Baron Toaldo M, Glaus T, Campagna I, Novo Matos J, Dennler M
Department for Small Animals, Division of Cardiology, Clinic for Small Animal Internal Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
Department for Small Animals, Division of Cardiology, Clinic for Small Animal Internal Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
Vet J. 2021 May;271:105653. doi: 10.1016/j.tvjl.2021.105653. Epub 2021 Mar 6.
Ten healthy Beagle dogs were used to compare selected echocardiographic parameters of right ventricular (RV) systolic function with high field cardiac magnetic resonance imaging (MRI). All dogs underwent complete transthoracic echocardiography before and during anesthesia, as well as cardiac MRI with determination of morphology-based ejection fraction, and phase contrast angiography-derived stroke volume. A correlation analysis was carried out between echocardiographic and MRI parameters. The values of fractional area change, tricuspid annular plane systolic excursion, tissue Doppler imaging derived peak velocity of the isovolumic contraction wave and systolic wave of the lateral tricuspid valve annulus showed lower values under general anesthesia. Of all echocardiographic parameters of RV systolic function, only fractional area change (r = 0.671, P = 0.034) and tissue Doppler imaging derived peak velocity of the systolic wave of the lateral tricuspid valve annulus (r = 0.768; P = 0.01), showed a significant correlation with MRI derived stroke volume. None of the echocardiographic parameters correlated with MRI derived ejection fraction. When evaluating the RV echocardiographically, fractional area change and peak velocity of the systolic wave of the lateral tricuspid valve annulus appear to be the most reliable predictors of RV systolic function when compared to MRI under anesthesia.
十只健康的比格犬被用于比较右心室（RV）收缩功能的选定超声心动图参数与高场心脏磁共振成像（MRI）。所有犬在麻醉前和麻醉期间均接受完整的经胸超声心动图检查，以及心脏MRI检查，测定基于形态学的射血分数和相位对比血管造影得出的每搏输出量。对超声心动图和MRI参数进行了相关性分析。在全身麻醉下，面积变化分数、三尖瓣环平面收缩期位移、组织多普勒成像得出的等容收缩波峰值速度和三尖瓣环外侧收缩波峰值速度的值较低。在右心室收缩功能的所有超声心动图参数中，只有面积变化分数（r = 0.671，P = 0.034）和组织多普勒成像得出的三尖瓣环外侧收缩波峰值速度（r = 0.768；P = 0.01）与MRI得出的每搏输出量有显著相关性。没有一个超声心动图参数与MRI得出的射血分数相关。在麻醉状态下与MRI相比，当通过超声心动图评估右心室时，面积变化分数和三尖瓣环外侧收缩波峰值速度似乎是右心室收缩功能最可靠的预测指标。
