Is Off-Pump Coronary Artery Bypass Surgery Superior to On-Pump Coronary Artery Bypass Surgery on Postoperative Paradoxical Ventricular Septal Motion?
Bibliographic record
Abstract
<p><strong>Background</strong>: The aims of this study were to investigate the appearance of paradoxical ventricular septal motion (PSM) after coronary artery bypass graft (CABG) surgery and to identify factors that might be related to this abnormality.</p><p><strong>Methods</strong>: This prospective study included 119 consecutive patients (38 women, 81 men) who underwent CABG. Patients who underwent on-pump surgery (22 women, 45 men) and patients who underwent off-pump surgery (16 women, 36 men) were studied separately. All subjects underwent preoperative angiographic septal perfusion evaluation, pre- and postoperative echocardiography, and standard electrocardiographic and laboratory investigations, including troponin I and CK-MB levels. Multivariate logistic regression analysis was also performed for a variety of related parameters.</p><p><strong>Results</strong>: Significant differences in EuroSCORE, length of intensive care unit stay, length of hospital stay, PSM (assessed using echocardiography), septal perfusion (observed using preoperative angiography), postoperative pleural effusion, and intensive care unit recidivism were observed between the two groups (<em>P</em> &lt; .05). Moreover, postoperative PSM was correlated with septal perfusion (<em>r</em> = -0.687<sup>**</sup>, <em>P</em> &lt; .001), type of operation (<em>r</em> = -0.194<sup>*</sup>, <em>P</em> = .035), diabetes mellitus (<em>r</em> = 0.273<sup>**</sup>, <em>P</em> = .003), carotid stenosis (<em>r</em> = 0.235<sup>*</sup>, <em>P</em> = .011), the number of distal anastomoses (<em>r</em> = 0.245<sup>**</sup>, <em>P</em> = .008), pleural effusion (<em>r</em> = 0.193<sup>*</sup>, <em>P</em> = .037), and intensive care unit recidivism (<em>r</em> = 0.249<sup>**</sup>, <em>P</em> = .007). However, multivariate analysis demonstrated that only preoperative septal perfusion (odds ratio: 0.037; 95% confidence interval: 0.011-0.128; <em>P</em> &lt; .05) constitutes an independent risk factor for PSM (<em>P</em> &lt; .05).</p><p><strong>Conclusions</strong>: This study demonstrated that preoperative septal perfusion deficiency represents an independent risk factor for postoperative PSM in patients undergoing CABG. Further investigations addressing the timing of the appearance of PSM and the correlation of this finding with perfusion imaging studies may provide new details concerning the mechanisms that underlie this abnormality.</p>
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 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 source (direct Gemma or distilled Codex), 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".