Hargreaves A D, Muir A L
Department of Medicine, Edinburgh University.
Br Heart J. 1992 Jun;67(6):486-90. doi: 10.1136/hrt.67.6.486.
To investigate the peripheral venous response to head up tilting in malignant vasovagal syndrome.
31 Patients with unexplained syncope or dizziness referred from the cardiology department.
Changes in calf venous volume were studied by a radionuclide technique during 45 degrees head up tilt testing.
During tilt testing six patients became syncopal but 25 were symptom free. The syncopal group had greater increases in calf venous volume after the change in posture and perhaps more importantly considerably less variability in the venous volume during the tilted period.
The venous response was different in the syncopal patients. The lack of response of the peripheral venous circulation to changes in the central circulation may be responsible for triggering the Bezold-Jarisch reflex and malignant vasovagal syncope.
研究恶性血管迷走性综合征患者头部抬高倾斜时的外周静脉反应。
31例由心内科转诊的不明原因晕厥或头晕患者。
采用放射性核素技术研究45度头部抬高倾斜试验期间小腿静脉容量的变化。
倾斜试验期间，6例患者发生晕厥，25例无症状。晕厥组在姿势改变后小腿静脉容量增加更多，或许更重要的是，在倾斜期间静脉容量的变异性明显更小。
晕厥患者的静脉反应不同。外周静脉循环对中心循环变化缺乏反应可能是触发贝佐尔德-雅里什反射和恶性血管迷走性晕厥的原因。
