haemodynamic disorders Flashcards
thrombosis, embolism and infarction: define thrombosis, embolism and infarction; recall the causes and possible consequences of each
define thrombosis
abnormal blood clot formation in circulatory system
3 causes of thrombosis
endothelial injury, stasis or turbulent blood flow, hypercoagubility
most common causes for venous thrombosis
stasis or turbulent blood flow, hypercoagubility
where do most venous thrombosis form
deep leg veins
what can venous thrombosis cause in deep leg veins
pulmonary embolism
most common cause for arterial thrombosis
endothelial injury such as plaque formation
what does narrowing of an artery cause
ischaemia of tissue
what does occlusion of an artery cause
infarction of tissue
what are the 5 fates of thrombi
propagation, embolization, dissolution, organisation, recanalization
define embolus
abnormal material within circulatory system carried to site distant from origin which can lodge and block vessels
most common type of embolus
fragments of dislodged thrombus, forming a thromboembolism
other rarer types of embolus
fat, air, amniotic fluid, tumour
define pulmonary thromboembolism
a thrombus which has migrated from deep leg veins to the pulmonary artery, blocking it
symptoms of major, medium and small pulmonary thromboembolism
major causes instantaneous death, medium causes shortness of breath, small causes subtle shortness of breath, chest pain, dizziness
define infarct
area of ischemic necrosis caused by occlusion to arterial supply or venous drainage
