Assessment and management of coronary artery disease in patients undergoing transcatheter aortic valve replacement.

PURPOSE OF REVIEW

Coronary artery disease (CAD) is commonly observed in patients undergoing transcatheter aortic valve replacement (TAVR). Significant variability exists across institutions for strategies used for CAD diagnosis and its management. The heart team often relies upon traditional practice patterns and the decision for revascularization by percutaneous coronary intervention (PCI) is influenced by patient, angiographic, operator, and system-related factors.

RECENT FINDINGS

Contemporary coronary tomography angiography (CTA) shows significant promise for detection of clinically important CAD and preliminary data support CTA use for TAVR patients. The prognostic implications of CAD in a TAVR population remain unclear with studies showing conflicting data for the benefits of PCI. Recent trials show that medical management is an effective initial treatment strategy for stable CAD, a finding likely also applicable for asymptomatic and stable TAVR patients. In addition, PCI performed pre-TAVR, concomitant with TAVR or after TAVR has been shown to produce similar outcomes. Dual antiplatelet therapy (DAPT) is mandated after PCI but associated with increased risk of bleeding in TAVR population with accumulating evidence for single antiplatelet therapy (SAPT) post-TAVR unless DAPT or anticoagulation is indicated for another reason.

SUMMARY

Although coronary angiography remains the predominant modality for CAD assessment, CTA is increasingly being used in TAVR patients. There is limited evidence to guide CAD management in TAVR patients with significant variability in practice patterns. Medical therapy is recommended for asymptomatic and stable CAD patients with applicability for TAVR population. Despite prior concerns, recent studies suggest successful coronary access post-TAVR and similar outcomes for PCI offered pre-TAVR, concomitant with TAVR and post-TAVR settings. Safety of DAPT should be an important consideration for PCI in TAVR patients. Ongoing studies will determine the preferred testing for CAD diagnosis, benefit of revascularization, timing of PCI, and optimum antithrombotic therapy for TAVR populations.