Vygotsky's social account of psychology is comprehensible when viewed in relation to his political views and his early work experience. A brief discussion of this context is therefore in order before explaining the details of his psychological stand- point.
1 Central cyanosis and its causes are all associated with peripheral cyanosis. 2  Decreased pumping of blood by the heart or reduced cardiac output. 3  This is seen in heart failure or circulatory shock. 4  Diseases of circulation like thrombosis or embolism. 5  Constriction of blood vessels of the limbs, fingers and toes.
Conditions that cause blue fingernails . Blue discoloration of your fingernails can be caused by problems in the lungs, heart, blood cells, or blood vessels. A list of conditions that can cause cyanosis include: Diseases of the lungs: COPD (emphysema or chronic bronchitis) Asthma; Acute respiratory distress syndrome; Pneumonia; Pulmonary embolism