SYNTAX Score Overview
The SYNTAX score is an angiographic grading tool used to quantify the anatomical complexity of coronary artery disease. It is a cornerstone of decision-making for multidisciplinary 'Heart Teams' when determining the best revascularization strategy for patients with multivessel disease or left main coronary disease.
CABG vs. PCI
The primary utility of the SYNTAX score is helping cardiologists and cardiac surgeons choose between Percutaneous Coronary Intervention (PCI/stents) and Coronary Artery Bypass Grafting (CABG):
- PCI is less invasive but may have higher rates of repeat revascularization in highly complex disease.
- CABG is open-heart surgery but often provides superior long-term survival and freedom from repeat procedures when coronary anatomy is highly complex.
Scoring Interpretation
The score is calculated based on the number of lesions, their location, and specific adverse morphological features (like total occlusions, bifurcations, calcification, or tortuosity).
- Low Score (0-22): PCI and CABG offer similar long-term clinical outcomes; PCI is often favored due to lower upfront invasiveness.
- Intermediate Score (23-32): CABG is generally preferred, though PCI may be acceptable depending on patient comorbidities and preferences.
- High Score (>=33): Highly complex disease where CABG demonstrates a clear, significant survival and outcome advantage over PCI.
Score = Sum of lesion-specific anatomical complexity points