Path Q1 lab hemostatics

• Normal coronary artery
• No atherosclerosis

Coronary thrombosis occludes remaing small lumem of coronary artery

• Peterchial hemorrhages seen on epicardium of heart
• Can occur with coagulopathy due to low platelet count or sudden hypoxia

• Fat embolism
• Rounded clear holes seen in pulmonary arterial branch

Pulmonary embolus in a major pulmonary artery branch

Pulmonary embolus adherent to pulmonary arterial wall

• Amniotic fluid embolism
• Here, epithelial squames seen in peripheral artery

• Lines of Zahn
• Alternating pale pink bands of platelets and fibrin and red bands of RBCs forming a thrombus

Small fibrin thrombi from widespread activation of coagulation system with DIC seen in capillary loops in glomerulus