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 a particularly serious type of vasovagal attack; the etiology is unknown. stretching syncope syncope associated with stretching the arms upward with the spine extended. swallow syncope syncope associated with swallowing, a disorder of atrioventricular conduction mediated by the vagus nerve.