Acute Bloat

Acute bloat is the everyday name for gastric dilatation-volvulus, or GDV. The stomach fills with gas and fluid, swells, and then rotates, trapping its contents. The American College of Veterinary Surgeons describes this as a rapidly progressive, life-threatening emergency. In some patients the stomach dilates without twisting, but when volvulus occurs, the rotation presses on the main vein returning blood to the heart. That quickly weakens circulation, lowers cardiac output, damages the stomach wall, restricts breathing, and can trigger abnormal heart rhythms and shock. Veterinary guidance in German-speaking regions calls the condition Magendrehung or Torsio ventriculi and treats it as an absolute emergency.

The signs an owner usually notices first include nonproductive retching, drooling, restlessness, abdominal discomfort, and a belly that becomes visibly larger. If you see these in your dog, treat it as an emergency and contact a vet straight away. An abdominal X-ray can confirm the diagnosis by showing a classic double-bubble or C-shaped appearance. Without prompt treatment, severe tissue damage and cardiovascular collapse can cause death within hours.

Emergency care begins with intravenous fluids to support circulation and decompression of the stomach with a tube or needle. Surgery then repositions the twisted stomach, removes any dead stomach tissue or the spleen if necessary, and performs a gastropexy, which attaches the stomach wall to the body wall. The MSD Veterinary Manual notes that this step lowers the chance of recurrence from up to 80 percent to under 5 percent. Survival is not guaranteed: Today's Veterinary Practice reports surgical mortality between 10 and 36 percent, with worse outcomes tied to delayed arrival, persistently high blood lactate, stomach wall death, or removal of the spleen.

Large and giant breeds with deep, narrow chests are at the highest risk. A Purdue University study found that feeding once a day doubled the risk compared with twice-a-day meals, and that elevated feeders raised risk by 110 percent in large-breed dogs and 218 percent in giant breeds. The same research found that moistening dry food containing citric acid before feeding also increased risk, challenging the idea that wetting kibble is always protective. The MSD Veterinary Manual adds age, a lean body, fearful or aggressive temperament, and having a first-degree relative with GDV as further risk factors. A UK Pedigree Dog Health Survey found GDV caused 2.5 percent of pedigree dog deaths, with high risk in Bloodhounds, Irish Setters, and Weimaraners. For high-risk dogs such as Great Danes, vets often recommend a preventive gastropexy, sometimes performed through a small incision during neutering. Although bloat is usually a dog condition, cats, guinea pigs, and some primates can also develop it. And while exercise after eating is often blamed, many cases actually happen while a dog is resting in the late evening or at night. If your dog belongs to a high-risk breed, ask your vet whether a preventive gastropexy makes sense for your pet.