Why is the left coronary artery more affected in acute MI?

[Seph]

Hey guys,

I just read in mcphee that the anterior descending branch of the left coronary artery is the most affected artery in MI, followed by the right and left circumflex.

Does anyone know the reason for this?

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[Jamiu22]

Hey guys,

I just read in mcphee that the anterior descending branch of the left coronary artery is the most affected artery in MI, followed by the right and left circumflex.

Does anyone know the reason for this?

I'm guessing that maybe because it's longer and feeds the larger area of the three (an area with thicker muscle too i.e. areas demanding high blood flow for oxygenation)... - since this area requires higher blood flow you will get a higher chance of plaque formation. ... hence it has a higher chance of being clinically significant??

I know, a question with a question... classic.

 

[Guyton Killah]

I'm guessing that maybe because it's longer and feeds the larger area of the three (an area with thicker muscle too i.e. areas demanding high blood flow for oxygenation)... - since this area requires higher blood flow you will get a higher chance of plaque formation. ... hence it has a higher chance of being clinically significant??

I know, a question with a question... classic.

Yes. It supplies a larger portion of the heart than the right one.