Resolution of sustained narrow complex ventricular tachycardia and tachycardia-induced cardiomyopathy in a Quarter Horse following quinidine therapy

作者：Stern Joshua A^*; Doreste Yamir R; Barnett Susan; Lahmers Sunshine M; Baumwart Ryan D; Seino Kathy K; Bonagura John D

来源：Journal of Veterinary Cardiology, 2012, 14(3): 445-451.

DOI：10.1016/j.jvc.2012.05.004

• Equine
• Systolic dysfunction
• Quinidine
• Arrhythmia
• Tachycardiomyopathy

Sustained narrow-QRS tachycardia of three months duration and left ventricular systolic dysfunction were identified in a fifteen-year-old Quarter Horse. No underlying cause for the tachyarrhythnnia was found and no predisposing structural cardiac lesions were evident by echocardiography. Intravenous diltiazem and lidocaine were administered without achieving successful conversion of the arrhythmia. Oral quinidine therapy converted the tachyarrhythmia to sinus rhythm. Ventricular systolic dysfunction and chamber dilatation subsequently resolved. As with other species, echocardiographic features of dilated cardiomyopathy can be tachycardia-induced and may resolve following successful control of heart rate and rhythm. Published by Elsevier B.V.

• 出版日期2012-9