Assessment of right ventricular infarction with contrast-enhanced magnetic resonance imaging.
OBJECTIVE
Evaluation of contrast-enhanced magnetic resonance imaging to assess right ventricular infarction in patients with acute inferior myocardial infarction.


BACKGROUND
Contrast-enhanced magnetic resonance imaging has been used for assessing scar tissue after left ventricular infarction. The value of contrast-enhanced magnetic resonance imaging to assess right ventricular infarction is unknown and was evaluated.


METHODS
Consecutive patients (n=18) with first acute inferior infarction were included. Resting electrocardiogram and right-sided electrocardiogram were acquired to assess right ventricular involvement. Resting cine magnetic resonance imaging was performed to evaluate right ventricular function and volumes, whereas the extent of right ventricular scar tissue was assessed by contrast-enhanced magnetic resonance imaging. Cine magnetic resonance imaging was repeated at 6-months follow-up to re-assess right ventricular function and volumes.


RESULTS
Sensitivity and specificity of magnetic resonance imaging were 100 and 78%, respectively, to detect right ventricular infarction (using the right-sided electrocardiogram as the gold standard). At 6 months follow-up, patients with scar tissue on contrast-enhanced magnetic resonance imaging showed right ventricular dilatation. Moreover, the extent of right ventricular scar tissue was linearly related to the severity of right ventricular dilatation.


CONCLUSIONS
Contrast-enhanced magnetic resonance imaging permits accurate assessment of right ventricular scar tissue. Patients with extensive right ventricular infarction demonstrate right ventricular dilatation at 6 months follow-up.
Kaandorp
Theodorus A M
TA
Departments of Radiology, Leiden University Medical Center, Leiden, The Netherlands. T.A.M.Kaandorp@lumc.nl
Lamb
Hildo J
HJ
Poldermans
Don
D
Viergever
Eric P
EP
Boersma
Eric
E
van der Wall
Ernst E
EE
de Roos
Albert
A
Bax
Jeroen J
JJ
D000328:Adult; D003287:Contrast Media; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000503:physiopathology*; D018497:Ventricular Dysfunction, Right / Q000503:physiopathology*
D003287:Contrast Media