Gastric volvulus is a rare medical condition in which the stomach rotates on its mesentery. There are different etiologies and varied clinical presentations of this type of volvulus. Furthermore, it is associated with serious sequelae and therefore warrants prompt diagnosis and treatment.
The clinical picture is varied according to the degree of rotation. While mild symptoms of gastric volvulus may resemble benign abdominal conditions, the serious cases feature worrisome symptoms.
In acute presentations of gastric volvulus, the main features are severe abdominal pain, retching, and an inability to pass a nasogastric tube into the stomach . An intraabdominal gastric volvulus manifests as a sudden onset of pain in the epigastric or left upper quadrant region. An intrathoracic gastric volvulus will present as sharp pain in the chest that radiates to the left side of the neck, shoulder, arms and back.
In longstanding cases of gastric volvulus, patients experience intermittent epigastric pain accompanied by post meal abdominal fullness and distension. Further symptoms include early satiety, chest pain, dyspnea, and dysphagia.
A person with a clinical presentation such as that of acute gastric volvulus warrants an urgent evaluation composed of a full history, a thorough physical examination including cardiac and abdominal assessment, and diagnostic studies.
A confirmatory finding on chest radiograph in intrathoracic gastric volvulus is a gas-filled viscus. Abdominal radiographs will display a distended viscus in the upper abdomen. Furthermore, an organoaxial volvulus on abdominal x-ray is depicted as a horizontally positioned stomach with a single air-fluid level  whereas a mesenteroaxial volvulus is seen as a spherical stomach with 2 air-levels.
Upper GI contrast radiographs are very useful when the stomach is rotated. Specifically, this test demonstrates sensitivity and specificity , as it diagnoses 81% to 84% of cases.
CT imaging provides a prompt diagnosis as it portrays 2 bubbles with a transition line. Advocates for this study report that CT scans offer rapid results and detect other existing pathologies.
Acute gastric volvulus is associated with a high mortality rate that can be close to 80% . Hence, this is considered an emergency that requires urgent surgical intervention. In chronic cases, surgery should be done as a preventive measure to avoid complications.
The surgical procedure aims to decompress, reduce, and prevent recurrence of the condition. The etiology, presence of defects and the exact anatomy of the volvulus will all be taken into account during the surgical planning phase.
The surgeon will perform the appropriate procedures which may include repair of the diaphragm, repair of existing diaphragmatic hernia, gastropexy (whether simple or complex), partial gastrectomy, or fundoantral gastrogastrostomy .
With regards to the surgical approach, minimally invasive techniques such as laparoscopy offer a smaller risk of complications in comparison to open surgery . Furthermore, the advances made in laparoscopic surgical techniques are linked to more favorable outcomes in both acute and chronic cases .
Note that open surgery is necessary for patients with peritonitis or hemodynamic instability.
Acute cases of gastric volvulus are life-threatening and associated with a 30% to 50% fatality rate. In these cases, death has been attributed to strangulation, which results in necrosis and perforation of the stomach. Early diagnosis and intervention has reduced the mortality rate of acute volvulus to 15% to 20% and chronic cases to 0% to 13% .
Prior to discussing the causes of volvulus, it is important to understand the natural functioning and anatomy of the stomach. Normally, this organ contracts and relaxes as it breaks down food and facilitates digestion. During contractions and relaxations, the stomach moves but its movement is limited by the ligaments, nearby organs such as the spleen, and the omentum.
There are 2 types of gastric volvulus. Type 1, which is idiopathic, is the most predominant variety and is observed in adults. Some believe this is secondary to previously taut ligaments of the stomach becoming lax. These structures are the gastrosplenic, gastroduodenal, gastrophrenic, and gastrohepatic ligaments. Note that their role is to sustain the position of the stomach in the abdominal cavity.
The second type, which is found mostly in children, is comprised of congenital and acquired etiologies that contribute to the abnormal movement of the stomach. Examples of causes include 1) defects of the diaphragm (a structure that overlays the stomach), 2) adhesions or bands connected to the stomach, and 3) absence of the spleen, which results in less support for the stomach .
This disorder overall is rare. Its incidence is predominantly observed in adults over 50 as 80% to 90% of affected individuals are adults .
Note that more than 50% of pediatric cases occur in children younger than 12 months of age.
With regards to the patient demographics, gastric volvulus has not been correlated with race or gender.
