Royse Colin F, Ruizhi Ni, Huynh Andrew L, Royse Alistair G
Department of Pharmacology, University of Melbourne, Level 8, Medical Building, 3010 Carlton, Australia.
Anesthesiol Res Pract. 2011;2011:165874. doi: 10.1155/2011/165874. Epub 2011 Feb 17.
Left ventricular tissue Doppler imaging (TDI) velocities are used to monitor systolic and diastolic function, but it is not known how these may change in a hyperdynamic circulation, as often occurs in anesthesia and critical care medicine. Twenty-six healthy young volunteers were recruited and left ventricular systolic and diastolic tissue Doppler velocities measured at rest, light exercise, strenuous exercise, and recovery (10 minutes after exercise). At rest, TDI velocities significantly decreased from base to apex (P < .001). Within basal, mid, and apical sections, systolic and diastolic peak velocities differed between segments (P < .05), except for systolic middle (P = .094) and late diastolic apical velocities (P = .257). Basal septal velocities differed from basal lateral, for systolic (P = .041) but not diastolic peak values. Inferobasal radial values differed from basal lateral values for both systolic and diastolic velocities (P < .05). Both systolic and diastolic TDI velocities increased significantly in all segments in a proportionate manner with a hyperdynamic circulation.
左心室组织多普勒成像（TDI）速度用于监测收缩和舒张功能，但尚不清楚在高动力循环（如麻醉和重症医学中常见的情况）中这些速度会如何变化。招募了26名健康年轻志愿者，在静息、轻度运动、剧烈运动和恢复阶段（运动后10分钟）测量左心室收缩和舒张组织多普勒速度。静息时，TDI速度从心底到心尖显著降低（P <.001）。在心底、中间和心尖节段内，除了收缩期中间节段（P =.094）和舒张期末期心尖速度（P =.257）外，各节段的收缩和舒张峰值速度存在差异（P <.05）。心底间隔速度与心底侧壁速度在收缩期峰值有差异（P =.041），但舒张期峰值无差异。下心底径向速度与心底侧壁速度在收缩期和舒张期速度均有差异（P <.05）。在高动力循环时，所有节段的收缩和舒张TDI速度均以成比例的方式显著增加。
