The Experts below are selected from a list of 45 Experts worldwide ranked by ideXlab platform

Rosemary Frame - One of the best experts on this subject based on the ideXlab platform.

  • effect of radial artery harvest on collateral forearm blood flow and digital perfusion
    The Journal of Thoracic and Cardiovascular Surgery, 2002
    Co-Authors: Richard F Brodman, Laurie E Hirsh, Rosemary Frame
    Abstract:

    Abstract Background: Changes describing digital and forearm circulation after radial artery harvest have been reported infrequently. Methods: This prospective study examined digital perfusion and forearm collateral circulation preoperatively and postoperatively in patients who underwent coronary artery bypass grafting with radial artery free grafts. Noninvasive evaluation was conducted with digital Photoelectric Plethysmography and color flow and pulsed Doppler studies. Results: Thumb perfusion index decreased from 1.25 to 0.84 (30%, P P P P Conclusions: Our study identified a mild reduction in digital perfusion and an increase in ulnar artery flow velocity and diameter with no clinical sequelae or compromise in hand function after radial artery harvest in properly selected patients. J Thorac Cardiovasc Surg 2002;123:512-6

Richard F Brodman - One of the best experts on this subject based on the ideXlab platform.

  • effect of radial artery harvest on collateral forearm blood flow and digital perfusion
    The Journal of Thoracic and Cardiovascular Surgery, 2002
    Co-Authors: Richard F Brodman, Laurie E Hirsh, Rosemary Frame
    Abstract:

    Abstract Background: Changes describing digital and forearm circulation after radial artery harvest have been reported infrequently. Methods: This prospective study examined digital perfusion and forearm collateral circulation preoperatively and postoperatively in patients who underwent coronary artery bypass grafting with radial artery free grafts. Noninvasive evaluation was conducted with digital Photoelectric Plethysmography and color flow and pulsed Doppler studies. Results: Thumb perfusion index decreased from 1.25 to 0.84 (30%, P P P P Conclusions: Our study identified a mild reduction in digital perfusion and an increase in ulnar artery flow velocity and diameter with no clinical sequelae or compromise in hand function after radial artery harvest in properly selected patients. J Thorac Cardiovasc Surg 2002;123:512-6

James B Skatrud - One of the best experts on this subject based on the ideXlab platform.

  • neurocirculatory consequences of abrupt change in sleep state in humans
    Journal of Applied Physiology, 1996
    Co-Authors: Barbara J Morgan, David C Crabtree, Dominic S Puleo, M S Badr, F Toiber, James B Skatrud
    Abstract:

    The arterial pressure elevations that accompany sleep apneas may be caused by chemoreflex stimulation, negative intrathoracic pressure, and/or arousal. To assess the neurocirculatory effects of arousal alone, we applied graded auditory stimuli during non-rapid-eye-movement (NREM) sleep in eight healthy humans. We measured muscle sympathetic nerve activity (intraneural microelectrodes), electroencephalogram (EEG; C4/A1 and O1/A2), arterial pressure (Photoelectric Plethysmography), heart rate (electrocardiogram), and stroke volume (impedance cardiography). Auditory stimuli caused abrupt increases in systolic and diastolic pressures (21 +/- 2 and 15 +/- 1 mmHg) and heart rate (11 +/- 2 beats/min). Cardiac output decreased (-10%). Stimuli that produced EEG evidence of arousal evoked one to two large bursts of sympathetic activity (316 +/- 46% of baseline amplitude). Stimuli that did not alter EEG frequency produced smaller but consistent pressor responses even though no sympathetic activation was observed. We conclude that arousal from NREM sleep evokes a pressor response caused by increased peripheral vascular resistance. Increased sympathetic outflow to skeletal muscle may contribute to, but is not required for, this vasoconstriction. The neurocirculatory effects of arousal may augment those caused by asphyxia during episodes of sleep-disordered breathing.

Chen Peixin - One of the best experts on this subject based on the ideXlab platform.

  • principle and clinical application of Photoelectric Plethysmography
    China Medical Devices, 2011
    Co-Authors: Chen Peixin
    Abstract:

    Photoelectric Plethysmography(PPG) is a non-invasive detection method by means of Photoelectric detecting blood volume in living tissue.PPG signal contains some physiology and pathology information of circulatory system and respiratory system etc.The paper introduces the basic research and various clinical application about PPG,indicating a good prospect of application as a non-invasive method in detecting all kinds of parameters of blood oxygen,pulse rate,blood pressure,blood glucose,microcirculation,vascular resistance etc.

Laurie E Hirsh - One of the best experts on this subject based on the ideXlab platform.

  • effect of radial artery harvest on collateral forearm blood flow and digital perfusion
    The Journal of Thoracic and Cardiovascular Surgery, 2002
    Co-Authors: Richard F Brodman, Laurie E Hirsh, Rosemary Frame
    Abstract:

    Abstract Background: Changes describing digital and forearm circulation after radial artery harvest have been reported infrequently. Methods: This prospective study examined digital perfusion and forearm collateral circulation preoperatively and postoperatively in patients who underwent coronary artery bypass grafting with radial artery free grafts. Noninvasive evaluation was conducted with digital Photoelectric Plethysmography and color flow and pulsed Doppler studies. Results: Thumb perfusion index decreased from 1.25 to 0.84 (30%, P P P P Conclusions: Our study identified a mild reduction in digital perfusion and an increase in ulnar artery flow velocity and diameter with no clinical sequelae or compromise in hand function after radial artery harvest in properly selected patients. J Thorac Cardiovasc Surg 2002;123:512-6