Sympathetic vasomotor response of the radial artery in @entity1 with XXXX .

@entity1 @entity1463 @entity730 @entity6
OBJECTIVE: Neurophysiological assessment of the peripheral autonomic system is characterized by various limitations. An alternative approach to laser Doppler and venous plethymography is the assessment of the sympathetic vasomotor response of the radial artery obtained by continuous wave Doppler sonography. Nomogram data have been established and demonstrate the temporary disappearance of diastolic flow after coughing or deep inspiration. RESEARCH DESIGN AND METHODS: We assessed the sympathetic vasomotor response in 25 @entity1 (mean age 64 years, range 43-76) with @entity6 . The Doppler data were correlated with nerve conduction studies of the median and peroneal nerve, the extent of radiologically diagnosed media @entity1463 , and compared with nomogram values (n = 41). RESULTS: Although similar mean flow velocities were found under baseline conditions, the flow pattern was characterized by higher pulsatility in the @entity6 group (resistance index [RI] 1.1 vs. 0.7). No significant difference in RI was observed after coughing. The latency of onset of the response was prolonged (2.1 vs. 1.5 s), while the duration of the response did not differ (18 vs. 15 s). Only the nerve conduction velocity of the peroneal nerve correlated inversely with the RI. The extent of radiologically proven @entity730 tended to correlate with the pulsatility of the baseline signal and the response latencies. CONCLUSIONS: The data obtained by this study suggest the concurrent existence of reduced vessel elasticity due to media @entity1463 and dysfunction of the autonomic vasomotor system.
