Gastric dilatation-volvulus (GDV) is a life-threatening condition in dogs that has been associated with high mortality rates in previous studies. Factors were evaluated in this study for their influence on overall and postoperative mortality in 306 confirmed cases of GDV between 2000 and 2004. The overall mortality rate was 10%, and the postoperative mortality rate was 6.1%. The factor that was associated with a significant increase in overall mortality was the presence of preoperative cardiac arrhythmias. Factors that were associated with a significant increase in postoperative mortality were postoperative cardiac arrhythmias, splenectomy, or splenectomy with partial gastric resection. The factor that was associated with a significant decrease in the overall mortality rate was time from presentation to surgery. This study documents that certain factors continue to affect the overall and postoperative mortality rates associated with GDV, but these mortality rates have decreased compared to previously reported rates.

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