Gastric dilatation-volvulus (Torsio ventriculi)
- Synonyms: Gastric Dilatation-Volvulus complex, Gastric Bloat-Volvulus Complex, Dilatatio et Torsio ventriculi
- Occurrence: common
- Location of disease: Abdomen/pelvis
When to visit the vet?
Emergency see a veterinarian immediately
Definition
Gastric Dilatation-Volvulus (GDV) in dogs is an acute, life-threatening syndrome in which there is initially a massive gas and/or content overdistension of the stomach (dilation), followed by a rotation of the stomach around its longitudinal axis (volvulus). Due to the rotation, the transition from the esophagus to the stomach and the transition from the stomach to the duodenum are functionally closed; the emptying of gas and contents is no longer possible. At the same time, venous and arterial vessels, especially the gastric vessels and the portal vein drainage, are compressed. This results in:
- rapidly progressing gastric overdistension,
- severe cardiovascular instability (shock),
- tissue hypoperfusion leading to necrosis of the stomach wall and spleen,
- systemic inflammatory response of the body, reperfusion injury, and coagulopathy
Typically, large-breed, deep-chested dogs are affected (e.g., Great Dane, German Shepherd, Doberman, Gordon Setter, Weimaraner), but any breed, including mixed breeds and medium-sized dogs, can develop the condition. The age of onset is often in middle to older age, but younger animals are not excluded.
The displacement of the stomach parts leads to a characteristic radiographic image (“double-bubble”). Without rapid stabilization and surgical intervention, GDV leads to Death within a few hours.
Das Wichtigste auf einen Blick
Gastric Dilatation-Volvulus (GDV) is a peracute, life-threatening emergency in dogs. It is characterized by massive gastric overdistension and rotation, associated with compression of blood vessels. Clinically, Restlessness, unsuccessful Gagging, rapid Abdominal distension, and Cardiovascular collapse dominate. Diagnosis is confirmed clinically and radiologically (right-lateral abdominal X-ray). Critical for Therapy are immediate circulatory stabilization and gastric decompression, as well as timely surgical intervention with fixation of the stomach (gastropexy) and, if necessary, removal of necrotic areas. The outcome largely depends on the time to Therapy, the extent of ischemic damage, and perioperative management. A correctly performed gastropexy significantly reduces recurrence / relapse. Preventative measures include feeding management and, for high-risk patients, possibly prophylactic gastropexy.
Ursachen
GDV is multifactorial; there is no single cause. Relevant risk factors and triggers:
- Deep, narrow chests favor pathological mobility of the stomach.
- Familial clustering suggests a genetic predisposition (connective tissue properties, motility-relevant genes).
Age
- Increasing age correlates with reduced gastric motility, laxer ligamentous apparatus, and possibly altered tone of the lower esophageal sphincter.
Feeding Factors
- Large single meals (especially once-daily feeding).
- Bolting/rapid eating, competition for food, stress during feeding.
- Immediate, intense exercise shortly after feeding.
- Food properties (very energy-dense, high-fat rations, highly swelling dry food) are discussed; the evidence is inconsistent. The interaction of eating behavior, gastric filling, and motility seems to be crucial.
Behavior and Stress
- Anxiety, Restlessness, Stress, or changes in the environment increase the risk of influencing stomach movement and the tendency to swallow air through autonomic effects.
Previous episodes of gastric gas accumulation increase the GDV risk.
Symptoms
Clinical signs often develop peracute within 1–6 hours. Early signs include Restlessness, positional changes, Panting, and Anxiety. Excessive salivation, repeated unsuccessful Gagging, “dry heaving” (Vomiting not possible) follow. Abdominal distension rapidly occurs, primarily in the cranial left area. The abdomen can be so distended that a hollow percussion sound is produced upon light tapping. There is an increasing strain on the cardiovascular system, which manifests as an increased heart rate (tachycardia) and pale to cyanotic mucous membranes. The capillary refill time (CRT) is usually significantly prolonged. The legs feel cool, and the pulse is weak. Cardiovascular collapse or brief unconsciousness are possible.
