CLINICAL RESEARCH: CARDIAC IMAGING
Noninvasive Evaluation With Multislice Computed Tomography in Suspected Acute Coronary SyndromePlaque Morphology on Multislice Computed Tomography Versus Coronary Calcium Score
Maureen M. Henneman, MD*,
Joanne D. Schuijf, PhD*, ,
Gabija Pundziute, MD*,
Jacob M. van Werkhoven, MSc*,
Ernst E. van der Wall, MD, PhD*,,
J. Wouter Jukema, MD, PhD*, and
Jeroen J. Bax, MD, PhD*,*
* Department of Cardiology, Leiden University Medical Center, Leiden, the Netherlands
The Interuniversity Cardiology Institute of the Netherlands, Utrecht, the Netherlands.
Manuscript received July 18, 2007;
revised manuscript received April 7, 2008,
accepted April 15, 2008.
* Reprint requests and correspondence: Dr. Jeroen J. Bax, Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. (Email: j.j.bax{at}lumc.nl).
Objectives: Our aim was to evaluate the atherosclerotic plaque burden and morphology as determined by 64-slice multislice computed tomography (MSCT) coronary angiography in relation to the calcium score in patients presenting with suspected acute coronary syndrome (ACS).
Background: The absence of coronary calcium during coronary calcium scoring has been proposed to rule out significant coronary artery disease (CAD). However, data in patients presenting with suspected ACS are scarce.
Methods: In 40 patients (age 57 ± 11 years, 26 men) presenting with suspected ACS, MSCT coronary angiography in combination with coronary calcium scoring was performed before conventional coronary angiography. MSCT angiograms were evaluated for the presence or absence of coronary atherosclerotic plaque and the presence or absence of obstructive ( 50% luminal narrowing) CAD. In addition, plaque type was determined, and findings were related to the calcium score.
Results: Coronary artery disease was observed in 38 patients, of whom 10 patients had nonobstructive and 28 patients had obstructive CAD, confirmed by conventional coronary angiography in all patients. In patients with CAD, plaques were distributed as follows: 39% noncalcified plaques, 47% mixed plaques, and 14% calcified plaques. Coronary calcium was detected in 27 patients, of whom 10 had a score >400. In 13 (33%) patients, no coronary calcium was observed, but in 11 (85%), atherosclerotic plaques were detected on MSCT angiography.
Conclusions: In patients presenting with suspected ACS, noncalcified plaques are highly prevalent and the absence of coronary calcium does not reliably exclude the presence of (significant) atherosclerosis. This information may be of value to improve our understanding of the potential role of MSCT in this patient population.
Key Words: MSCT • atherosclerosis • acute coronary syndrome
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Abbreviations and Acronyms
| | ACS = acute coronary syndrome | | CABG = coronary artery bypass graft surgery | | CAD = coronary artery disease | | CS = calcium score | | MSCT = multislice computed tomography | | PCI = percutaneous coronary intervention |
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