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Evaluation of Right Ventricular Function and Dyssynchrony in a Dog Model of Acute Pulmonary Embolism : Diagnostic Utility and Reversibility

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Title: Evaluation of Right Ventricular Function and Dyssynchrony in a Dog Model of Acute Pulmonary Embolism : Diagnostic Utility and Reversibility
Authors: Morita, Tomoya Browse this author
Nakamura, Kensuke Browse this author →KAKEN DB
Osuga, Tatsuyuki Browse this author
Kawamoto, Sei Browse this author
Miki, Shingo Browse this author
Takiguchi, Mitsuyoshi Browse this author →KAKEN DB
Keywords: pulmonary hypertension
microsphere injection
speckle tracking echocardiography
Tei index
cardiac catheterization
Issue Date: 20-Jun-2022
Publisher: Frontiers Media
Journal Title: Frontiers in veterinary science
Volume: 9
Start Page: 861064
Publisher DOI: 10.3389/fvets.2022.861064
Abstract: Background: The diagnosis of acute pulmonary thromboembolism is challenging in dogs. Little has been reported on changes in echocardiographic indices in dogs with acute pulmonary thromboembolism. The objective of this study was to validate the relationship between echocardiographic indices and right heart catheterization variables in dogs with acute pulmonary embolism and to identify a useful echocardiographic index for diagnosing acute pulmonary embolism. Materials and Methods: Six healthy laboratory beagles were included in the study. Echocardiography and right heart catheterization were performed in a dog model of acute pulmonary embolism produced by microsphere injection. Echocardiographic indices, including the right ventricular (RV) Tei index, RV longitudinal strain, and the dyssynchrony index using speckle tracking echocardiography, transmitral flow, and eccentricity index, were measured. Results: The mean pulmonary arterial pressure increased (22.2 +/- 1.2 mmHg) and the blood pressure decreased after microsphere injection. Although the mean pulmonary arterial pressure remained elevated, the blood pressure recovered 2 days after the microsphere injection. Most echocardiographic indices of RV function were significantly impaired following microsphere injection and recovered after 2 days. In contrast, the RV Tei index was significantly impaired after microsphere injection and the impairment persisted after 2 days. Multivariable analysis revealed that the RV Tei index was an independent echocardiographic predictor of pulmonary vascular resistance (beta = 0.88, P < 0.001), and transmitral early diastolic wave was an independent predictor of the cardiac index (beta = -0.86, P = 0.001). Conclusions: The RV Tei index is a useful echocardiographic index for diagnosing acute pulmonary embolism. Ventricular interdependence may be an important factor causing low cardiac output in dogs with acute pulmonary embolism.
Rights: https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/86507
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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