Transvenous demand Pacemaker Treatment for intermittent complete Heart Block in a Cat

Area of Science:

• Veterinary Cardiology
• Comparative Medicine

Background:

• Recurrent syncopal episodes in cats can indicate serious underlying cardiac conditions.
• Complete heart block leading to ventricular asystole presents a significant risk of sudden death.

Purpose of the Study:

• To describe the successful implantation of a transvenous ventricular demand pacemaker system in a cat with complete heart block.
• To evaluate the efficacy of pacemaker implantation in resolving syncopal episodes associated with bradycardia.

Main Methods:

• A 13-year-old domestic shorthaired cat with documented intermittent ventricular asystole and hyperthyroidism underwent implantation of a unipolar transvenous ventricular demand pacemaker (VVIM) system.
• The pacemaker lead was inserted via the jugular vein, tunneled subcutaneously, and connected to a generator placed in an abdominal pocket.

Main Results:

• The implanted pacemaker effectively managed the complete heart block and ventricular asystole.
• No syncopal episodes recurred during an 18-month follow-up period post-implantation.

Conclusions:

• Transvenous pacemaker implantation is a viable and effective treatment for syncopal episodes caused by complete heart block in cats.
• Pacemaker therapy offers a long-term solution for managing bradyarrhythmias and preventing syncope in feline patients.