of apex aneurysm. Comparison of transcranial Doppler spectra of the components with the level of hypercapnia, i.e. with the length of conscious breath holding, produced results indicating a high significance of blood velocity in the development of the mentioned pathology. Doppler shift in the ACM component at three measured levels (following apnea of 0-10, 20-30 and 40 seconds) for the peak systolic velocity was 2.1, 2.7 and 2.9 kHz, respectively. The respective values for the ACA component were 1.9, 2.7 and 2.8 kHz. At the first two levels, the respective values for the ACM M1 segment were 2.5 and 3.4 kHz. Special significance was recorded for so-called swerve losses, which occur on sudden change of blood direction into the ACA component. These losses are closely related to blood velocity, and they are essential in the development of aneurysm. Because of ethical norms and potential risk of the experiment, the author performed the measurement on himself and by himself. A low-frequency pulsing probe of 2 MHz with a Multi-Dop P ultrasonic device (DWL - Elektronische Systeme GmbH) was used in the study.

Ključne riječi
Carotid artery, internal, pathology; Cerebrovascular circulation, physiology; Respiration, physiology; Aneurysm, ultrasonography

Hrčak ID: 14990

URI
https://hrcak.srce.hr/14990

[hrvatski]

Posjeta: 614 *