Transcatheter aortic valve replacement: sedation, rapid pacing and complications
Stem
An 86-year-old woman, 58 kg, with severe calcific aortic stenosis (valve area 0.6 cm², mean gradient 47 mmHg), ejection fraction 55%, stage 3 chronic kidney disease and exertional syncope is scheduled for transfemoral TAVR with a balloon-expandable valve in the hybrid room. She lies flat comfortably and has no reflux symptoms. The cardiologist plans percutaneous access.
Question
How will you anesthetize her, and what are you prepared for?
Ideal answer
HeadlineLocal anesthesia with light sedation, keeping her breathing and talking, with an arterial line and a room ready for general anesthesia, ECMO or sternotomy.
- Arterial line, pads on, large IV, blood available, because vascular injury, rupture or tamponade can need bypass within minutes.1
- Light sedation with local at the groin, because outcomes match general anesthesia and she needs fewer vasopressors.2
- Aortic stenosis goals: sinus rhythm, rate 60–80, afterload maintained, with phenylephrine or norepinephrine ready, because hypotension starts an ischemic spiral.1
- Rapid ventricular pacing during deployment, about 180 per minute with breathing paused, so the valve does not migrate.1
- Watch the pressure recover after pacing, then confirm valve position, leak and coronary flow on imaging.1
Watch for: pressure that does not recover, ST change, a new effusion or complete heart block after deployment.
Breaking down the answer
- Sedation versus general anesthesia — SOLVE-TAVI randomized 447 transfemoral patients: the 30-day composite was 27.2% with sedation and 26.4% with general anesthesia, equivalent; vasopressors were needed in 62.8% versus 97.3%.2
- Who gets general anesthesia — poor ventricles needing mechanical support, severe obstructive apnea, aspiration risk, non-transfemoral access, or when TEE is needed.1 Changes if: she cannot lie flat or still, then I convert early and electively.
- Sedation agents — propofol, remifentanil, dexmedetomidine, ketamine or remimazolam, individualized; dexmedetomidine causes bradycardia.3 An awake patient is my neurologic monitor for stroke.
- Heparin and access — heparin is required for the arterial sheaths;1 two arterial sites and a venous pacing wire are usual, and I can piggyback on the cardiologist's sheaths.
- Valve type — self-expanding valves carry more heart block and paravalvular leak; permanent pacemaker rates 23.4–39% versus 4.9–6% for the balloon-expandable valve.1
- How often things go badly — about 1.3% need open surgery for migration, annular rupture, dissection or tamponade; stroke runs about 3.3%.3
Follow-up question
Seconds after deployment and the end of pacing, her pressure stays at 62/38, ST elevation appears in the anterior and lateral leads, and the ventricle looks globally hypokinetic. What is happening, and what do you do?
Follow-up answer
HeadlineCoronary ostial obstruction by the valve, most often the left main, until proven otherwise; I tell the cardiologist and call the surgical and ECMO teams.
A vasopressor to drive coronary perfusion through collaterals without overloading a failing ventricle, and a low-normal heart rate to cut oxygen demand.1 I secure the airway, converting to general anesthesia while support continues. The cardiologist attempts coronary angiography and stenting or valve retrieval; if perfusion does not return, VA-ECMO or bypass.1 Echo excludes tamponade from annular rupture.
Pitfalls that cost points
- Deep sedation that obstructs the airway in an elderly patient lying flat; I want light, titrated sedation.
- Treating post-deployment hypertension aggressively; a rise in pressure after deployment is common.1
- Discharging monitoring early; conduction disturbances can appear up to 72 hours later.1
Rapid-fire
Q: Risk factors for coronary obstruction? A: Female sex, valve-in-valve, low-lying coronary ostia, shallow sinuses, long leaflets and large valves.1
Q: Mortality of tamponade during TAVR? A: About 23.5% in one study; pericardiocentesis often buys time but surgical repair is usually needed.1
Q: Complete heart block after deployment? A: Pace through the femoral wire, then place a temporary jugular lead and confirm capture before the femoral one is removed.1
Q: Alternative access routes? A: Transaxillary or subclavian, transcarotid, transaortic, transapical or transcaval; non-transfemoral routes are done under general anesthesia.1
Q: Why preserve sinus rhythm? A: The stiff, hypertrophied ventricle depends on atrial contraction; atrial fibrillation is poorly tolerated.1
Numbers to know
| Item | Value |
|---|---|
| Rapid pacing rate | About 180/min1 |
| Heart rate goal in AS | 60–80/min1 |
| SOLVE-TAVI composite, sedation vs GA | 27.2% vs 26.4%2 |
| Vasopressor need, sedation vs GA | 62.8% vs 97.3%2 |
| Pacemaker: self-expanding vs balloon | 23.4–39% vs 4.9–6%1 |
| Conversion to open surgery / stroke | About 1.3% / 3.3%3 |
Links
- Aortic stenosis, Cardiac tamponade, including post-cardiac surgery, Temporary mechanical circulatory support: IABP, Impella and ECMO, Pacemakers and ICDs in the operating room
- 2020 ACC/AHA valvular heart disease guideline; SOLVE-TAVI (2020)
Sources
- 1.Transcatheter Aortic Valve Replacement · OpenAnesthesia (IARS), 2024 · openanesthesia.org
- 2.General versus local anesthesia with conscious sedation in transcatheter aortic valve implantation: the randomized SOLVE-TAVI trial · Circulation (abstract), 2020 · europepmc.org
- 3.A narrative review on current status of conscious sedation for transcatheter aortic valve implantation · Medicina (Kaunas) (PMC12654716), 2025 · pmc.ncbi.nlm.nih.gov
Facts on this page were checked against these sources on Nov 2, 2026. Guidelines change; confirm doses against current institutional protocols.