Common types of UC include: 1  proctosigmoiditis, which affects the rectum and lower portion of the colon. 2  left-sided colitis, which affects the left side of the colon beginning at the rectum.  total colitis, which affects the entire large intestine.
Vasovagal syncope. Vasovagal syncope is a sudden loss of consciousness mediated by the vagus nerve. It occurs when the vagus nerve is overreactive to certain triggers, such as the sight of blood or extreme emotional distress, and causes a sudden drop in blood pressure.
Neurocardiogenic syncope, also called the common faint or vasovagalsyncope, occurs in 25 to 40 percent of the people who have syncope.These episodes are related to problems with both the heart and thenervous system.3. Neurologic syncope is related to problems with the nervous system,such as seizures.4.