Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 274

The DOI matches its Crossref record.

Inhibition of Hypoxic Pulmonary Vasoconstriction by Nifedipine

Simonneau, Gérald, Escourrou, Pierre, Duroux, Pierre, Lockhart, Alain·1981·New England Journal of Medicine

Abstract

SEVERE pulmonary hypertension mainly due to hypoxic vasoconstriction may develop in patients with chronic airflow obstruction and acute respiratory failure.1 Experiments in isolated rat lungs have implied that the calcium antagonist verapamil inhibits hypoxic pulmonary vasoconstriction.2 A preliminary report on patients with hypoxia suggests that verapamil causes an immediate drop in pulmonary vascular resistance.3 However, the concomitant fall in cardiac output may be hazardous in these severely hypoxic subjects. Nifedipine, a new calcium antagonist, causes few side effects4 and is a powerful vasodilating agent of systemic vessels5; as a result it usually increases cardiac output in both normal subjects . . .

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1056/nejm198106253042606

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 274

Metadata

Authors
Simonneau, G., Escourrou, P., Duroux, P., & Lockhart, A.
Venue
New England Journal of Medicine
Published
1981-06-25
Volume
304
Issue
26
Pages
1582-1585
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2061098585
Cited by
274
References
0
FWCI
27.22
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Inhibition of Hypoxic Pulmonary Vasoconstriction by Nifedipine. https://app.cochat.ai/papers/10.1056/nejm198106253042606
The paper
Simonneau, G., Escourrou, P., Duroux, P., & Lockhart, A. (1981). Inhibition of Hypoxic Pulmonary Vasoconstriction by Nifedipine. New England Journal of Medicine. https://doi.org/10.1056/nejm198106253042606

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.