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A rare case of myocardial infarction related to diagnostic intravascular ultrasound. | LitMetric

AI Article Synopsis

  • A 71-year-old man had a stent placed for a heart attack but developed a complication involving the sinus node artery, leading to temporary heart rhythm issues after a follow-up imaging procedure known as IVUS.
  • Despite elevated troponin levels indicating heart damage, the patient gradually recovered his heart rhythm within two weeks, with ongoing monitoring confirming some structural issues in the artery.
  • A study of 20 similar cases showed that IVUS procedures might cause low levels of myocardial injury, highlighting the need for caution when using IVUS catheters during cardiac procedures.

Article Abstract

A 71-year-old man underwent intracoronary stent implantation for acute inferior myocardial infarction (MI). Immediately after diagnostic intravascular ultrasound (IVUS) at 8 months' follow-up, an acute occlusion of the sinus node (SN) artery appeared, which developed sinus arrest with junctional escape rhythm. The serum level of high-sensitivity troponin T (TpT) was markedly elevated on the day after the procedure (2.1-32.5 ng/l), which was indicative of MI related to IVUS. Under continuous intravenous infusion of unfractionated heparin, the escape rhythm changed to lower atrial rhythm on the 4th day, and recovered to sinus rhythm on the 14th day. Coronary angiography (CAG) on 15th day showed a recanalization of the SN artery, but optical coherence tomography identified that disrupted plaque and white thrombus still existed in the ostium of the SN artery. The patient was discharged on maintenance anticoagulation therapy. We hypothesized from this case that IVUS-related myocardial injury may exist without clinical problems. Our retrospective investigation showed that the median levels of high-sensitivity TpT in 20 patients who underwent CAG and subsequent diagnostic IVUS significantly increased from 0.6 (interquartile range 0.3-1.1) to 1.6 (0.7-3.6) ng/l (P < 0.05), suggesting that IVUS may induce very low levels of myocardial injury. In conclusion, we experienced a rare case of IVUS-related MI caused by an acute occlusion of the SN artery. This case reaffirms that we should pay more attention to manipulation of IVUS catheters.

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Source
http://dx.doi.org/10.1007/s00380-013-0331-4DOI Listing

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