Department of Internal Medicine, Veterinary Faculty, Bursa Uludag University, Bursa, Turkey.
Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
J Small Anim Pract. 2024 Nov;65(11):830-837. doi: 10.1111/jsap.13765. Epub 2024 Aug 6.
A 10-year-old golden retriever was presented for the evaluation of exercise intolerance. Physical examination and laboratory tests showed no abnormalities except for mild anaemia. Standard transthoracic echocardiography revealed dilated coronary sinus, raising suspicion of a persistent left cranial vena cava, and the persistency of this anomaly was confirmed by agitated-saline study. Right ventricular echocardiographic parameters did not change significantly, while conventional parameters and global longitudinal strain analysis revealed left ventricular systolic dysfunction. Moreover, post-systolic shortening and early systolic lengthening were detected by two-dimensional speckle tracking echocardiography. This report shows that post-systolic shortening and early systolic lengthening may be useful diagnostic markers indicating regional left ventricular systolic dysfunction. Further studies are needed to elucidate whether persistent left cranial vena cava contributes to left ventricular systolic dysfunction or is an accidental benign finding in dogs.
一只 10 岁的金毛猎犬因运动不耐受而就诊。除了轻度贫血外，体格检查和实验室检查均未见异常。标准经胸超声心动图显示扩张的冠状窦，提示永存左上腔静脉的可能性，通过生理盐水激发试验证实了该异常的持续性。右心室超声心动图参数无明显变化，而常规参数和整体纵向应变分析显示左心室收缩功能障碍。此外，二维斑点追踪超声心动图检测到收缩后缩短和早期收缩伸长。本报告表明，收缩后缩短和早期收缩伸长可能是诊断左心室局部收缩功能障碍的有用指标。需要进一步的研究来阐明永存左上腔静脉是否导致左心室收缩功能障碍，或者是否是犬只中偶然的良性发现。
