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Reliable noninvasive coronary angiography with fast submillimeter multislice spiral computed tomography

Reliable noninvasive coronary angiography with fast submillimeter multislice spiral computed tomography

Circulation 106(16): 2051-2054

Background-Multislice spiral computed tomography (MSCT) is a promising technique for noninvasive coronary angiography, although clinical application has remained limited because of frequently incomplete interpretability, caused by motion artifacts and calcifications. Methods and Results-In 59 patients (53 male, aged 58+-12 years) with suspected obstructive coronary artery disease, ECG-gated MSCT angiography was performed with a 16-slice MSCT scanner (0.42-s rotation time, 12X0.75-mm detector collimation). Thirty-four patients were given additional beta-blockers (average heart rate: 56+-6 min-1). After contrast injection, all data were acquired during an approximately 20-s breath hold. The left main (LM), left anterior descending (LAD), left circumflex (LCX), and right coronary artery (RCA), including gtoreq2.0-mm side branches, were independently evaluated by two blinded observers and screened for gtoreq50% stenoses. The consensus reading was compared with quantitative coronary angiography. MSCT was successful in 58 patients. Eighty-six of the 231 evaluated branches were significantly diseased. Without exclusion of branches, the sensitivity, specificity and positive and negative predictive value to identify gtoreq50% obstructed branches was 95% (82/86), 86% (125/145), 80% (82/102), and 97% (125/129), respectively. The overall accuracy for the LM, LAD, RCA, and LCX was 100%, 91%, 86%, and 81%, respectively. No obstructed LM, LAD, or RCA branches remained undetected. Classification of patients as having no, single, or multivessel disease was accurate in 78% (45/58) of patients and no patients with significant obstructions were incorrectly excluded. Conclusions-Improvements in MSCT technology, combined with heart rate control, allow reliable noninvasive detection of obstructive coronary artery disease.

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Accession: 011280201

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PMID: 12379572

DOI: 10.1161/01.cir.0000037222.58317.3d

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