Micturition syncope and defecation syncope
May. 26, 2023
Nearly 3,000 illustrations, including video clips of neurologic disorders.
Every article is reviewed by our esteemed Editorial Board for accuracy and currency.
Full spectrum of neurology in 1,200 comprehensive articles.
Listen to MedLink on the go with Audio versions of each article.
Comparison of blood flow during diastole in a normal heart (top) and a heart with mitral stenosis (bottom). In the normal heart, the open mitral valve allows blood to flow from the atrium, and the aortic valve is closed. In the heart with mitral stenosis, blood flowing from the left atrium is obstructed by the thickened and adherent mitral curtains. (Source: Cabot RC. Physical Diagnosis of Diseases of the Chest. Second edition. New York: William Wood and Company, 1903. Public domain.)