Juvenile ventricular arrhythmias in the absence of structural heart disease have been characterized in a small number of canine breeds with limited long-term follow up. The objective of this study was to describe the clinical outcome of dogs with JVA presenting to a university teaching hospital. Twenty five dogs, less than two years old with idiopathic ventricular arrhythmias were retrospectively identified via a medical record search. Young dogs with ventricular arrhythmias were excluded if they had structural heart disease, systemic illness, or an abnormal troponin (if performed). Electrocardiographic and Holter monitor data was evaluated for arrhythmia frequency and complexity at the time of diagnosis and over time. Long-term follow up was achieved through client and primary veterinarian contact. Breeds included German Shepherd (eight), Boxer (four), Great Dane (three), mixed breed (two) and one each of the following: Anatolian Shepherd, French Bulldog, golden retriever, Great Pyrenees, Labrador retriever, Shiloh Shepherd, miniature Poodle and Siberian Husky. The average age at diagnosis was 7.9 months (range, 2–22 months). The overall median survival was 10.96 years (range, 1.75–15.66 years). There was an average reduction in the number of ventricular beats by 86.7 % per year (P value −0.0257) based on Holter data. In most cases, idiopathic juvenile ventricular arrhythmias had a favorable long-term prognosis with reduced ectopy over time in this case series. Juvenile ventricular arrhythmias remains a diagnosis of exclusion but can be considered in a broader range of dog breeds than previously described.

中文翻译：

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25只犬特发性幼年室性心律失常的临床结果

少数犬类品种存在无结构性心脏病的幼年室性心律失常，但长期随访有限。本研究的目的是描述在大学教学医院就诊的患有 JVA 的狗的临床结果。通过医疗记录检索，回顾性地发现了 25 只不到两岁的患有特发性室性心律失常的狗。如果患有室性心律失常的幼犬患有结构性心脏病、全身性疾病或肌钙蛋白异常（如果进行），则被排除在外。在诊断时和一段时间内评估心电图和动态心电图监测数据的心律失常频率和复杂性。通过客户和主要兽医的接触实现了长期随访。品种包括德国牧羊犬（八只）、拳师犬（四只）、大丹犬（三只）、混种犬（两只）以及以下各一只：安纳托利亚牧羊犬、法国斗牛犬、金毛猎犬、大比利牛斯犬、拉布拉多猎犬、夏洛牧羊犬、小型犬贵宾犬和西伯利亚哈士奇。诊断时的平均年龄为 7.9 个月（范围：2-22 个月）。总体中位生存期为 10.96 年（范围：1.75-15.66 年）。根据 Holter 数据，心室搏动次数平均每年减少 86.7%（P 值 -0.0257）。在大多数病例中，特发性青少年室性心律失常具有良好的长期预后，在本病例系列中随着时间的推移，异位性减少。幼年型室性心律失常仍然是一种排除性诊断，但可以在比之前描述的更广泛的犬种中考虑。