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Haemodynamic and neurohormonal effects of AT1-receptor blockers

2004· article· en· W2102047274 on OpenAlexaff
Robert S. McKelvie

Bibliographic record

VenueEuropean Heart Journal Supplements · 2004
Typearticle
Languageen
FieldMedicine
TopicHeart Failure Treatment and Management
Canadian institutionsMcMaster UniversityHamilton Health Sciences
Fundersnot available
KeywordsCandesartanMedicineEnalaprilHeart failureAngiotensin II receptor type 1ValsartanEjection fractionInternal medicineCardiologyACE inhibitorAngiotensin IIAngiotensin receptorCardiac function curveMetoprololPharmacologyAngiotensin-converting enzymeReceptorBlood pressure

Abstract

fetched live from OpenAlex

AT1-receptor blockers offer potential advantages in the management of heart failure, since they selectively block AT1-receptor activation, independent of the source of angiotensin II, while preserving the potentially beneficial effects of AT2-receptor activation. In placebo-controlled trials, these agents have been shown to have beneficial effects on haemodynamics and clinical status. Comparative studies, including the RESOLVD Pilot Study with candesartan, have shown that AT1-receptor blockers and angiotensin-converting-enzyme (ACE) inhibitors produce comparable changes in haemodynamics, neurohormones, cardiac function, and heart-failure symptoms. The RESOLVD Pilot Study also showed that the combination of candesartan and enalapril produced a significantly greater improvement in left-ventricular ejection fraction (LVEF) than either agent alone, consistent with the finding in the CHARM-Added study that the combination of candesartan and an ACE inhibitor significantly reduced cardiovascular mortality and morbidity, compared with ACE inhibition alone. Moreover, in the RESOLVD Pilot Study, triple combination therapy with candesartan, enalapril and metoprolol controlled release resulted in significantly improved LVEF and reductions in cardiac volumes, suggesting a favourable effect on cardiac function and remodelling, compared with dual neurohormonal blockade. By contrast, no such improvements in cardiac function were seen with valsartan in patients who were also receiving an ACE inhibitor and a β-blocker in the Val-HeFT echocardiographic substudy. In conclusion, mechanistic studies suggest that AT1-receptor blockers have a valuable role in the management of heart failure.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.243
Threshold uncertainty score0.591

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.014
GPT teacher head0.273
Teacher spread0.259 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

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".

Quick stats

Citations0
Published2004
Admission routes1
Has abstractyes

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