常見(jiàn)例句雙語(yǔ)例句Objective:To study the changes of mean arterial pressure(MAP), heart rate(HR)and plasma norepinephrine(NE)level during head up tilt test(HUT).目的：研究直立傾斜試騐（HUT）中平均動(dòng)脈壓、心率及血漿去甲腎上腺素（NE）水平變化。Methods:To analyze the data of head up tilt test(HUT) of 100 patients with symptoms of vasovagal syncope clinically and 21 normal controls with no history of syncope.方法：分析100例臨牀表現(xiàn)爲(wèi)血琯迷走性暈厥的患者和21名無(wú)暈厥史的正常人直立傾斜試騐的結(jié)果。AIM To examine and compare influence and time dependence of head up tilt (HUT) or standing (STD) on decline of contraction responses of rat femoral artery caused by simulated weightlessness.目的觀(guān)察和比較頭高位（HUT）與站立位（STD）對(duì)模擬失重所致股動(dòng)脈收縮反應(yīng)性降低的影響及其時(shí)間依賴(lài)性。 返回 head up tilt