quiz5 Flashcards
enlargement of the thrombus in areas open to clotting factors and their activation; therefore usually in veins where flow is slow and are bifurcations
propagation
1 cause of death in USA
Infarction
region of necrosis caused by oxygen oxygen deficiency
infarct
white infarct
develops in tissues that have 1 blood vessel supply
ie: coronary
red infarct
tissue is supplied by 2+ blood vessels
ie: lungs pulmonary and bronchial artery
most common infarction
myocardial infarction
brain infarction aka
ischemic stroke
most common area for stroke
ischemic stroke
what is followed by replacement of lost heart tissue
coagulative necrosis
what kind of necrosis happens in an ischemic stroke
liquefactive necrosis with cavity formation
what is responsible for repairing the lost brain tissue
neuroglia doesnt shrink
why is neuroglia responsible for repairing brain tissue
because if CT were responsible for repair it would further damage the brain because CT shrinks as it heals.
process of repair via neuroglia in the brain does not shrink which is a huge advantage for the brain
gliosis
MCC of infarction is
thrombosis
obstruction in basilar artery
stroke
obstruction in coronary artery
myocardial infarct
swelling of inflammed tissue due to autoimmune disease
vasculitis
most common factor that results in infarction
athrosclerosis
temporal arteritis aka
giant cell arteritis
hortons disease
acute/chronic granulomatous vasculitis
symptoms of arterial infarction
HA
arteries are visible and tender upon palpation
fever
weakness
temp loss of vision can result in blindness
NSAIDS dont work
what is the main treatment for arterial infarction
corticosteroids therapy
what often accompanied arterial infarction?
polymyalgia rheumatic
venous infarctions
paraesophegeal hernia
sheehans syndrome
stomach protrudes through diaphragm into thoracic cavity
flexion/compression of the diaphragm veins of the stomach are occluded preventing outlfow of venous blood(arteries are not occluded because the pressure is higher)
leads to increased hydrostatic pressure in the veins
paraesophegeal hernia
postpartum syndrome anterior pituitary (adenohypophysis) doesnt have an arterial blood supply and instead receives blood via venous plexus complications during delivery = hemorrhaging body responds with vasoconstriction body wide causing vasoconstriction of venous plexus supplying ant pit causing necrosis and loss of function of ant pit
sheehans syndrome
factors affecting infarction
tissues innate vulnerability to hypoxia
pattern of vascular supply
oxygen delivering capacity
rate of occulsion development
sudden occlusion of blood vessels
embolism
abnormal mass moving with the bloodstream
embolus
most common type of embolism
thromboembolism
2 types of thromboemoblism
venous
arterial
thrombus develops and can easily flow to the heart because vein lumen size increases as it approached the heart
reaches lung capillaries-stops and obstructs blood flow=infarct in lung
always ends in lung
venous thromboemoblism
thrombus forms in the left artium–> L vent–>aorta–> well blood supplied organs
arterial thromboembolism
GI thromboembolism from
GI tumors
where does it travel to first in GI thromboembolism
liver via hepatic portal vein stops in liver capillaries
sources of heart thrombus
mitral stenosis
bacterial endocarditis
artifical valve
from long bone fracture> enters venous circulation> travel towards lungs
can cross capillaries and travel in reverse direction to the brain causing purpuric brain hemorrhages
fat embolism
rare childbirth (obstetric) emergency in which amniotic fluid, fetal cells, hair, or other debris enters the mother’s blood stream via the placental bed of the uterus and triggers an allergic-like reaction.
amniotic fluid embolism (AFE)
gas within the vessels would increase pressure. blockage of fluid flow
air embolism
