heart circulation q

[Fungi121]

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So I know this sounds silly, but when someone has RCA atherosclerosis or whatever, do we assume that the posterior descending is gonna be screwed too?

I feel like this keeps popping up and I keep getting it wrong. It'll be like "oh someone's posterior ventricle is infarcted what's the cause" and the answer will be "RCA occlusion" or something. I just feel weird assuming that just cause the RCA is messed up that the PDA will be messed up too.

Thoughts?

 

[CherryRedDracul]

The PDA gets its blood supply solely from the RCA in ~85% of people, so yeah, if flow through the RCA is impaired, there's a good chance that the PDA's flow is impaired as well.

 

[Fungi121]

lol it makes perfect sense, IDK why I didn't like it! hah, thanks

 

[CherryRedDracul]

lol it makes perfect sense, IDK why I didn't like it! hah, thanks

No problem. It's on page 266 in FA 2014, FYI.