Department Small Animal Clinical Science, Virginia Maryland College of Veterinary Medicine, Blacksburg, VA, USA.
Department Small Animal Clinical Science, Virginia Maryland College of Veterinary Medicine, Blacksburg, VA, USA.
J Vet Cardiol. 2021 Jun;35:121-123. doi: 10.1016/j.jvc.2021.03.008. Epub 2021 Apr 2.
A 3-year-old female spayed indoor/outdoor Siamese cat was diagnosed with cytauxzoonosis and irregular heart rhythm was appreciated during a physical examination. On electrocardiogram, the cat had an average ventricular rate of 144 beats/min with Wenckebach type (Mobitz type I) atrioventricular block. The QRS complexes of sinus conducted beats had left anterior fascicular block morphology, they were followed by two subsequent beats presented with a prolonged P-R interval and QRS conducted with a left bundle branch block. The finding of alternating left anterior fascicular block and left bundle branch block along with atrioventricular block is consistent with trifascicular block. No structural heart changes were noted on echocardiography. Approximately 48 h after presentation to the emergency service, the cat acutely decompensated and spontaneously died.
一只 3 岁已绝育的雌性室内/外暹罗猫被诊断患有细胞立克次体病，并在体检时发现不规则心律。在心电图上，猫的平均心室率为 144 次/分钟，存在文氏型（莫氏Ⅰ型）房室传导阻滞。窦性冲动下的 QRS 波群呈左前分支阻滞形态，随后连续出现两个 QRS 波群，表现为 P-R 间期延长和左束支传导阻滞。交替出现的左前分支阻滞和左束支传导阻滞以及房室传导阻滞的发现与三分支阻滞一致。超声心动图未发现结构性心脏变化。在急诊就诊后约 48 小时，猫突然失代偿并自然死亡。
