Published online before print August 2, 2004, doi: 10.1161/01.CIR.0000138927.00357.FB
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(Circulation. 2004;110:835-842.)
© 2004 American Heart Association, Inc.
Original Articles |
Comparison of Dobutamine Stress Magnetic Resonance, Adenosine Stress Magnetic Resonance, and Adenosine Stress Magnetic Resonance Perfusion
From the Department of Internal Medicine/Cardiology, German Heart Institute, Berlin, Germany (I.P., R.G., M.N., E.F., E.N.); Department of Internal Medicine/Cardiology, University of Freiburg, Freiburg, Germany (C.J.); and Department of Cardiology, Swiss Cardiovascular Center, Bern, Switzerland (A.W.).
Correspondence to Ingo Paetsch, MD, Internal Medicine/Cardiology, German Heart Institute Berlin, Augustenburger Platz 1, 13353 Berlin, Germany. E-mail paetsch{at}dhzb.de
Received November 25, 2003; de novo received February 28, 2004; revision received April 15, 2004; accepted April 5, 2004.
Background— Dobutamine stress MR (DSMR) is highly accurate for the detection of inducible wall motion abnormalities (IWMAs). Adenosine has a more favorable safety profile and is well established for the assessment of myocardial perfusion. We evaluated the diagnostic value of IWMAs during dobutamine and adenosine stress MR and adenosine MR perfusion compared with invasive coronary angiography.
Methods and Results— Seventy-nine consecutive patients (suspected or known coronary disease, no history of prior myocardial infarction) scheduled for cardiac catheterization underwent cardiac MR (1.5 T). After 4 minutes of adenosine infusion (140 µg · kg–1 · min–1 for 6 minutes), wall motion was assessed (steady-state free precession), and subsequently perfusion scans (3-slice turbo field echo-echo planar imaging; 0.05 mmol/kg Gd-BOPTA) were performed. After a 15-minute break, rest perfusion was imaged, followed by standard DSMR/atropine stress MR. Wall motion was classified as pathological if 
1 segment showed IWMAs. The transmural extent of inducible perfusion deficits (<25%, 25% to 50%, 51% to 75%, and >75%) was used to grade segmental perfusion. Quantitative coronary angiography was performed with significant stenosis defined as >50% diameter stenosis. Fifty-three patients (67%) had coronary artery stenoses >50%; sensitivity and specificity for detection by dobutamine and adenosine stress and adenosine perfusion were 89% and 80%, 40% and 96%, and 91% and 62%, respectively. Adenosine IWMAs were seen only in segments with >75% transmural perfusion deficit.
Conclusions— DSMR is superior to adenosine stress for the induction of IWMAs in patients with significant coronary artery disease. Visual assessment of adenosine stress perfusion is sensitive with a low specificity, whereas adenosine stress MR wall motion is highly specific because it identifies only patients with high-grade perfusion deficits. Thus, DSMR is the method of choice for current state-of-the-art treatment regimens to detect ischemia in patients with suspected or known coronary artery disease but no history of prior myocardial infarction.
Key Words: adenosine stress • dobutamine stress • magnetic resonance imaging • perfusion • ischemia
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