Defecation syncope

Defecation Syncope is a type of syncope, or fainting, that occurs during or immediately after defecation.

Definition

Defecation syncope is a subtype of vasovagal syncope or neurocardiogenic syncope that is triggered by the act of defecating. It is a form of orthostatic hypotension that can occur when the body's cardiovascular system fails to adapt quickly enough to a change in blood pressure.

Causes

The exact cause of defecation syncope is not fully understood, but it is believed to be related to a sudden drop in blood pressure. This can occur when the vagus nerve, which controls the heart rate, is stimulated during defecation. The increased pressure in the abdomen can also compress the inferior vena cava, reducing the return of blood to the heart.

Symptoms

Symptoms of defecation syncope can include lightheadedness, dizziness, and fainting during or immediately after defecation. Some people may also experience palpitations, sweating, or a feeling of warmth before fainting.

Diagnosis

Diagnosis of defecation syncope typically involves a thorough medical history and physical examination. Additional tests may be needed to rule out other causes of fainting, such as heart disease or neurological disorders. These can include electrocardiograms, echocardiograms, and tilt table tests.

Treatment

Treatment for defecation syncope focuses on preventing future episodes. This can involve lifestyle changes, such as avoiding straining during defecation and staying hydrated to maintain blood volume. In some cases, medications may be prescribed to help regulate blood pressure and heart rate.

See also

• Syncope
• Vasovagal syncope
• Orthostatic hypotension
• Vagus nerve