NCIt definition : A condition in which neurally-mediated syncope occurs due to a specific circumstance,
such as micturition, defecation, coughing, or traction of the hair. (ACC/AHA);
Alternative definition : ACC/AHA: A condition in which neurally mediated syncope occurs due to a specific circumstance,
such as micturition, defecation, coughing, or traction of the hair.;