NAVLE（北美执业兽医考题）Day 409

单选题，正确答案是100分，非正确答案为0分，Good Luck！

An ECG in a middle-aged Pekinese dog that is shocky and weak shows the following.

What is the diagnosis?

一只出现休克和虚弱的中年北京犬的ECG如下图。诊断是什么？

A - Atrial standstill

B - Third degree atrioventricular block

C - Supraventricular tachycardia

D - Supraventricular premature depolarization

E - Sick sinus syndrome

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