医学
血压
心脏病学
脉冲压力
压力测量
波形
内科学
压力传感器
舒张期
心室压
平均动脉压
主动脉压
动态血压
仰卧位
压力波
出处
期刊:Circulation
[Ovid Technologies (Wolters Kluwer)]
日期:1998-07-14
卷期号:98 (2): 186-187
被引量:352
标识
DOI:10.1161/01.cir.98.2.186
摘要
Background Central aortic pressures and waveform convey important information about cardiovascular status, but direct measurements are invasive. Peripheral pressures can be measured noninvasively, and although they often differ substantially from central pressures, they may be mathematically transformed to approximate the latter. We tested this approach, examining intersubject and intrasubject variability and the validity of using a single averaged transformation, which would enhance its applicability. Methods and Results Invasive central aortic pressure by micromanometer and radial pressure by automated tonometry were measured in 20 patients at steady state and during hemodynamic transients (Valsalva maneuver, abdominal compression, nitroglycerin, or vena caval obstruction). For each patient, transfer functions (TFs) between aortic and radial pressures were calculated by parametric model and results averaged to yield individual TFs. A generalized TF was the average of individual functions. TFs varied amo...
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