Functional end arteries have limited collateral circulation. What is the likely consequence if such an artery becomes occluded?

Functional end arteries have limited collateral circulation. What is the likely consequence if such an artery becomes occluded?

• A. Immediate necrosis of the entire heart
• B. Insufficient blood flow to the tissue supplied
• C. Enhanced blood flow from adjacent arteries
• D. No effect due to alternate routes

Answer: (B)

Functional end arteries supply their tissue with little backup from neighboring vessels. When such an artery becomes occluded, there isn’t enough alternative perfusion to maintain blood flow to that tissue, so it becomes ischemic. If the blockage persists, the affected area can progress to infarction or necrosis. This is why the likely consequence is insufficient blood flow to the tissue supplied. The idea of immediate whole-heart necrosis, enhanced flow from adjacent arteries, or no effect due to alternate routes doesn’t fit because collateral circulation is limited and cannot fully compensate for the blockage.

Functional end arteries supply their tissue with little backup from neighboring vessels. When such an artery becomes occluded, there isn’t enough alternative perfusion to maintain blood flow to that tissue, so it becomes ischemic. If the blockage persists, the affected area can progress to infarction or necrosis. This is why the likely consequence is insufficient blood flow to the tissue supplied. The idea of immediate whole-heart necrosis, enhanced flow from adjacent arteries, or no effect due to alternate routes doesn’t fit because collateral circulation is limited and cannot fully compensate for the blockage.