Benito Mila, Boutigny Laure
Department of Animal Medicine and Surgery, Canine Sports Medicine Service, Veterinary School, Universidad Cardenal Herrera-CEU, 46115 Valencia, Spain.
DVM, 88220 Hadol, France.
Animals (Basel). 2020 Sep 11;10(9):1635. doi: 10.3390/ani10091635.
Bikejöring is a type of dryland mushing requiring high-intensity aerobic effort, with speed peaks close to 42 km/h. Greysters (crosses between the German Shorthaired Pointer and the Greyhound) often participate in such events and perform well. The objective of this comparative study was to evaluate the clinical use of non-invasive methods in assessing the cardiovascular health of 22 Greyster dogs in physical training, by determining the differences between different cardiovascular parameters before and after physical training. Blood pressure, heart rate and echocardiographic results were compared. The mean age of the dogs was 4.4 years ± 1.8% and 54.5% were female. All participating dogs regularly participated in bikejöring. Post-exercise increases were observed in systolic blood pressure (SBP), mean arterial pressure (MBP) and pulse pressure (SBPD), with diastolic blood pressure (DBP) remaining stable. Changes of clinical interest were observed in numerous echocardiographic variables such as left ventricle fractional shortening (LVFS), left ventricule ejection fraction (LVEF), E-point to septal separation (EPSS), cardiac output (CO), cardiac index (CI), posterior wall thickness at end-diastole (PWd) and major/minor axis ratio (MA/ma), including a decrease in the shortening fraction and an increase in EPSS after exercise. These clinical findings were observed in both males and females; they do not appear to be associated with dilated cardiomyopathy, but rather with a cardiovascular response to physical training. This study derives from the real interest of clinical veterinarians who care for highly trained canine athletes. It contributes to an increase in knowledge of the different cardiac adaptations of such dogs after intense exercise and serves to differentiate these from pathologic conditions.
自行车拉雪橇是一种旱地雪橇运动，需要高强度的有氧运动，速度峰值接近42公里/小时。格雷斯特犬（德国短毛指示犬与灵缇犬的杂交品种）经常参加此类赛事且表现出色。这项比较研究的目的是通过确定22只处于体能训练中的格雷斯特犬在训练前后不同心血管参数之间的差异，评估非侵入性方法在评估其心血管健康方面的临床应用。比较了血压、心率和超声心动图结果。这些犬的平均年龄为4.4岁±1.8%，54.5%为雌性。所有参与的犬都定期参加自行车拉雪橇运动。运动后收缩压（SBP）、平均动脉压（MBP）和脉压（SBPD）升高，舒张压（DBP）保持稳定。在许多超声心动图变量中观察到了具有临床意义的变化，如左心室缩短分数（LVFS）、左心室射血分数（LVEF）、E点至室间隔距离（EPSS）、心输出量（CO）、心脏指数（CI）、舒张末期后壁厚度（PWd）和长轴/短轴比值（MA/ma），包括运动后缩短分数降低和EPSS增加。这些临床发现在雄性和雌性犬中均有观察到；它们似乎与扩张型心肌病无关，而是与对体能训练的心血管反应有关。这项研究源于照顾训练有素的犬类运动员的临床兽医的实际兴趣。它有助于增加对此类犬在剧烈运动后不同心脏适应性的了解，并有助于将这些与病理状况区分开来。
