Introduction/objective

Transient myocardial thickening (TMT) in cats is a poorly characterized clinical entity. Therefore, this study aimed to provide descriptions of additional cats diagnosed with this clinical phenomenon.

Animals, materials, and methods

For this multicenter observational retrospective study, cats diagnosed with TMT were searched in three medical databases. TMT was defined for cats with at least two echocardiograms showing an increased end-diastolic left ventricular wall thickness (LVWTd; i.e. ≥6 mm) at presentation and subsequent echocardiographic normalization (i.e. LVWTd <5.5 mm). Signalment, history, clinical, laboratory, therapeutic, and outcome data were retrieved.

Results

27 cats were included. The median age was 3 years. In 9/27 cats, an antecedent event was documented. At admission, 27/27 cats had evidence of myocardial injury (median value of cardiac troponin I 5.5 ng/mL), 25/27 cats had congestive heart failure, 13/27 cats had hypothermia, 8/27 cats had systemic hypotension, 7/27 cats had bradycardia, and 7/27 cats had electrocardiographic evidence of an arrhythmia. The median LVWTd was 6.4 mm. A potential cause of myocardial injury was identified in 14/27 cats. The median time from diagnosis to a significant reduction in LVWTd was 43 days.

Discussion

TMT can be diagnosed in a wide range of cats, including young subjects. An antecedent predisposing event and/or a possible causative trigger can be identified in some. The reduction in LVWTd that defines this phenomenon usually occurs over a variable time frame.

Conclusions

This study represents the largest investigation of TMT in cats and provides additional information on this uncommon clinical entity.

中文翻译：

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短暂性心肌增厚：对 27 只猫的病因、临床、实验室、治疗和结果结果的回顾性分析

简介/目标

猫的短暂性心肌增厚（TMT）是一种特征不明的临床疾病。因此，本研究旨在提供对被诊断患有这种临床现象的其他猫的描述。

动物、材料和方法

在这项多中心观察性回顾性研究中，在三个医学数据库中检索了被诊断患有 TMT 的猫。TMT 的定义是，至少有两次超声心动图显示就诊时舒张末期左心室壁厚度增加（LVWTd；即≥6 毫米），随后超声心动图正常化（即 LVWTd <5.5 毫米）。检索信号、病史、临床、实验室、治疗和结果数据。

结果

其中包括 27 只猫。中位年龄为 3 岁。在 9/27 的猫中，记录了一个先前事件。入院时，27/27 只猫有心肌损伤的证据（心肌肌钙蛋白 I 中位值为 5.5 ng/mL），25/27 只猫有充血性心力衰竭，13/27 只猫有体温过低，8/27 只猫有全身性低血压，7 /27 只猫有心动过缓，7/27 只猫有心律失常的心电图证据。中位 LVWTd 为 6.4 毫米。在 14/27 的猫中发现了心肌损伤的潜在原因。从诊断到 LVWTd 显着降低的中位时间为 43 天。

讨论

TMT 可以在多种猫中进行诊断，包括幼猫。在某些情况下可以识别先前的诱发事件和/或可能的触发因素。定义这种现象的 LVWTd 降低通常发生在不同的时间范围内。

结论

这项研究代表了对猫 TMT 的最大规模调查，并提供了有关这一不常见临床实体的更多信息。