Finger photoplethysmogram pulse amplitude changes induced by flow-mediated dilation. Export

@article{citeulike:3078112, abstract = {This study was conducted to investigate the utility and efficacy of finger photoplethysmogram pulse amplitude (PPG-AC) in comparison with the standard Doppler ultrasound in assessing an endothelial function via flow-mediated dilation (FMD). High-resolution B-mode scanning of the right brachial artery (BA) of 31 healthy subjects aged 39.7 +/- 11.3 (range 22-64) years and 52 risk subjects aged 47.7 +/- 10.8 (range 30-65) years were performed before and after 4 min of upper arm occlusion. Concurrent with the ultrasound measurement (where color Doppler imaging was used to enhance arterial boundary detection), PPG signals were recorded from both index fingers for cross evaluation and comparison. Our results show that the finger PPG-AC exhibits a similar response to that of the well-known BA dilation: following the release of pressure (cuff around the BA), the PPG-AC increases abruptly before slowly decreasing toward the baseline. The peak PPG-AC is reached significantly faster than the peak FMD measured by ultrasound among healthy and risk groups (P < 0.001). The proposed technique using a finger photoplethysmogram can be applied in a rapid and non-invasive assessment of peripheral vascular functions as an alternative low-cost and less operator-dependent tool compared to ultrasound.}, address = {Biomedical Engineering Laboratory, School of Electrical Engineering, Sharif University of Technology, Tehran, Iran.}, author = {Zahedi, E. and Jaafar, R. and Ali, M. A. and Mohamed, A. L. and Maskon, O.}, citeulike-article-id = {3078112}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/18460764}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=18460764}, issn = {0967-3334}, journal = {Physiological measurement}, keywords = {ppg}, month = {May}, number = {5}, pages = {625--637}, posted-at = {2008-09-29 04:31:53}, priority = {2}, title = {Finger photoplethysmogram pulse amplitude changes induced by flow-mediated dilation.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/18460764}, volume = {29}, year = {2008} }

TY - JOUR ID - citeulike:3078112 L3 - citeulike-article-id:3078112 N2 - This study was conducted to investigate the utility and efficacy of finger photoplethysmogram pulse amplitude (PPG-AC) in comparison with the standard Doppler ultrasound in assessing an endothelial function via flow-mediated dilation (FMD). High-resolution B-mode scanning of the right brachial artery (BA) of 31 healthy subjects aged 39.7 +/- 11.3 (range 22-64) years and 52 risk subjects aged 47.7 +/- 10.8 (range 30-65) years were performed before and after 4 min of upper arm occlusion. Concurrent with the ultrasound measurement (where color Doppler imaging was used to enhance arterial boundary detection), PPG signals were recorded from both index fingers for cross evaluation and comparison. Our results show that the finger PPG-AC exhibits a similar response to that of the well-known BA dilation: following the release of pressure (cuff around the BA), the PPG-AC increases abruptly before slowly decreasing toward the baseline. The peak PPG-AC is reached significantly faster than the peak FMD measured by ultrasound among healthy and risk groups (P < 0.001). The proposed technique using a finger photoplethysmogram can be applied in a rapid and non-invasive assessment of peripheral vascular functions as an alternative low-cost and less operator-dependent tool compared to ultrasound. IS - 5 JF - Physiological measurement SN - 0967-3334 AD - Biomedical Engineering Laboratory, School of Electrical Engineering, Sharif University of Technology, Tehran, Iran. EP - 637 TI - Finger photoplethysmogram pulse amplitude changes induced by flow-mediated dilation. VL - 29 SP - 625 KW - ppg AU - Zahedi, E AU - Jaafar, R AU - Ali, MA AU - Mohamed, AL AU - Maskon, O PY - 2008/05// UR - http://view.ncbi.nlm.nih.gov/pubmed/18460764 ER -