Augmented Velocity Index of Intra-abdominal, Carotid and Retinal Arteries

Not yet recruiting

• Conditions: Arterial Stiffness

• Registration Number: NCT05273905
• Lead Sponsor: Chinese University of Hong Kong

Brief Summary

Background:

Augmented Velocity Index (Avi) is a new Doppler index which can potentially be used to assess arterial stiffness. The Avi of common carotid artery is found to be associated with arterial stiffness and have initial correlation with cardiovascular risk factors. Avi can be used in any vessels (superficial or deep vessels) where arterial Doppler waveforms can be obtained.

Aims:

The aims of this study are to investigate the associations of Avi of hepatic artery, renal artery, central retinal artery and internal carotid artery with arterial stiffness and cardiovascular risk factors in a group of apparently normal subjects.

Methods:

Recruit 350 subjects with no known medical illness or drug treatment for ultrasound examinations and blood tests. In ultrasound examination, the Avi of carotid arteries, hepatic arteries, renal arteries and retinal arteries are recorded. The carotid-femoral pulse wave velocity is also calculated for the assessment of central aortic stiffness.

Other important correlates of arterial stiffness including carotid intima-media thickness, fatty liver status, liver stiffness and abdominal fat thickness are assessed in the ultrasound examination.

The clinical and laboratory examinations include anthropometric indexes, plasma glucose level, lipid profile, renal function tests, liver function test, urinary albumin creatinine ratio, blood pressure measurement.

Detailed Description

Not available

Study Timeline

• Status Verified: 2022-03
• Study First Submitted: 2022-03-01
• Study First Submitted QC: 2022-03-01
• Last Update Submitted: 2022-03-09
• Study First Posted: 2022-03-10
• Last Update Posted: 2022-03-24
• Study Start: 2022-05
• Primary Completion: 2024-08
• Study Completion: 2025-03

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 350

Inclusion Criteria

• Apparently healthy volunteers

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Exclusion Criteria

• Subjects with known medical illnesses including cancer, stroke, cardiovascular disease, diabetes, hypertension, dyslipidaemia, peripheral vascular disease, gout, systemic lupus erythematosus, psoriasis, rheumatoid arthritis and thyrotoxicosis.
• Subjects with long term drug use

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Augmented Velocity Index (Avi)	Aug 2022 - May 2024	Avi of carotid, renal, hepatic and retinal arteries as recorded from the Doppler ultrasound waveforms of those arteries

Secondary Outcome Measures

Name	Time	Method
Arterial wall thickness, liver stiffness and fatty liver status	Aug 2022 - May 2024	Intima-media thickness of carotid artery is measured in gray scale ultrasound images; Liver stiffness is assessed by shear wave elastography of ultrasound technique; Fatty liver status is determined by the attenuation imaging of ultrasound