Improvement of myocardial perfusion reserve early after coronary intervention: assessment with cardiac magnetic resonance imaging
Nidal Al-Saadi, MD,
Eike Nagel, MD,
Michael Gross, MD,
Bernhard Schnackenburg, PhD,
Ingo Paetsch, MD,
Christoph Klein, MD and
Eckart Fleck, MD
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Figure 1 A selection of magnetic resonance images of the transit of the gadolinium bolus through the right ventricle, the left ventricle and the left ventricular myocardium. Arrows indicate the borders of the visual perfusion defect from a 95% stenosis of the left anterior descending coronary artery in the corresponding territory.
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Figure 2 The left ventricular myocardium was divided into six equiangular segments. The segments as shown were assigned to coronary arteries by the use of invasive angiography. The resultant signal intensity versus time curves of the myocardial segments and of the left ventricular cavity was plotted. LAD = left anterior descending coronary artery; LCX = left circumflex coronary artery; LV = left ventricular cavity; RCA = right coronary artery; RV = right ventricle; s = seconds; SI = signal intensity (arbitrary units).
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Figure 3 Myocardial perfusion reserve index in the control segments (segments contralateral to ischemic segments in patients with single coronary artery disease) when compared with MPRI in segments supplied by stenotic coronary arteries before and after intervention. All values are presented as single values and mean ± one standard deviation. MPRI = myocardial perfusion reserve index; PTCA = percutaneous transluminal coronary angioplasty.
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Figure 4 Improvement of MPRI after intervention in patients treated with stents compared with balloon PTCA. Values are presented as single values, mean ± one standard deviation and percentage increment of MPRI. MPRI = myocardial perfusion reserve index.
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