Noninvasive Diagnostic Modalities in an Isolated Case of Cardiac Amyloidosis
Bibliographic record
Abstract
Amyloidoses are a family of inherited or acquired disorders characterized by the deposition of insoluble extracellular protein fibrils in various organs and tissues, thereby impairing their function. Amyloidoses are typically misfolded proteins, and on rare occasions, can deposit in the myocardium resulting in an infiltrative/restrictive cardiomyopathy. Restrictive cardiomyopathy is an underdiagnosed cause of congestive heart failure (CHF) with preserved ejection fraction, atrial and ventricular arrhythmias along with conduction defects. In elderly patients, as with this study, cardiac amyloidosis most often results from abnormalities in the liver protein transthyretin (TTR), a thyroxine and retinol-retinol binding complex transporter in blood. Mutated serum TTR results in familial systemic amyloidosis, whereas wild-type TTR results in senile cardiac amyloidosis predominantly seen in elderly males. Scintigraphy, a common non-invasive method used to facilitate early diagnosis of cardiac amyloidosis was the method used in this study. However, the gold standard for definitive diagnosis of cardiac amyloidosis is endomyocardial biopsy (EMB). Besides organ transplant, which is rarely done, therapy for cardiac amyloidosis is mainly aimed at symptomatic and supportive care. Plenty of evidence has shown that the left ventricular ejection fraction (LVEF) in patients with restrictive cardiomyopathy is usually preserved. However, in this study, we review the unique case of an 82-year-old male who was diagnosed with isolated cardiac amyloidosis with severe systolic dysfunction (decreasedLVEF), the methods used to establish the diagnosis, as well as the therapeutic interventions.
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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) | 0.000 | 0.000 |
| 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".