Aortic Root Replacement in Patients with Previous Heart Surgery
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
OBJECTIVE: The objective was to review the operative risk and outcomes of redo aortic root replacement. PATIENTS AND METHODS: From July 1990 to December 2001, aortic root replacement was performed in 165 patients who had at least one previous cardiac operation. Their mean age was 49 +/- 16 years and 78% were men. Twenty-eight patients had a previous aortic root replacement. The principal indication for surgery was prosthetic aortic valve dysfunction. All the patients had a dilated, calcified, ruptured, or some other abnormality of the aortic root. The follow-up was complete and extended from 0 to 12.5 years, mean of 3.8 years. RESULTS: There were 12 operative (7%) and 20 late deaths (12%). The survival at 8 years was 68%+/- 6%. The principal cause of death was cardiovascular related. Age at increments of 5 years (risk ratio: 1.2; CI: 95%; 1.1 to 1.4) and preoperative New York Heart Association functional class IV (risk ratio: 2.2; CI: 95%: 1.1 to 4.7) were the only two independent predictors of death. Two patients had a stroke and died; two patients developed three episodes of prosthetic valve endocarditis and died. Three patients were reoperated on because of endocarditis in one, bioprosthetic valve failure in one, and dehiscence of a prosthetic mitral valve in one. The freedom from reoperation at 8 years was 93%+/- 5%. CONCLUSIONS: Redo aortic root replacement can be done with low operative mortality in elective patients and the risk increases in those who need emergent surgery and are older. The long-term results are satisfactory and similar to those for patients who have aortic root replacement for the first time.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| 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 it