Related Experiment Video
Updated: Sep 17, 2025

Ultrasound Assessment of Endothelial Function: A Technical Guideline of the Flow-mediated Dilation Test
Published on: April 27, 2016
Ultrasound and functional evaluation of forearm circulation in patients with radial artery occlusion
Paweł Lewandowski1, Anna Żuk1, Tomasz Słomski1
1Department of Cardiology, Centre of Postgraduate Medical Education, Grochowski Hospital, Warsaw, Poland.
Introduction:
The transradial approach has recently gained popularity in invasive cardiology. Collateral circulation through the ulnar (UA) and anterior interosseous artery (AIA) compensates for radial artery (RA) occlusion (RAO). We evaluated arterial circulation in the forearm and hand in patients with RAO after coronary angiography (CA) and percutaneous coronary interventions (PCIs).
Methods:
This prospective observational study included 40 RAO patients (mean age, 71.22 ± 9.99 years) after CA/PCI. Collateral circulation was assessed using ultrasonography and the Barbeau test. Doppler ultrasound and anatomical parameters of RAO were evaluated.
Results:
The RA, UA, and AIA differed in peak systolic velocity, end-diastolic velocity, arterial diameter, total flow volume, and stroke volume (p < 0.01). Pulse quality differed between the RA and UA (p < 0.0001). Blood flow direction in the distal RA divided patients into those with antegrade flow from the AIA and retrograde flow from the UA (50% each). In logistic regression, Barbeau test results for fingers 2 (p = 0.0006, OR = 0.1398) and 4 (p = 0.004, OR = 0.2843) predicted the direction of blood flow in the distal RA.
Conclusion:
Ultrasound and functional evaluation can be used to assess collateral circulation and predict blood flow direction in RAO patients. However, further research is needed to confirm these findings.
More Related Videos
08:42Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
Published on: October 22, 2014
09:40Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats
Published on: November 3, 2016
Related Concept Videos
Assessment of radial pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
Arteries of the Upper Limbs
Assessment of apical radial pulse
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
Pre-Procedural Preparation
Assessing Blood pressure using a doppler ultrasound
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
Assessment of the Cardiovascular System III: Palpation
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above...