Avtor/Urednik		Oblak, JP; Zaletel, M; Žvan, B; Kiauta, T; Pogačnik, T
Naslov		The effect of age on cerebrovascular reactivity to cold pressor test and head-up tilt
Tip		članek
Vir		Acta Neurol Scand
Vol. in št.		Letnik 106
Leto izdaje		2002
Obseg		str. 30-3
Jezik		eng
Abstrakt		Objective: To compare the cold pressor test (CPT) and head-up tilt (HUT) responses of the older and younger healthy individuals by transcranial Doppler. Subject and methods: Forty healthy volunteers were divided into two age groups (18-39 years, 40-69 years). Mean blood velocity (v(m)) in both middle cerebral arteries was monitored during CPT and HUT. Mean arterial blood pressure, heart rate and end-tidal CO(2) (Et-CO(2)) were measured simultaneously. Results: The v(m) increased by 7.1% during CPT and decreased by 10.1% during HUT. The v(m) responses were significantly lower in the older group (P < 0.01). Linear regression analysis showed a significant effect of age on dv(m) during both CPT (P < 0.01) as well as HUT (P < 0.01). Conclusion: The age affected the v(m) responses to CPT and HUT in the group of older subjects.
Deskriptorji		AGING CEREBROVASCULAR CIRCULATION COLD POSTURE AGE FACTORS BLOOD FLOW VELOCITY BLOOD PRESSURE HEART RATE LINEAR MODELS CEREBRAL ARTERIES PHYSICAL STIMULATION PULMONARY GAS EXCHANGE REFERENCE VALUES TILT-TABLE TEST