Tissue Doppler Imaging of the Diaphragm in Healthy Subjects and Critically Ill Patients.

ABSTRACT: Rationale: Tissue Doppler imaging (TDI) is an echocardiographic method that measures the velocity of moving tissue.Objectives: We applied this technique to the diaphragm to assess the velocity of diaphragmatic muscle motion during contraction and relaxation.Methods: In 20 healthy volunteers, diaphragmatic TDI was performed to assess the pattern of diaphragmatic motion velocity, measure its normal values, and determine the intra- and interobserver variability of measurements. In 116 consecutive ICU patients, diaphragmatic excursion, thickening, and TDI parameters of peak contraction velocity, peak relaxation velocity, velocity-time integral, and TDI-derived maximal relaxation rate were assessed during weaning. In a subgroup of 18 patients, transdiaphragmatic pressure (P

SUBMITTER: Soilemezi E 

PROVIDER: S-EPMC7528801 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature