The effectiveness of the method of external counterpulsation in patients with chronic stable angina
Bibliographic record
Abstract
Aim. To assess the effectiveness of the complex treatment of patients with stable angina pectoris using the method of external counterpulsation (ECP).
 Methods. 92 patients with chronic stable angina were included in the comparative analysis, which divided into 2 groups: 57 patients received one course of treatment using the ECP method (main group), 35 patients received only drug treatment (control group). Before and after the therapy, a general clinical examination (including determining the functional class of angina pectoris and the need to use nitroglycerin preparations), coronary angiography, echocardiography, exercise stress test (stress ECG), and quality assessment using the Seattle Angina Questionnaire (SAQ) was performed.
 Results. The decrease in the average functional class of angina was more significant in the main group compare to the control group from 2.280.73 to 0.930.80 (p 0.05) versus from 2.340.73 to 1.830.71 (p 0.05). A decrease of at least 1 functional class more often occurred in the main group 78.9% of patients versus 57.1% (p=0.0258). The use of nitroglycerin sharply decreased after treatment in the group, that use the ECP method (by 51.6%; p=0.002), whereas in the control group, despite a slight decrease (by 22.7%), the changes did not reach statistical significance (p=0.0736). Both groups showed similar dynamics of changes in echocardiography. The differences were obtained only for the dynamics of the ejection fraction of the left ventricle (LVEF), which was greater in the main group an increase of 4.695.56% versus 1.755.15% (p=0.0448). The dynamics of all indicators of exercise stress test significantly differ between groups, and if for the main group it is positive, in the control group it is negative. Some indicators of quality of life change insignificant and similar for both groups (for example, on the scale for limiting physical exertion), and on some scales (stability scales for attacks and the frequency of angina attacks), the improvement in the main group is much more significant in comparing with the control group: 3037 points versus 1213 points, respectively (p 0.0001). The overall quality of life assessment score improved more in the group, that use the ECP method: +96.1040.73 versus +45.3135.06 the control group (p 0.0001).
 Conclusion. The method of external counterpulsation (ECP) can be used in clinical practice as part of a comprehensive treatment of patients with stable angina pectoris; it can significantly reduce the class of angina pectoris and the need to use nitroglycerin preparations, improve a number of indicators of echocardiography, electrocardiography with exercise and quality of life indicators.
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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) | 0.000 | 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".