Diagnose
Depending on the stage, the Diagnosis can often be made based on the typical Symptoms. An X-ray in right Lying on side can confirm the suspicion. Pre- and postoperative laboratory Diagnosis is essential. Typically, the following are measured: Hct, lactate (severity/prognosis marker), electrolytes, kidney values, liver enzymes, and glucose. Blood gases provide information about oxygen supply and the body’s acid-base status. Urinalysis provides information about renal perfusion; the excretion of muscle pigment (myoglobinuria) indicates muscle cell breakdown (rhabdomyolysis). If a coagulopathy/DIC is suspected, various coagulation parameters (PT/aPTT, possibly thromboelastography) are measured.
Therapie
Therapy is time-critical and requires immediate cardiovascular stabilization and timely surgical intervention with definitive gastropexy.
For acute stabilization, shock Therapy and gastric decompression are necessary.
Shock Therapy
Rapid volume Therapy with isotonic crystalloids is performed (bolus, e.g., 20–30 ml/kg, titrated according to perfusion). Hypertonic NaCl (3–5 ml/kg) may be considered in severe shock in combination with colloids or blood products. Oxygen administration (flow-by, nasal catheter, or oxygen cage) is usually required. Early pain therapy / analgesic therapy (analgesia with highly potent opioids, e.g., methadone, fentanyl) is necessary.
Gastric Decompression
Gastric decompression is performed, if still possible, using a gastric tube. If this is not possible, percutaneous decompression is performed using a trocar in the cranial abdominal area, to the left behind the last rib, in the upper part of the costal arch. If there are difficulties with the tube or in very unstable patients, a gastric tube can often be successfully placed after decompression with a trocar or a large-bore cannula. Trocarization reduces pressure, improves perfusion, and facilitates anesthesia induction.
Surgical Intervention
After initial stabilization, surgical intervention must be performed as early as possible. The earlier the surgery, the better the chances of success.
Adjunctive Therapy
- Antiemetics/prokinetics: cautiously preoperatively, often useful postoperatively (metoclopramide infusion, alternatively erythromycin in low dosage).
- Proton pump inhibitors (e.g., omeprazole) and sucralfate for ulcer risk.
- Broad-spectrum antibiotics: Indicated for ischemia/necrosis, perforation, or high Sepsis risk; protocols vary in uncomplicated cases.
- Electrolyte and acid-base correction.
- ECG monitoring; Lidocaine-CRIs for significant ventricular arrhythmia and hemodynamic relevance.
Postoperative Care
- Intensive monitoring for 24–48 h: ECG (arrhythmias common in the first 12–36 h), blood pressure, temperature, pain score, fluid balance.
- Continuation of analgesia (opioids; possibly local analgesia/CRI).
- Circulatory and coagulation monitoring; lactate trend can be prognostically helpful.
- Early enteral nutrition (as soon as antiemetic stable, starting with small, frequent meals), prokinetics as needed.
- Antacids/mucosal protection, antiemetic Therapy, thrombosis prophylaxis depending on risk.
Possible Complications and Management
- Cardiac arrhythmia (arrhythmias), administration of lidocaine or sotalol depending on type,
- Ileus/paresis,
- Wound complications,
- Peritonitis/Sepsis,
- acute kidney injury,
- coagulopathy.
Prognose und Nachsorge
The Prognosis is highly dependent on the timing of care and the standard of care.
Worsening of Prognosis due to:
- Pronounced tissue necrosis in the stomach, associated with partial or complete removal of the stomach (resection),
- Gastric perforation (Perforation/Sepsis),
- unmanageable severe arrhythmias and
- therapy-resistant hypotension
Aftercare
- Feeding: small, frequent meals, easily digestible, gradually increased.
- Activity: initial rest, gradual increase in activity; avoidance of running/jumping immediately after feeding.
- Wound checks, suture removal depending on material/protocol.
- Arrhythmia control,
- Electrolyte monitoring,
- Owner education about early warning signs (Restlessness, Gagging without Vomiting, Abdominal distension, Panting).
Long-term quality of life is very good after successful care and without extensive necrosis.
Prävention
Gastric Dilatation-Volvulus is a life-threatening emergency that can develop within a few hours. Although not all risk factors are fully known, targeted prevention measures can significantly reduce the risk and enable early detection of signs.
