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Sick Sinus Syndrome in Dogs

Pet parent putting her hand on her dog's head


Sick Sinus Syndrome in dogs defines a disturbance of the normal rhythm of the heart. The electrical impulse that drives the heart beat starts in the sinoatrial (SA) node of the heart and then spreads through specialized conduction pathways. Sick sinus syndrome is the name given to a number of arrhythmias that arise because of abnormal function of the SA node. Symptoms include weakness and fainting.



Treatment should be considered where there are marked electrocardiographic changes and/or significant clinical signs such as frequent fainting. Certain drug therapies may cause temporary improvement, however the treatment of choice is to implant a permanent artificial pacemaker.

Cost to Treat: $5,000 to $15,000 for surgery and $50 to $100 per month in ongoing medications.

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Heart Health Conditions in Dogs

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