L14:Hemodynamic disorders II Flashcards
Balance between procoagulant and anticoagulant mechanisms :
hemostasis
what is a thrombus ?
structured , solid mass composed of the blood constituents circulating in the cardiovascular system
what is the process that leads to formation of an aggregation of platelets held together by a meshwork of fibrin through activation of normal blood coagulation system ?
thrombosis
what proecess is responsible for the breakdown of the meshwork of fibrin ?
fibrinolysis
Non occlusive thrombi that forms on the wall of the heart chambers or aorta
is called :
Mural Thrombi
what are vegetations ?
thrombi on heart valves (infective or nonbacterial )
where are venous thrombus most common ?
deep veins of lower limb
venous thrombus are usually : A.)Mural or B.) Occlusive ?
occlusive
what is meant by propagation ?
Thrombus in contact with flowing blood may accumulate more platelets and fibrin, become even larger, eventually leading to vessel occlusion.
what is meant by embolism ?
Thrombus may fragment or break free, and travel to other sites producing thromboemboli.
what is meant by dissolution ?
Recent/fresh thrombus is broken down and removed by plasmin and lead to total lysis
what is an emboli ?
Any solid, liquid, or gaseous mass that travels along the bloodstream.
what is an infract ?
An area of ischemic necrosis within a tissue or an organ that is produced by occlusion of either its arterial supply or its venous drainage
what is shock?
a condition of profound hemodynamic and metabolic disturbance characterized by failure of the circulatory system to maintain adequate perfusion of vital organs.
septic shock happens most commonly due to what kind of bacteria ?
gram-negative bacteria
