... Chapter 035. Hypoxia and Cyanosis (Part 5) PERIPHERAL CYANOSIS Probably the most common cause of peripheral cyanosis is the normal vasoconstriction ... results in pallor and coldness, and there may be associated cyanosis. Venous obstruction, as in thrombophlebitis, dilates the subpapillary venous plexuses and thereby intensifies cyanosis. Approach ... acquired and associated with a variety of disorders, including cyanotic congenital heart disease (see above), infective endocarditis, and a variety of pulmonary conditions (among them primary and...