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CT FFR Limitation: Motion Artifact (Case 2)

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So this next case is interesting.

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Middle-aged patient was an inpatient admitted in part

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for chest pain at one of our hospitals

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that does not have a cath lab.

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So, uh, very reasonable first test to do.

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And what we see here is that there is a sclerosis

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and not the best of image quality you

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can imagine on an inpatient.

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Uh, maybe not the best of enhancement,

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but uh, let's try to clear what we can.

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You can see how they're a larger patient too.

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So in addition to the bolus being not the ideal bolus, um,

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it's still coming in the contrast, but it's also late.

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So I wonder if there was a Val Salva type maneuver.

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Um, but I think it's gonna be, uh, diagnostic for me.

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So yeah, I see some plaque

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and there's probably not anything significant in the uh,

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RCA so far.

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I have to be careful which phase it is tortuous,

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like just like the last case.

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But, um, maybe a slight limitation on the RCA,

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but I don't think it's fully non valuable.

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Mm. Yeah, I think we can probably say it's, uh,

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with not supreme confidence,

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but that there's nothing obviously severe.

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Uh, remember if you have a hospital at a cath lab,

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you're at least making a triage decision similar like the,

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the TAVR patient where we wanna make it.

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Just broad strokes, do you need to go further or not?

1:19

LED actually looks pretty good to me, as does the left main,

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and of course we're gonna check that in one more view.

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Looks good. So that brings us to the circumflex

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and while this is gonna be a tough, uh, valve just

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'cause of the tortuosity, the calcium,

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but non-dominant vessel

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and I just don't see that very well down here.

1:43

Sure. Wish I had a less noisy set of images.

1:47

Don't know if I can confidently say that's negative.

1:50

Um, but a lot of resource use

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to grab a calf just to confirm.

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So we wanna augment, I think I'd have

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to call this moderate actually, just based on the amount

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of plaque and the borderline narrowing here

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in this circumflex.

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So, uh, I'm gonna call it circ moderate.

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And uh, next thing I think would either do a second test,

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like a, maybe a nuclear profusion test

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or perhaps A-C-T-F-F-R.

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And of course we have that.

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Um, interestingly, they just couldn't do this

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'cause of motion or maybe the noise.

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There's some clear thresholds the, the vendor sets.

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So that's fine. It wasn't a question in my mind.

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Um, LED is cleared fine. Um, circumflex is cleared.

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So yes, there's some mild abnormalities

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and that was the area I was most concerned.

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I really thought that was moderate. I think it still is,

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it's just it's not predicted

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to be significant and that's all they needed.

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They just wanted a, uh, con in a non-dominant vessel anyway,

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you would have a hard time pursuing just that.

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But this is a adding a modicum of confidence

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that this is a negative study.

Report

Faculty

Brian Ghoshhajra, MD, MBA, MSCCT

Academic Chief, Cardiovascular Imaging and Associate Chair, Operations Analytics

Massachusetts General Hospital / Harvard Medical School

Tags

Vascular

Coronary arteries

Cardiac CT (SCCT Cat B1 Video Case)

Cardiac

CTA

CT

Angiography