Bifurkasyon Stentlemede Güncel Kanıtlar
Özet
Koroner bifurkasyon lezyonlarının tedavisinde provizyonel stentleme ile çift stent stratejilerini (Culotte, Crush, DK Crush, T/TAP) karşılaştıran güncel klinik kanıtlar, lezyon kompleksliğine göre strateji seçiminin önemini göstermektedir. CACTUS, BBC 1 ve EBC TWO gibi önemli çalışmalar, kompleks olmayan lezyonlarda provizyonel yaklaşımın iki stent tekniğine kıyasla benzer veya daha düşük major kardiyovasküler olay (MACE) oranları sağladığını ortaya koymuştur. Buna karşın, DEFINITION II çalışması kompleks bifurkasyon lezyonlarında planlı çift stent stratejisinin hedef lezyon başarısızlığını (TLF) anlamlı derecede azalttığını kanıtlamıştır. Özellikle DK crush tekniği, hem genel bifurkasyonlarda hem de sol ana koroner arter (LMCA) distal gerçek lezyonlarında provizyonel stentleme ve Culotte yöntemlerine göre daha düşük TLR ve MACE oranları ile belirgin bir üstünlük sergilemiştir. Tanı ve tedavi sürecinde, FFR kılavuzluğunun yan dal girişim ihtiyacını azalttığı, IVUS ve OCT gibi intravasküler görüntüleme yöntemlerinin ise stent malapozisyonunu engelleyerek uzun dönem mortalite ve stent trombozu riskini düşürdüğü gösterilmiştir. Son olarak, çift stent uygulamalarında optimal lümen açıklığı sağlamak amacıyla final kissing balon dilatasyonu (FKB) ve proksimal optimizasyon tekniğinin (POT) rutin kullanımı kesin olarak önerilmektedir.
Current clinical evidence comparing provisional stenting with systematic two-stent strategies (Culotte, Crush, DK Crush, T/TAP) for coronary bifurcation lesions highlights the critical impact of lesion complexity on procedural outcomes. Major clinical trials including CACTUS, BBC 1, and EBC TWO indicate that provisional stenting remains the optimal first-line approach for non-complex bifurcations, demonstrating similar or lower major adverse cardiovascular events (MACE) rates. Conversely, the DEFINITION II trial proves that a planned two-stent strategy significantly reduces target lesion failure (TLF) in complex bifurcation anatomies. Notably, the DK Crush technique shows substantial superiority, providing lower MACE and target lesion revascularization (TLR) rates in both general and distal left main coronary artery (LMCA) true bifurcation lesions compared to provisional and Culotte techniques. Furthermore, physiological assessment via FFR reduces unnecessary side-branch interventions, while intravascular imaging modalities like IVUS and OCT significantly decrease long-term mortality, TLR, and stent thrombosis by optimizing stent expansion and apposition. Finally, routine application of final kissing balloon (FKB) dilatation and the proximal optimization technique (POT) is strictly required in two-stent strategies to maximize lumen patency and procedural success.
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