Peer-reviewed veterinary case report
Open heart surgery success in small and toy dogs under 5.5 kg
By Kanemoto, Isamu et al.·Published in Veterinary surgery : VS·2010·Chayagasaka Animal Hospital, Japan·View original on PubMed →
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Original publication title: Open heart surgery with deep hypothermia and cardiopulmonary bypass in small and toy dogs.
- Species:
- dog
Plain-English summary
A group of small and toy breed dogs, all weighing less than 5.5 kg, underwent open heart surgery to treat serious heart conditions. The surgeries involved techniques like deep hypothermia and low-flow cardiopulmonary bypass to keep the dogs stable during the procedure. While two dogs sadly passed away shortly after surgery, the remaining six dogs survived and lived an average of nearly 33 months after their operations. This approach shows promise for treating heart defects in small dogs, allowing them to potentially live longer, healthier lives after surgery.
People also search for: small dog heart surgery · toy breed mitral valve treatment · open heart surgery for dogs
Abstract
OBJECTIVE: To evaluate open heart surgery with deep surface-induced hypothermia (sHT) and low-flow cardiopulmonary bypass (CPB) in small and toy-breed dogs. STUDY DESIGN: Case series. ANIMALS: Small breed dogs (n=8) weighing <5.5 kg with naturally occurring cardiac disease. METHODS: Deep sHT under isoflurane anesthesia and low-flow rate CPB with a small-volume prime circuit were used. Ventricular septal defect was closed directly in 2 dogs and severe mitral regurgitation was corrected with mitral valvuloplasty (MVP) in 5 dogs and mitral valve replacement in 1 dog. RESULTS: All dogs survived surgery; 1 dog died 6 days and 1 died 2 months after MVP. The other 6 dogs lived (mean follow-up, 32.8 months; range, 12-65 months). Mean body weight at surgery was 3.6 kg (range, 2-5.3 kg). Mean lowest esophageal temperature was 21.4 degrees C (range, 19.8-23.8 degrees C). Mean lowest pump flow volume was 29.2 mL/kg/min (range, 9.4-57.7 mL/kg/min) during aortic cross-clamping (mean, 53.5 minutes; range, 25-79 minutes). Mean hematocrit before CPB was 38.6% (range, 33-47%) and 20.3% (range, 13-24%) during CPB with a small circuit priming volume of 225-260 mL. CONCLUSION: Deep sHT with low-flow rate CPB may be used for open heart surgery in small dogs weighing <5.5 kg. CLINICAL RELEVANCE: Open heart surgery for selected congenital defects and acquired defects in small and toy-breed dogs may be successfully performed using deep sHT and CPB.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/20459489/