Treatment of Dilated Cardiomyopathy (DCM) in Dogs
📝 Summary
A dog's risk of heart disease rises with age, and most cases are dilated cardiomyopathy, often with shortness of breath. Early signs may be only an occasional cough - already a warning. Catch it early and treat early to avoid worse damage.
1 Treatment Approach
Treatment of dilated cardiomyopathy in dogs:
Improve congestive heart failure, increase cardiac output, and control arrhythmia. In acute failure, give oxygen and keep the dog warm; dogs with pulmonary edema need IV or subcutaneous drainage of chest fluid. In severe failure or cardiogenic shock, IV dobutamine or dopamine boosts contraction. For paroxysmal ventricular tachycardia, slowly push lidocaine at 2 mg/kg to correct rhythm; if that fails, use procainamide at 2 mg/kg.
Long-term digoxin or diltiazem lowers the ventricular rate in atrial fibrillation; target 100 to 140 bpm. For chronic failure maintenance, use furosemide to control pulmonary and abdominal fluid. Benazepril (0.5 mg/kg PO every 24h), enalapril (0.25 to 0.5 mg/kg PO every 12h), or lisinopril (0.5 mg/kg PO every 24h) are vasodilators that dampen neurohormonal activation. Pimobendan is a calcium sensitizer that strengthens contraction and dilates vessels; with furosemide and an ACE inhibitor it raises cardiac output and survival in DCM.
Supplementing carnitine and taurine has shown benefit and can extend survival. In the US, cocker spaniels with DCM respond well to taurine and carnitine; echocardiograms improved within 2 to 3 months of treatment.
Tip: Regular cardiac check-ups help catch DCM before serious symptoms appear.
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