Heart attacks caused by the complete blockage of a heart artery are treated by opening it with a stent. However, most people will also have 'non-culprit' narrowings found in their other arteries at this time. Although in general people do better if these non-culprit narrowings are also treated with stents if they look severe, this process has problems. This is because narrowings that look severe may be stable and not cause any trouble. For these people a stent is a wasted procedure and unnecessary risk. On the other hand, narrowings that are currently left alone because they appear mild, may progress and cause a heart attack. Participants who have had a heart attack will have a scan from inside the heart arteries during an angiogram (optical coherence tomography, OCT) and a magnetic resonance angiogram (MRA). If the investigators can show that it is possible to accurately predict which non-culprit narrowings are going to progress and which are going to stabilise, medical professionals may be able to better target their treatments after a heart attack.
Study Type
OBSERVATIONAL
Enrollment
90
Non-culprit coronary arteries
1.5T
St Thomas' Hospital
London, United Kingdom
RECRUITINGKing's College Hospital
London, United Kingdom
RECRUITINGChange in mean fibrous cap thickness measured by optical coherence tomography
Time frame: 6 months
Change in mean lipid arc measured by optical coherence tomography
Time frame: 6 months
Presence of thin cap fibroatheroma measured by optical coherence tomography
Plaque with lipid arc \>90° and fibrous cap thickness ≤65µm
Time frame: 6 months
Change in measures of shear stress made by optical coherence tomography and magnetic resonance angiography
Comparison between non-invasive and invasively derived measures
Time frame: 0 and 6 months
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