Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change

The purpose of this study was to measure blood flow velocities in carotid, brachial and femoral arteries simultaneously during passive postural change using our developed telemetry measurement system. This system was implemented with synchronized measurement of electrocardiogram (ECG). The velocity...

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Main Authors:	Noor Azmi, Azran Azhim, M., Katai, M., Akutagawa, Y., Hirao, K., Yoshizaki, S., Obara, M., Nomura, H., Tanaka, H., Yamaguchi, Y., Kinouchi
Format:	Conference or Workshop Item
Language:	English
Published:	IEEE 2006
Subjects:	TP248.13 Biotechnology
Online Access:	http://irep.iium.edu.my/44093/ http://irep.iium.edu.my/44093/ http://irep.iium.edu.my/44093/1/Measurement_of_blood_flow_velocity_waveforms_in_the_carotid%2C_brachial_and_femoral_arteries_during_postural_change.pdf

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recordtype	eprints
spelling	iium-440932015-08-17T03:16:21Z http://irep.iium.edu.my/44093/ Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change Noor Azmi, Azran Azhim M., Katai M., Akutagawa Y., Hirao K., Yoshizaki S., Obara M., Nomura H., Tanaka H., Yamaguchi Y., Kinouchi TP248.13 Biotechnology The purpose of this study was to measure blood flow velocities in carotid, brachial and femoral arteries simultaneously during passive postural change using our developed telemetry measurement system. This system was implemented with synchronized measurement of electrocardiogram (ECG). The velocity waveforms and ECG were continuously measured in six putatively healthy young subjects for 130 s during passive postural changes in supine and 90 degrees head-up-tilt (HUT), respectively. Peak systolic SI and end-diastolic d velocities were obtained from the velocity waveforms in 3 arteries, and using these velocities as an index of d/Sl to assess the velocity waveforms during the postural change. The velocity waveforms of 3 arteries, heart rate (HR), and blood pressure (BP) were assessed for 20 s at the stages of postural change. As a result, HTJT-induced increase in HR was more pronounced in the young subjects. The index of d/Sl in carotid was significantly decreased during HUT, whereas the index of that in brachial and femoral arteries were significantly increased. There was significant increase in diastolic BP but, a non significant change in systolic BP to tilt. The decreased of the blood flow index in the carotid artery was expected to be the effect of cerebral autoregulation (CA) to control blood flow to the brain. In contrast, the blood flow in the brachial and femoral was more influenced of venous pressure (VP) in postural change. In conclusion, HUT produced larger changes in the 3 arteries, particularly in brachial and femoral, and also in HR and diastolic BP. This study demonstrated that synchronized measurement of blood flow velocity waveforms in carotid, brachial, and femoral in HUT postural change using our telemetry measurement device was attainable. Thus, this method could prove to be a useful tool for investigating cardiovascular disease (CD) risk with further research and development. IEEE 2006 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/44093/1/Measurement_of_blood_flow_velocity_waveforms_in_the_carotid%2C_brachial_and_femoral_arteries_during_postural_change.pdf Noor Azmi, Azran Azhim and M., Katai and M., Akutagawa and Y., Hirao and K., Yoshizaki and S., Obara and M., Nomura and H., Tanaka and H., Yamaguchi and Y., Kinouchi (2006) Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change. In: International Conference on Biomedical and Pharmaceutical Engineering, ICBPE 2006., 11-14 Dec. 2006, Singapore. http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4155940
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TP248.13 Biotechnology
spellingShingle	TP248.13 Biotechnology Noor Azmi, Azran Azhim M., Katai M., Akutagawa Y., Hirao K., Yoshizaki S., Obara M., Nomura H., Tanaka H., Yamaguchi Y., Kinouchi Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change
description	The purpose of this study was to measure blood flow velocities in carotid, brachial and femoral arteries simultaneously during passive postural change using our developed telemetry measurement system. This system was implemented with synchronized measurement of electrocardiogram (ECG). The velocity waveforms and ECG were continuously measured in six putatively healthy young subjects for 130 s during passive postural changes in supine and 90 degrees head-up-tilt (HUT), respectively. Peak systolic SI and end-diastolic d velocities were obtained from the velocity waveforms in 3 arteries, and using these velocities as an index of d/Sl to assess the velocity waveforms during the postural change. The velocity waveforms of 3 arteries, heart rate (HR), and blood pressure (BP) were assessed for 20 s at the stages of postural change. As a result, HTJT-induced increase in HR was more pronounced in the young subjects. The index of d/Sl in carotid was significantly decreased during HUT, whereas the index of that in brachial and femoral arteries were significantly increased. There was significant increase in diastolic BP but, a non significant change in systolic BP to tilt. The decreased of the blood flow index in the carotid artery was expected to be the effect of cerebral autoregulation (CA) to control blood flow to the brain. In contrast, the blood flow in the brachial and femoral was more influenced of venous pressure (VP) in postural change. In conclusion, HUT produced larger changes in the 3 arteries, particularly in brachial and femoral, and also in HR and diastolic BP. This study demonstrated that synchronized measurement of blood flow velocity waveforms in carotid, brachial, and femoral in HUT postural change using our telemetry measurement device was attainable. Thus, this method could prove to be a useful tool for investigating cardiovascular disease (CD) risk with further research and development.
format	Conference or Workshop Item
author	Noor Azmi, Azran Azhim M., Katai M., Akutagawa Y., Hirao K., Yoshizaki S., Obara M., Nomura H., Tanaka H., Yamaguchi Y., Kinouchi
author_facet	Noor Azmi, Azran Azhim M., Katai M., Akutagawa Y., Hirao K., Yoshizaki S., Obara M., Nomura H., Tanaka H., Yamaguchi Y., Kinouchi
author_sort	Noor Azmi, Azran Azhim
title	Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change
title_short	Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change
title_full	Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change
title_fullStr	Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change
title_full_unstemmed	Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change
title_sort	measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change
publisher	IEEE
publishDate	2006
url	http://irep.iium.edu.my/44093/ http://irep.iium.edu.my/44093/ http://irep.iium.edu.my/44093/1/Measurement_of_blood_flow_velocity_waveforms_in_the_carotid%2C_brachial_and_femoral_arteries_during_postural_change.pdf
first_indexed	2023-09-18T21:02:43Z
last_indexed	2023-09-18T21:02:43Z
_version_	1777410730951180288

Measurement of blood flow velocity waveforms in the carotid, brachial and femoral arteries during postural change

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