Clinical safety of magnetic resonance imaging early after coronary artery stent placement.
OBJECTIVE
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.
Gerber
Thomas C
TC
Division of Cardiovascular Diseases, Mayo Clinic, Jacksonville, Florida 32224, USA. gerber.thomas@mayo.edu
Fasseas
Panayotis
P
Lennon
Ryan J
RJ
Valeti
Venkata U
VU
Wood
Christopher P
CP
Breen
Jerome F
JF
Berger
Peter B
PB
D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary; D004869:Equipment Safety; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000009:adverse effects*; D008297:Male; D008499:Medical Records; D008875:Middle Aged; D008910:Minnesota; D009203:Myocardial Infarction / Q000473:pathology / Q000628:therapy*; D011184:Postoperative Period; D012189:Retrospective Studies; D015607:Stents; D013927:Thrombosis / Q000453:epidemiology* / Q000209:etiology