Equine Hospital, Department of Veterinary Clinical Studies, The Royal (Dick) School of Veterinary Studies and the Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, UK.
Department of Bioengineering, City, University of London, Northampton Square, London, ECV 0HB, UK.
J Vet Cardiol. 2021 Apr;34:16-28. doi: 10.1016/j.jvc.2020.12.005. Epub 2021 Jan 6.
Short-term electrocardiogram (ECG) examinations of horses may not detect paroxysmal arrhythmias. Twenty-four hour Holter equipment can be unwieldy and inconvenient for long-term use. This study evaluated a novel long-term ECG patch recorder, the Carnation Ambulatory Monitor (CAM) in horses, determining ideal placement, practicality, durability and performance.
Twenty-one adult mixed-breed horses.
Prospective observational study. Three horses had ECG patches fitted at selected sites (phase 1); the two most promising sites were used for further wear testing (phase 2) and the best site was chosen for a trial in 18 horses (phase 3), 16 of which had presented for evaluation of cardiac disease. In phase 1, the CAM was compared with a standard telemetric ECG. The CAM ECGs were analysed using proprietary software.
The most promising sites for CAM placement were the ventral midline caudal to the xiphisternum and left thorax caudal to the girth. The ventral midline was chosen for further evaluation. The CAM provided reliable and generally excellent ECG quality at rest (median quality score 4.5/5, range 3-5), over extended periods, allowing detection of arrhythmias. The ECG quality was poor during exercise (median quality score 1, range 1-5), except in three horses. In 15/17 placements in the standing horse, greater than 85% of the potential recording time was achieved.
The CAM is a convenient and well-tolerated device for evaluating equine cardiac rhythm at rest over long periods. Further evaluation of the ideal placement site during exercise may increase its diagnostic utility.
短期心电图（ECG）检查可能无法检测阵发性心律失常。24 小时动态 Holter 设备在长期使用时可能不方便。本研究评估了一种新型的长期心电图贴片记录仪，康乃馨动态监测器（CAM）在马中的应用，确定了理想的放置位置、实用性、耐用性和性能。
21 匹成年混种马。
前瞻性观察研究。3 匹马在选定部位安装了心电图贴片（第 1 阶段）；两个最有前途的部位用于进一步的磨损测试（第 2 阶段），并选择最佳部位在 18 匹马中进行试验（第 3 阶段），其中 16 匹因心脏疾病就诊。在第 1 阶段，CAM 与标准遥测心电图进行了比较。CAM 心电图使用专有软件进行分析。
CAM 放置最有前途的部位是胸骨剑突后下方的腹中线和左胸下方的胸廓。选择腹中线进行进一步评估。CAM 在休息时提供可靠且通常良好的心电图质量（中位数质量评分为 4.5/5，范围为 3-5），可延长时间，有助于检测心律失常。在运动过程中，心电图质量较差（中位数质量评分为 1，范围为 1-5），除了 3 匹马。在站立马的 15/17 个位置中，超过 85%的潜在记录时间得以实现。
CAM 是一种方便且耐受性良好的设备，可在长时间内评估马的休息时心脏节律。进一步评估运动过程中的理想放置部位可能会提高其诊断效用。
