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What's new in pulmonary hypertension clinical research: lessons from the best abstracts at the 2020 American Thoracic Society International Conference.

ABSTRACT: In this conference paper, we review the 2020 American Thoracic Society International Conference session titled, "What's New in Pulmonary Hypertension Clinical Research: Lessons from the Best Abstracts". This virtual mini-symposium took place on 21 October 2020, in lieu of the annual in-person ATS International Conference which was cancelled due to the COVID-19 pandemic. Seven clinical research abstracts were selected for presentation in the session, which encompassed five major themes: (1) standardizing diagnosis and management of pulmonary hypertension, (2) improving risk assessment in pulmonary arterial hypertension, (3) evaluating biomarkers of disease activity, (4) understanding metabolic dysregulation across the spectrum of pulmonary hypertension, and (5) advancing knowledge in chronic thromboembolic pulmonary hypertension. Focusing on these five thematic contexts, we review the current state of knowledge, summarize presented research abstracts, appraise their significance and limitations, and then discuss relevant future directions in pulmonary hypertension clinical research.

SUBMITTER: Sweatt AJ

PROVIDER: S-EPMC8404658 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BACKGROUND: Current resuscitation guidelines recommend 3:1 Compression:Ventilation (C:V) ratio, however the most effective C:V ratio in newborns remains controversial. We recently demonstrate that if chest compressions (CC) are superimposed by sustained inflations (SI) return of spontaneous circulation (ROSC) and mortality are improved in asphyxiated newborn piglets when compared to standard coordinated 3:1 resuscitation. However, this has not been studied in newborns. OBJECTIVES: To determine if CC superimposed with SI impacts ROSC in infants <33 weeks with bradycardia or asystole compared to coordinated 3:1 C:V resuscitation. DESIGN/METHODS: In a pilot study, infants born <33 weeks gestational age with an heart rate <60/min or asystole were randomized to receive either “3:1 C:V” or “SS+CC”. Infants randomized to 3:1 received coordinated CC and ventilation according to the current resuscitation guidelines. Infants randomized to “SI+CC” received uninterrupted CC at a rate of 90/min superimposed by a SI of 30 sec. The default settings for airway pressures were peak inflation pressure of 24 cm H2O and a positive end expiratory pressure of 6 cm H2O. The primary outcome was duration of CC to achieve ROSC. Deferral of consent was approved by the institutional ethics committee. The trial was registered at ClinicalTrials.gov: NCT02083705. RESULTS: Five infants were randomized to each group; the mean (range) gestational age was 25 (24–27) weeks vs. 26 (23–28) weeks in the in the SI+CC and 3:1 group (P=0.433), respectively. Mean (SD) birth weight in the SI+CC group was 797 (208) g vs. 808 (182) g in the 3:1 group, (P=0.465) respectively. Mean (SD) ROSC was significantly decreased in the SI+CC group with 31 (8) sec vs. 138 (72) sec in the 3:1 group (P=0.011). One infant in each group died and only one infant in the 3:1 group received epinephrine. One infant in the SI+CC group and three in the 3:1 had intracranial hemorrhage grade 3 or greater. Three infants in the SI+CC group had necrotizing enterocolitis vs. one infant in the 3:1 group (P=0.197). CONCLUSION: Preterm infants <33 weeks had significant shorter ROSC when CC were superimposed by SI compared to using 3:1.

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What's new in pulmonary hypertension clinical research: lessons from the best abstracts at the 2020 American Thoracic Society International Conference.

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