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Frequency and pattern of de-novo three-vessel and left main coronary artery disease; insights from single center enrolment in the SYNTAX study

^a Department of Cardiac Surgery, Heart Center Leipzig, Struempellstr. 39, 04289 Leipzig, Germany
^b Department of Cardiology, Heart Center Leipzig, Germany
^c Department of Cardiothoracic Surgery, Erasmus Medical Center, Rotterdam, The Netherlands
^d Department of Interventional Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands

Received 8 November 2007; received in revised form 6 April 2008; accepted 23 April 2008.

^_* Corresponding author. Tel.: +49 341 865 1319; fax: +49 341 865 1452. (Email: rastan{at}rz.uni-leipzig.de).

Objectives: To characterize the current patient population regarding extent and pattern of coronary artery disease (CAD) in a routine cardiac catheterization practice with special focus on de-novo three-vessel coronary artery and/or left main disease (3-VD/LM) during enrolment in the SYNTAX study (synergy between PCI with Taxus drug-eluting stent and cardiac surgery) comparing percutaneous coronary intervention (PCI) with drug-eluting stents (DES) and coronary artery bypass grafting (CABG) in 3-VD/LM. Methods: During a 4-month study enrolment period, a total of 3319 consecutive adult patients undergoing coronary angiography were prospectively recorded. Patients with de-novo 3-VD/LM were screened in the daily heart team conference by interventional cardiologists and cardiac surgeons concerning suitability for study enrolment. Complexity of CAD was quantified by the SYNTAX score. Results: A total of 694 patients (20.9%) presented with 3-VD/LM, of which 271 had previous CABG and 232 previous PCI treatment. Of the 191 patients with de-novo 3-VD/LM, SYNTAX study exclusion criteria were present in 87 patients consisting mostly of acute myocardial infarction (n = 47) or concomitant indications for additional heart surgery (n = 35). A total of 104 patients (54.4% of all screened) were potentially suitable for study enrolment. Of these, 13 patients refused study participation, 10 presented with uncertain protocol adherence and 6 were already participating in other cardiovascular trials. A total of 67 patients were therefore enrolled in the SYNTAX study, representing 9.7% of 3-VD/LM and 35.1% of all screened patients. Twenty-four patients were not amenable for PCI and were therefore assigned to the CABG registry. Compared to the randomized cohort, these patients had more complex CAD (SYNTAX score 34 vs 26, p = 0.003) with significantly more chronic coronary vessel occlusion (70.8% vs 22.5%, p = 0.04). In the randomized cohort, CABG and PCI patients were comparable in age (PCI 69.7 years vs CABG 67.2 years), additive EuroSCORE (4.8 vs 4.4), EF (57.8% vs 52.4%), number of coronary lesions (4.5 vs 4.6), left main disease (42.9% vs 52.6%) and coronary vessel occlusion. Conclusions: Patients with de-novo 3-VD/LM represented a small proportion of patients undergoing coronary angiography at our center. However, SYNTAX study inclusion and randomization rates of these screened patients were high. Chronic vessel occlusion and high SYNTAX scores were more common in CABG registry patients compared to randomized patients.

Key Words: Coronary artery disease • CABG • PCI • Multivessel disease • Left main stem stenosis • SYNTAX study

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