A pilot study of the relationship between Doppler-estimated carotid and brachial artery flow and cardiac index

Ulrike Weber, Neil John Glassford, Glenn M Eastwood, Rinaldo Bellomo, Andrew Kent Hilton

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4 Citations (Scopus)


Summary We measured carotid and brachial artery blood flow by Doppler ultrasound in 11 human volunteers, and related these to cardiac index and to each other. The median (IQR [range]) carotid arterial blood flow was 0.334 (0.223-0.381 [0.052-0.563]) l.min-1 on the right and 0.315 (0.223-0.369 [0.061-0.690]) l.min-1 on the left. The brachial arterial blood flow was 0.049 (0.033-0.062 [0.015-0.204]) l.min-1 on the right and 0.039 (0.027-0.054 [0.011-0.116]) on the left. Cardiac index was 3.2 (2.8-3.5 [1.9-5.4]) l.min-1.m-2. There was a moderate to good correlation between right-and left-sided flows (brachial: ? = 0.45; carotid: ? = 0.567). Brachial and carotid flow had no or a negative correlation with cardiac index (right brachial: ? = -0.145, left brachial: ? = -0.349; right carotid: ? = -0.376, left carotid: ? = -0.285). In contrast to some previous studies, we found that Doppler-estimated peripheral arterial blood flows only show a weak correlation with cardiac index and cannot be used to provide non-invasive estimates of cardiac index in man.
Original languageEnglish
Pages (from-to)1140-1147
Number of pages8
Issue number10
Publication statusPublished - 2015


  • Adult Blood Flow Velocity/physiology Brachial Artery/diagnostic imaging/*physiology Cardiac Output/*physiology Carotid Artery, Common/diagnostic imaging/*physiology Female Humans Male Middle Aged Pilot Projects Prospective Studies Regional Blood Flow/physiology Reproducibility of Results Ultrasonography, Doppler/methods

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