Turbulence 英 [ˈtɜːbjələns] 美 [ˈtɜːrbjələns]
释义 n. 骚乱，动荡；[流] 湍流；狂暴
例句 With all the turbulence in the housing market, this is no time to play politics with such a critical appointment.
作者： Christian Jansen
In patients with liver cirrhosis, autonomic dysfunction (AD) is a frequent finding. Its presence aggravates morbidity and mortality and might play an important role in outcome. AD comprises a broad spectrum of clinical signs and can be assessed by a variety of parameters such as heart rate or blood pressure changes after different maneuvers like Valsalva maneuver or isometric exercise. Heart rate variability (HRV), QT-interval and other parameters have been extensively investigated in liver disease. HRT is a relatively novel HRV measure that describes baroreflex-mediated variations in sinus cycle length after the loss of cardiac output due to a premature ventricular contraction (PVC). HRT is characterized by two parameters, turbulence onset (TO) and slope (TS), that further describe the intensity of heart rate variation after a PVC. HRT is usually assessed from Holter recordings over at least 24 h. HRT is a useful approach to assess AD. It was initially evaluated for risk stratification in cardiac disease, especially in postinfarct patients.