The pathophysiology of gastric volvulus centers around the plane of rotation . Organoaxial gastric volvulus accounts for almost 60% of cases . This occurs when the segments of the stomach, known as the antrum and fundus, rotate in opposite directions. To explain further, the stomach twists around its main plane. This has been associated with strangulation and necrosis in 5%-28% of patients  and is likely secondary to a diaphragmatic defect.
The mesentericoaxial variant involves the axis that covers the lesser and greater curvatures. Specifically, the antrum intermittently rotates in an anterior and superior manner thereby allowing the posterior side of the stomach to face anteriorly (albeit not a complete rotation). This type is observed in almost 29% of patients . These patients experience chronic symptoms but do not suffer from vascular complications.
There is another category known as the combined type, which is chronic and rare. As the name suggests, the stomach rotates organoaxially and mesentericoaxially. This etiology is responsible for the remaining percentage of patients .
Dietary modifications are recommended for individuals with gastric volvulus both before and after treatment. For example, they should eat multiple small meals as opposed to a large meal per day. This will allow them to digest the food and extract the nutrients more efficiently. Also, post-surgery patients should avoid fried or spicy food and foods that contain fiber. To prevent constipation, increased water intake is necessary. Finally, patients who undergo partial removal of stomach or intestine may be deficient in electrolytes and vitamins. Hence, they should adhere to the replacement of these substances.
Gastric volvulus, or twisted stomach, occurs when the stomach rotates more than 180º. This rare condition is characterized by an abnormal movement of the stomach that is likely to result in the compression and compromise of the blood vessels perfusing the organ. Hence, strangulation and necrosis of affected parts of the stomach are serious potential consequences. Some of the common factors predisposing to gastric volvulus include a hiatal hernia, asplenism, a defective diaphragm,etc.
There are 2 classes of gastric volvulus according to the etiology. Type 1 is idiopathic and mainly found in adults whereas type 2 is congenital or acquired and is observed in children. Overall, gastric volvulus occurs mostly in adults and has no preference for gender or race.
The clinical picture of gastric volvulus varies and may feature symptoms that mimic digestive disorders. In acute cases, the presentation may include severe abdominal pain, radiating chest pain, retching, and other similar manifestations. Chronic cases reveal nonspecific symptoms such as intermittent epigastric pain, abdominal fullness, distension, dysphagia, etc.
Early diagnosis and intervention are paramount as untreated gastric volvulus has a high mortality rate. A complete workup is composed of the patient's history, physical examination, and key imaging studies including computed tomography (CT) imaging, radiography, and upper gastrointestinal (GI) series with contrast. These diagnostic techniques offer confirmation with characteristic findings.
Whether acute or chronic, the therapeutic approach of gastric volvulus involves the surgical correction of the volvulus in addition to the repair of associated defects that are responsible for the abnormal rotation of the stomach. Due to surgical advances, laparoscopic techniques are preferred to open surgery. Note that the surgical treatment is vital to prevent complications.
Patients are advised to adhere to dietary restrictions and modifications such as consuming smaller meals, avoiding fiber and fried foods, replenishing vitamins and electrolytes, and increasing the intake of water to prevent constipation.
What is gastric volvulus?
Who is affected?
This condition is more common in adults particularly the elderly.
About 20% of cases affect children, especially in babies under 1 year of age.
What are the causes of gastric volvulus?
The stomach twists around itself when the neighboring organs and structures are defective or absent. For example, patients may have a hiatal hernia, which is a condition caused by the upper part of the stomach entering the chest region.
Gastric volvulus is also caused when:
What are the signs and symptoms?
Depending on the degree of twisting, some patients may have mild symptoms and others will have more severe ones. The main features may include:
How is it diagnosed?
The clinician will ask the pertinent questions about the patient's symptoms and history to understand the full picture. Also, s/he will perform a physical exam and then order very important tests to determine the diagnosis.
The diagnostic studies include CT scans and/or x-rays. The CT images and x-rays typically confirm the diagnosis of gastric volvulus. Abdominal x-rays using barium contrast are also very helpful.
How is this condition treated?
In acute situations. the patient requires emergency surgery as the risk of death is very high if not recognized early and treated promptly. The surgery involves the untwisting of the stomach as well as repairing defects that caused the gastric volvulus in the first place. The surgical procedure(s) can be done either with an open incision or laparoscopically. Note that laparoscopic surgery results in better outcomes and lesser complications.
In chronic cases, the surgery is performed to prevent complications such as the death of tissue and compromise of blood supply.
Are there specific recommendations for patients with gastric volvulus?
For all patients, whether before or after surgery, there are special dietary restrictions as the patients are advised to: