AI Article Synopsis
- A seven-year-old Labrador Retriever, previously fitted with a transvenous pacemaker for atrial issues, was brought in for emergency treatment due to suspected pacemaker failure after five years.
- Upon examination, the dog exhibited a very low heart rate and tests revealed no normal or paced heart activity, confirming a malfunction in the pacemaker's lead.
- After finding a fractured and excessively coiled lead via X-rays, the veterinarians opted to install a new epicardial pacing system, and while the dog had no immediate complications post-surgery, it eventually needed increased cardiac treatment and was euthanized two years later.
Article Abstract
A seven-year-old male castrated Labrador Retriever presented emergently due to concern for pacemaker malfunction five years after successful transvenous pacemaker implantation to treat partial atrial standstill. On presentation, the dog's pulse rate was 30-50 beats per minute. An electrocardiogram showed no spontaneous atrial activity or paced ventricular activity. Pacemaker interrogation revealed an increased impedance of 7557 ohms, indicating a lead malfunction. Thoracic radiographs confirmed the lead was fractured and had excessive coiling. The transvenous pacing system was turned off, left in place, and an epicardial pacing system was implanted the following day. The dog was discharged with no perioperative complications. The dog eventually required escalated medical therapy for progressive cardiac disease and was euthanized two years after implantation of the replacement pacemaker. This manuscript illustrates a complete lead fracture and excessive lead coiling, which has not previously been detailed in veterinary medicine.
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| http://dx.doi.org/10.1016/j.jvc.2024.02.004 | DOI Listing |
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