ARTICLE
Clinical safety of magnetic resonanceimaging early after coronary artery stent placement
Thomas C. Gerber, MD, FACC*,*,
Panayotis Fasseas, MD ,
Ryan J. Lennon, MS ,
Venkata U. Valeti, MD,
Christopher P. Wood, MD ,
Jerome F. Breen, MD and
Peter B. Berger, MD, FACC
* Division of Cardiovascular Diseases and Department of Radiology, Mayo Clinic, Jacksonville, Florida, USA
Division of Cardiovascular Diseases and Internal Medicine, Rochester, Minnesota USA
Division of Biostatistics, Rochester, Minnesota USA
Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
Manuscript received February 6, 2003;
revised manuscript received May 21, 2003,
accepted May 30, 2003.
* Reprint requests and correspondence: Dr. Thomas C. Gerber, Division of Cardiovascular Diseases, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA.
gerber.thomas{at}mayo.edu
OBJECTIVES: Our aim was to examine the rate of adverse cardiac events in patients undergoing magnetic resonance imaging (MRI) <8 weeks after coronary stent placement.
BACKGROUND: The risk of coronary stent thrombosis from dislodgement due to MRI early after stent placement is not well defined. Manufacturers recommend postponing MRI studies until eight weeks after coronary stent placement.
METHODS: We analyzed the Mayo Clinic Rochester Percutaneous Coronary Intervention Database and examined records of 111 patients who underwent MRI <8 weeks after coronary stent placement treated with aspirin and a thienopyridine. Occurrence of death, myocardial infarction (MI), and repeat revascularization within 30 days of MRI were recorded.
RESULTS: Magnetic resonance imaging (1.5 tesla) was performed within a median of 18 days (range, 0 to 54 days) after coronary stent placement. Four noncardiac deaths occurred, and three patients had repeat revascularization procedures. Stent thrombosis did not occur (95% confidence interval, 0% to 3.3%).
CONCLUSIONS: Magnetic resonance imaging <8 weeks after coronary stent placement appears to be safe, and the risk of cardiac death or MI due to stent thrombosis is low. Postponing MRI does not appear to be necessary.
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Abbreviations and Acronyms
| | CAS(s) | = coronary artery stent(s) | | MI | = myocardial infarction | | MRI | = magnetic resonance imaging |
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