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Cardiovascular biomarkers in patients with acute decompensated heart failure randomized to sacubitril-valsartan or enalapril in the PIONEER-HF trial SPECT and PET in ischemic heart failure Mechanical circulatory support devices in advanced heart failure: 2020 and beyond Safety of six-month dual antiplatelet therapy after second-generation drug-eluting stent implantation: OPTIMA-C Randomised Clinical Trial and OCT Substudy Sex Differences in Cardiovascular Pathophysiology: Why Women Are Overrepresented in Heart Failure With Preserved Ejection Fraction Comparison of intravascular ultrasound versus angiography-guided drug-eluting stent implantation: a meta-analysis of one randomised trial and ten observational studies involving 19,619 patients Intravascular ultrasound predictors for edge restenosis after newer generation drug-eluting stent implantation Second-generation drug-eluting stent implantation followed by 6- versus 12-month dual antiplatelet therapy: the SECURITY randomized clinical trial Phenotypic Refinement of Heart Failure in a National Biobank Facilitates Genetic Discovery Intravascular ultrasound-guided vs angiography-guided drug-eluting stent implantation in complex coronary lesions: Meta-analysis of randomized trials

Clinical Trial2018 May 22. [Epub ahead of print]

JOURNAL:Chest. Article Link

The association between body mass index and obesity with survival in pulmonary arterial hypertension

Weatherald J, Huertas A, Boucly A et al. Keywords: body mass index; obesity; prognosis; pulmonary arterial hypertension; survival

ABSTRACT


BACKGROUNDAn obesity paradox, wherein obese patients have lower mortality, has been described in cardiopulmonary diseases, including pulmonary arterial hypertension (PAH). Our objective was to determine whether obesity and body mass index (BMI) are associated with mortality in patients with PAH.


METHODS - We assessed incident patients with idiopathic, drug-induced, and heritable PAH from the French PAH Registry. Cox regression and Kaplan-Meier analysis were used to assess the association between BMI and obesity with all-cause mortality.

RESULTS - Of 1255 patients included, 30% were obese. A higher proportion of females (65.1% vs 53.4%, p<0.01), drug-induced PAH (28.9% vs 9.2%, p<0.01), systemic hypertension, diabetes, and hypothyroidism were present in the obese group. More obese patients were in New York Heart Association class III (66.4% vs. 57.1%), fewer were class IV (11.8% vs 16.9%) (p<0.01), and 6-minute walk distance was lower (276±121 vs 324±146, p<0.01). Right atrial pressure, pulmonary wedge pressure and cardiac index were higher while pulmonary vascular resistance was lower in obese patients. Neither BMI (HR 0.99, 95%CI 0.97-1.01, p=0.41) nor obesity (HR 1.0, 95%CI 0.99-1.01, p=0.46) were associated with mortality in multivariable analyses. There was a significant interaction between age and obesity such that mortality increased among morbidly obese patients under 65 years old (HR 3.01, 95%CI 1.56-5.79, p=0.001).

CONCLUSIONS - Obesity was not associated with mortality in the overall population, but there was an age-obesity interaction with increased mortality among young morbidly obese patients. These results have implications for active weight management in younger morbidly obese patients who are otherwise candidates for lung transplantation.

Copyright © 2018. Published by Elsevier Inc.