Feeding Management
A central aspect of prevention concerns the manner of feeding:
- Several small meals a day are better than one large meal. This distributes stomach contents more evenly and avoids excessive gas formation.
- The dog should be able to eat calmly and relaxed – without food envy or competition.
- Hasty bolting promotes air swallowing (aerophagia). Special anti-gulping bowls or spreading food on a flat surface can help.
- After eating, at least one hour of rest should be observed – no wild playing, jumping, or running.
- Even before feeding, the dog should not be immediately heavily exercised or agitated.
Food Composition
Food quality can play a role:
- Highly digestible, balanced rations are to be preferred, as they trigger fewer unwanted fermentation processes in the gastrointestinal tract.
- Very high-fat or highly fermentable components can promote gas formation.
- Food changes should be made slowly and over several days to avoid abruptly altering the intestinal flora.
Stress Reduction
Psychological factors demonstrably influence stomach function. Persistent agitation, Stress, or Anxiety can impair gastric motility and promote gas formation. A calm feeding environment, clear routines, and gentle daily training have a preventive effect.
Physical Constitution and Genetic Factors
Large dogs with deep chests (e.g., Great Dane, Weimaraner, Setter, Doberman, Irish Wolfhound) carry a particularly high risk. A familial clustering is also considered an indication of a genetic predisposition.
For such dogs, it is advisable to discuss preventive measures with the veterinarian. This includes, in particular, the possibility of prophylactic gastric fixation (gastropexy).
Surgical Prophylaxis – Prophylactic Gastropexy
Gastropexy is a surgical procedure in which the stomach is attached to the abdominal wall to prevent rotation of the stomach.
- It is often performed laparoscopically-assisted (minimally invasive, via small incisions) and is considered a gentle procedure with a short recovery time.
- The procedure does not prevent bloat but significantly reduces the risk of life-threatening rotation.
- Especially in dogs with a high genetic or anatomical predisposition, prophylactic gastropexy may be advisable during castration / neutering or other operations.
Early Detection and Vigilance
Despite all precautions, vigilance remains crucial.
Any noticeable Abdominal distension, unsuccessful Gagging, severe Restlessness, or rapid Panting after eating is always an emergency. Immediate veterinary examination can be life-saving.
Gastric Dilatation-Volvulus cannot always be prevented, but consistent management, calm feeding, thoughtful nutrition, Stress avoidance, and, if necessary, a prophylactic surgical measure can significantly reduce the risk. Especially for at-risk breeds, an individual risk assessment and veterinary consultation are worthwhile.
Ausblick auf aktuelle Forschung
The following areas are particularly important for the future:
-
Genetics & Body Conformation (phenotype):
Researchers are looking for heritable risk markers and easily measurable physical characteristics (e.g., ratio of chest depth to width, specific angles of the skeleton). From this data, risk scores are to be developed to identify at-risk dogs earlier. -
Gastrointestinal Tract Motility:
The pacemaker cells of the intestine (interstitial cells of Cajal), the enteric nervous system, and its neurotransmitters are being investigated. The goal is to develop drugs to stimulate intestinal movement (prokinetics) that act specifically and have fewer side effects. -
Intestinal flora & Gas Formation (Microbiome):
Research is being conducted into which bacteria in the intestine produce gas, how food, stress hormones, and air swallowing (aerophagia) influence this, and whether the risk can be favorably influenced by pre- and probiotics. -
Around the Operation (perioperative management) and Faster Recovery:
Standardized “Enhanced Recovery After Surgery” programs aim to reduce complications. These include early feeding after surgery, combined pain therapy / analgesic therapy (to reduce side effects), and targeted fluid management. -
Imaging & Monitoring:
Easily applicable examination procedures for practice, lactate trend monitoring (as an indicator of perfusion and severity), and better methods to reliably assess during surgery whether the stomach wall is still sufficiently perfused and viable are being developed. -
Minimally Invasive Surgical Techniques:
Laparoscopically-assisted (keyhole) procedures, e.g., prophylactic fixation of the stomach to the abdominal wall (gastropexy), are intended to shorten recovery time. Endoscopic fixations are also being investigated for the future – long-term durability and safety still need to be reliably confirmed here.