Etude des fonctions plaquettaires et de coagulation chez les amerindiens vivant en haute altitude

Abstract

Summary. Platelet functions and coagulation values of High Altitude (H.A.) residents 3.600 m.) were compared to sea level values. Highlanders are characterized by: - a thrombocytosis which is an adaptatif phenomenon - a platelet hypoagregability and a stability in the level of coagulation factors which can be considered as a consequence of chronic hypoxia as well as other environmental factors mainly nutritional factors. New comers to H.A. present a platelet hyperagregabillity and an hyper coagulability which are explained as acclimatatif phenomenon perhaps of adrenergic origin.