The TAVR Revolution — and Its Limits
Transcatheter aortic valve replacement (TAVR) has fundamentally changed the treatment of aortic stenosis. What began as a therapy for patients too sick for surgery has expanded to include intermediate and even low-risk patients. But the question of which patients benefit most from TAVR vs. surgical aortic valve replacement (SAVR) remains nuanced.
Current Guidelines: Risk-Stratified Decision Making
The 2020 ACC/AHA Valvular Heart Disease Guidelines recommend:
- Low surgical risk (STS < 3%), age < 65 — SAVR preferred (longer durability data, better hemodynamics)
- Low surgical risk, age 65-80 — Either TAVR or SAVR; shared decision-making
- Intermediate risk (STS 3-8%) — Either TAVR or SAVR; Heart Team discussion
- High risk (STS > 8%) — TAVR preferred
- Prohibitive risk — TAVR only option
What the Numbers Don't Tell You
Risk scores provide a starting framework, but several factors influence the TAVR vs. SAVR decision beyond STS-PROM:
Anatomy
Bicuspid aortic valves, small annuli, horizontal aortas, and challenging vascular access can make TAVR technically difficult or impossible. Conversely, porcelain aorta or hostile chest (prior radiation, multiple sternotomies) may preclude SAVR.
Durability
SAVR valves (both mechanical and bioprosthetic) have 20+ years of durability data. TAVR valves have robust 5-year data and growing 10-year data, but lifetime management strategy matters more for younger patients. A 55-year-old will likely need a valve redo; the question is whether that redo is better planned as a surgical re-replacement or a valve-in-valve TAVR.
Concomitant Disease
If you need CABG, mitral repair, or aortic root surgery in addition to aortic valve replacement, SAVR allows these to be addressed in a single operation. TAVR treats the valve alone.
The Heart Team Imperative
The TAVR vs. SAVR decision is the textbook case for Heart Team review. It requires input from both an interventional cardiologist (who performs TAVR) and a cardiac surgeon (who performs SAVR) — ideally with neither having a financial incentive to recommend their own procedure.
This is exactly why independent second opinions matter. When both the surgeon and the cardiologist work for the same hospital, institutional incentives can subtly influence which option gets presented first.
Read our complete aortic stenosis guide or start your review.