Saunders Ashley, Gordon Sonya, Miller Matthew
Texas A&M University.
Compend Contin Educ Vet. 2009 Nov;31(11):E1-9; quiz E10.
Atrial fibrillation (AF) is the most commonly diagnosed supraventricular tachyarrhythmia in dogs. It typically develops when atrial enlargement occurs secondary to underlying cardiovascular disease. Electrocardiographically, AF is characterized by disorganized atrial electrical activity resulting in an absence of P waves and a rapid, irregular ventricular rate. The hemodynamic consequences of AF include decreased cardiac output and the development of clinical signs of heart failure. Therapeutic management focuses on controlling ventricular rate or restoring and maintaining sinus rhythm using antiarrhythmic medication and, in some cases, biphasic transthoracic electrical cardioversion. The prognosis varies and is especially guarded in the presence of significant underlying cardiac disease, such as dilated cardiomyopathy.
心房颤动（AF）是犬类中最常被诊断出的室上性快速心律失常。它通常在潜在心血管疾病继发心房扩大时发生。在心电图上，AF的特征是心房电活动紊乱，导致P波缺失以及心室率快速、不规则。AF的血流动力学后果包括心输出量降低和心力衰竭临床症状的出现。治疗管理重点在于使用抗心律失常药物控制心室率或恢复并维持窦性心律，在某些情况下还会采用双相经胸心脏电复律。预后各不相同，在存在严重潜在心脏疾病（如扩张型心肌病）时尤其不佳。
