Behavioral & Cognitive Disorders
Dementia in Parkinson disease
Aug. 12, 2023
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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.)