الفهرس 
Anatomy of Coronary ArteriesOnly 14 pages are availabe for public view
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Abstract
The complexity of coronary artery disease (CAD) is one of the main factors influencing the selection of treatment modality including surgical or Catheter-based inpatients with CAD, in addition to the extent of myocardial ischemia, patient and clinician preference, and other patient comorbidities (1). As myocardial revascularization improves survival rate in patients with multi-vessel Coronary artery disease, so the good assessment of the complexity of the CAD is critical issue (2). The SYNTAX score is a comprehensive angiographic scoring system commonly used to assess the complexity of CAD by invasive coronary angiography (ICA). The SYNTAX score was developed in the context of the SYNTAX Trial (Synergy between PCI with Taxus and. Cardiac Surgery) ,it combines several validated angiographic classifications of CAD complexity based on the location and morphology of obstructive coronary lesions, and allows for robust risk Stratification as well as guides appropriate methods of coronary revascularization (3). The SYNTAX score aiming to help the Heart Team to objectively characterize the severity and extension of CAD in patients with multi-vessel disease, aiding in the decision-making process between (PCI) and CABG (4). The SYNTAX score is an important tool to grade angiographic complexity and to risk-stratify patients being considered for revascularization based on ICA (5, 6). The invasive coronary angiography SYNTAX score can guide the optimal revascularization strategy among patients with complex CAD (LM disease or 3-vessel disease), CABG remains as the standard of care for patients with high (≥33) or intermediate (23–32) SYNTAX scores, whereas PCI is an acceptable alternative in patients with less complex disease (SYNTAX score ≤ 22).