Surgical Bailout in Patients Undergoing Transfemoral Transcatheter Aortic Valve Replacement
Bibliographic record
Abstract
BACKGROUND: Transcatheter aortic valve replacement (TAVR) harbors the risk of periprocedural complications that require emergent cardiac surgery, or "surgical bailout." Surgical bailout intends to be lifesaving but is associated with high mortality. This has given rise to discussion on the necessity of surgical backup during TAVR. Therefore, recent studies in contemporary TAVR patients are warranted. OBJECTIVES: This study aimed to assess the incidence, trends, and clinical outcomes of surgical bailout in patients undergoing transfemoral TAVR. METHODS: The CENTER2 (Cerebrovascular Events in Patients Undergoing Transcatheter Aortic Valve Implantation With Balloon-Expandable Valves Versus Self-Expandable Valves 2) study contains patient-level data from 10 clinical studies with patients undergoing TAVR between 2007 and 2022. RESULTS: < 0.001). Surgical bailout was more frequently observed in women compared with men (0.61% vs 0.41%; P = 0.03). Ventricular perforation was the most prevalent reason for surgical bailout (28.0%). Patients who underwent surgical bailout reported higher mortality rates during the 1-year follow-up compared with patients without surgical bailout (68.3% vs 15.3%; HR: 8.60; 95% CI: 6.74-10.97; P < 0.001). Interestingly, patients surviving the first 90 days reported a similar mortality risk (HR: 2.19; 95% CI: 0.91-5.27; P = 0.08). CONCLUSIONS: The incidence of surgical bailout is very low in the contemporary TAVR population. Mortality rates remain high among patients requiring surgical bailout during transfemoral TAVR, but this risk diminishes in patients surviving the postprocedural period. (Cerebrovascular Events in Patients Undergoing Transcatheter Aortic Valve Implantation With Balloon-Expandable Valves Versus Self-Expandable Valves 2 [CENTER2]; NCT03588247).
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.026 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".