Speckle-Tracking Strain Imaging Identifies Alterations in Left Atrial Mechanics With General Anesthesia and Positive-Pressure Ventilation.
作者： Kimberly Howard-Quijano , John Anderson-Dam , Melissa McCabe , Michael Hall , Einat Mazor
DOI: 10.1053/J.JVCA.2015.01.014
关键词: Prospective cohort study 、 Strain (injury) 、 Cardiology 、 Preload 、 Anesthesia 、 Breathing 、 Left atrial 、 Cardiac surgery 、 Contractility 、 Internal medicine 、 Mechanics 、 Positive pressure ventilation 、 Medicine
摘要: Objectives The primary aim of this study was to use speckle-tracking strain imaging evaluate the effect general anesthesia (GA) and positive-pressure ventilation (PPV) on left atrial (LA) mechanics. authors hypothesized that GA PPV would be associated with a decrease in LA strain. secondary aims were investigate effects traditional Doppler-derived measures function Doppler echocardiographic grade diastolic function. Design A prospective observational study. Setting university hospital. Participants Adult patients undergoing cardiac surgery. Interventions Transthoracic echocardiography performed at baseline under PPV. Measurements Main Results Changes assessed using imaging. reduction observed peak longitudinal (24% v 18%, p Conclusions Speckle-tracking atrium demonstrated had significant impact mechanics by decreasing preload, lesser contractility.
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