Key result
Acute myocardial infarction was an independent predictor of a spotty calcification pattern on intravascular ultrasound compared to stable presentations (OR 2.9).
Why the study?
Does intravascular ultrasound (IVUS) identify differences in coronary calcification patterns and arterial remodeling between patients with acute myocardial infarction, unstable angina, and stable angina?
Does intravascular ultrasound (IVUS) identify differences in coronary calcification patterns and arterial remodeling between patients with acute myocardial infarction, unstable angina, and stable angina?
IVUS can identify vulnerable plaques by detecting a spotty pattern of calcification and positive remodeling, which are characteristic of culprit lesions in acute myocardial infarction.
Answers are grounded in this paper and cite their sources.
Spotty calcification on IVUS may mark vulnerable plaques in AMI; hypothesis-generating and should not yet change practice.
Calcification is a common finding in human coronary arteries. However, there is conflicting evidence for a link between calcification and plaque instability. Current intravascular ultrasound (IVUS) technology allows a definitive detection of the calcification and measurement of the vessel wall. Using preinterventional IVUS images, we clarified that in patients with acute myocardial infarction, small "spotty" calcifications prevailed, associated with a fibrofatty plaque and positive remodeling. Conversely, in patients with stable angina pectoris, extensive calcification was frequent. IVUS allows the detection of vulnerable plaques in coronary arteries, by identifying not only a large lipid core and positive remodeling, but also a spotty pattern of calcification.
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Ehara et al. (2006) conducted a review in Coronary artery disease (AMI, UAP, SAP) (n=178). Acute myocardial infarction (AMI) vs. Stable angina pectoris (SAP) / Unstable angina pectoris (UAP) was evaluated on Spotty calcification pattern on intravascular ultrasound (OR 2.9, 95% CI 1.18-7.02, p=<0.05). Acute myocardial infarction was an independent predictor of a spotty calcification pattern on intravascular ultrasound compared to stable presentations (OR 2.9).
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