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首页> 外文期刊>Equine and Comparative Exercise Physiology >Echocardiographic comparison of left ventricular dimensions and function after standardized treadmill exercise in trained and untrained healthy warmblood horses
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Echocardiographic comparison of left ventricular dimensions and function after standardized treadmill exercise in trained and untrained healthy warmblood horses

机译：在训练有素和未经训练的健康温血马匹中进行标准化平板运动后左心室尺寸和功能的超声心动图比较

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摘要

The purpose of the present study was to determine the influence of fitness on cardiac function, particularly on left ventricular function parameters. Fifteen healthy 'three-day event' warmblood horses were examined at rest and immediately after high-speed treadmill exercise (3% incline, 3 min 1.8 ms~(-1), 3 min 4 ms~(-1), 3 min 5 ms~(-1), 3 min 6 and 3 min 7 m s~(-1), 1.5 min 8 m s~(-1)). Horses were divided into two groups. Group 1 consisted of nine conditioned horses and group 2 included six unconditioned horses. Left ventricular dimensions and function were acquired using standardized echocardiographic indices. To assess the level of fitness, heart rate and blood lactate concentration were determined at rest and immediately after exercise. The group of conditioned horses showed a significantly lower blood lactate concentration (mean value 2.39 mmoll~(-1)) after high-speed treadmill exercise than did the group of unconditioned horses (mean value 3.81 mmoll~(-1)), which clearly revealed the difference in fitness between the two groups. During exercise the heart rate was not significantly different between both groups. Only in the recovery phase did the trained horses show a significant faster decrease in heart rate than did the untrained horses.Mean heart rate during echocardiography immediately after exercise (within the first 2 min) was 105 bpm in the group of trained horses and 113 bpm in the group of untrained horses .Within each group of horses, several echocardiographic parameters differed significantly between resting values and values after treadmill exercise. Particularly, in the group of trained horses, 17 out of 30 echocardiographic parameters (most diastolic) differed significantly between rest and exercise. In the group of untrained horses, only six out of 30 parameters were significantly different. At rest, left ventricular diameter at the apex cordis, left ventricular free wall at papillary muscle level, left ventricular volume and stroke volume, as well as fractional shortening (at the apex cordis and at papillary muscle level) were significantly different between both groups. After treadmill exercise comparison of echocardiographic parameters of the conditioned to those of the unconditioned animals showed no significant differences. In the present study, data have been provided for stress echocardiography in conditioned and unconditioned warmblood horses without any disorders of the cardiovascular system.
机译：本研究的目的是确定适应性对心脏功能的影响，特别是对左心室功能参数的影响。在静止和高速跑步机运动后立即检查了15匹健康的“三天事件”暖血马（倾斜3％，3分钟1.8 ms〜（-1），3分钟4 ms〜（-1），3分钟5 ms〜（-1），3分钟6和3分钟7ms〜（-1），1.5分钟8ms〜（-1））。马分为两组。第一组包括九匹条件马，第二组包括六匹条件马。使用标准化的超声心动图指标获取左心室的尺寸和功能。为了评估健康水平，在休息时和运动后立即确定心率和血液乳酸浓度。经过条件训练的马组在高速跑步机运动后的血乳酸浓度（平均值为2.39 mmoll〜（-1））明显低于未经训练的马组（平均值为3.81 mmoll〜（-1）），这明显地高于对照组。揭示了两组之间的健身差异。运动期间，两组的心率无明显差异。仅在恢复阶段，受过训练的马匹的心率下降速度明显快于未经训练的马匹。运动后立即（在最初的2分钟内）超声心动图检查期间，平均心率在受训练的马匹组中为105 bpm，在运动时为113 bpm在每组马中，几个超声心动图参数在静止值和跑步机运动后的值之间显着不同。特别是，在受过训练的马组中，休息和锻炼之间30个超声心动图参数中的17个（大多数舒张功能）存在显着差异。在未经训练的马群中，30个参数中只有6个具有显着差异。静止时，两组的心尖左心室直径，乳头肌水平的左心室游离壁，左心室容积和中风量以及缩短的分数（在心尖和乳头肌水平）明显不同。在跑步机上运动后，将条件动物与未条件动物的超声心动图参数进行比较，没有发现显着差异。在本研究中，已经提供了条件超声和无条件温血马在没有心血管系统疾病的情况下进行应力超声心动图检查的数据。

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