81-year-old with symptomatic severe AS: why TAVI rises to the top
An 81-year-old woman with symptomatic severe AS, preserved LVEF, and mild frailty. Walking through why TAVI becomes the preferred approach — and what factors are driving it.
Clinical scenario
Symptomatic severe AS in an 81-year-old. Does the reasoning hold together?
TAVI rises to the top not because of age alone — but because age, life expectancy, frailty, and transfemoral access all converge in the same direction.
Clinical scenario
81-year-old woman. Dyspnea on moderate exertion (NYHA class II–III) over the past 4 months. Echo: Vmax 4.3 m/s, mean gradient 44 mmHg, AVA 0.82 cm², LVEF 58%. No significant coronary disease. Mild frailty on clinical assessment (slow gait, reduced grip). STS predicted risk of mortality: 4.1%. Transfemoral CT confirms good femoral access bilaterally.
What makes this straightforward — and what makes it worth thinking through
On the surface, this case seems to answer itself: symptomatic severe AS, age 81, transfemoral TAVI available. But the reasoning matters more than the conclusion. If you cannot articulate why TAVI is favored, you cannot identify the cases where the reasoning breaks down — or the patient who is 81 but has anatomy or life expectancy that shifts the balance.
Working through the indication
Symptomatic severe AS is a Class I indication for AVR per ACC/AHA VHD 2020. The severity criteria are met: Vmax 4.3 m/s, mean gradient 44 mmHg, AVA 0.82 cm² — all three thresholds crossed. Symptoms are valve-attributable. The indication for AVR is not in doubt.
Why TAVI rises to the top
- Age 81 correlates with shorter life expectancy — the durability advantage of a surgical bioprosthesis is less relevant when expected survival is 5–10 years.
- Intermediate STS risk (4.1%) combined with transfemoral access: PARTNER 2 and SURTAVI showed equivalent outcomes for TAVI vs SAVR at intermediate risk.
- Mild frailty: TAVI's lower procedural burden — no sternotomy, no cardiopulmonary bypass — is a meaningful advantage in a frail patient who may have limited recovery reserve.
- Transfemoral access feasible: the access route on which TAVI's risk advantage is established.
- No concomitant cardiac surgery: no reason to open the chest for additional procedures.
What SAVR would require you to argue
SAVR remains a legitimate option here — STS risk of 4% is not prohibitive. But to choose SAVR over TAVI in this patient, you would need to argue: that the patient has life expectancy sufficient to benefit from greater durability; that frailty does not predict worse recovery; or that anatomy makes TAVI technically unsuitable. None of those arguments hold here.
The Heart Team is meeting to discuss this patient. What is the most appropriate recommendation?
- 1.Refer directly for TAVI without formal Heart Team discussion⚠ Not recommended
Heart Team review remains the recommended process even when TAVI is clearly favored — it is not bureaucratic overhead.
- 2.Heart Team review; TAVI is the likely preferred approach given age, frailty, and transfemoral access✓ Recommended
This follows the ACC/AHA VHD 2020 recommendation for Heart Team evaluation — the team confirms what the data suggests.
- 3.Proceed with SAVR if the patient accepts the surgical risk△ Consider
Reasonable if patient strongly prefers open surgery or if anatomy makes transfemoral TAVI unsuitable — but not the default.
Teaching points
- Advanced age is not the reason TAVI is preferred — it is a proxy for shorter life expectancy, higher physiologic stress of open surgery, and frailty. These are the actual drivers.
- Transfemoral access is a prerequisite for TAVI's procedural risk advantage. Confirm CT-feasible access before assuming TAVI is low-risk.
- Frailty assessment changes the recommendation more than STS score alone — frail patients have worse SAVR outcomes regardless of calculated risk.
- SAVR does not disappear as an option simply because the patient is over 80. If anatomy or patient preference argues for it, the discussion remains valid.
- Heart Team review is recommended even when the clinical picture is clear — it ensures that anatomy, imaging, and patient values are all incorporated.
Apply this in practice
Confirm the indication and approach in the AS Intervention Navigator.
Open AS Intervention Navigator