Cracking the Code of Coronary Calcium: One-year Clinical Outcomes of Intravascular Lithotripsy in All-comers and Two Complex Cohorts
Bibliographic record
Abstract
Background: Severe coronary calcifications are commonly encountered in real-world populations and in left main (LM) disease, heightening complication risks including stent underexpansion. Although intravascular lithotripsy (IVL) appears safe, longer-term data in high-risk populations are lacking. The aim of this study was therefore to examine 1-year IVL outcomes for severely calcified lesions in two complex cohorts: LM stenosis and underexpanded stents (UES) during stent implantation. Methods: A registry study was carried out to examine major adverse cardiovascular events (MACEs) (MI, target vessel revascularisation [TVR], cardiac mortality). The LM and UES subgroups were compared with their counterparts in the non-LM and de novo lesion subgroups, respectively. Results: The study involved 102 participants (median age, 70 years, 68% male), and the cardiovascular burden was high (diabetes, 72%; dialysis, 18%; prior MI, 43%, median left ventricular ejection fraction, 45%). Many participants presented acutely (acute coronary syndrome, 36%; decompensated heart failure, 13%) and had complex anatomies (triple-vessel disease, 77%). The cardiovascular burden was higher in the LM and UES subgroups than in the non-LM and de novo lesion subgroups, but the rates of procedural complications and 30-day MACEs were low and were not significantly different. The 1-year MACE rate was higher in the LM group than in non-LM (29% versus 10%, p=0.042), but was non-significant after adjusting for baseline variables (OR 3.08; 95% CI [0.87–10.9]); the rates of 1-year MI, TVR and mortality did not differ from non-LM. In the UES group, 1-year MACE rate (17% versus 13%, p=0.500) was similar to that for de novo lesions. Conclusion: The preliminary data suggest that the use of IVL is reasonable when encountering stent underexpansion due to severe coronary calcifications during stent implantation. The 1-year MACE rate was higher in calcific LM stenosis, probably due to greater comorbidity burden and acute presentations.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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".