In:
European Journal of Heart Failure, Wiley, Vol. 18, No. 5 ( 2016-05), p. 545-553
Abstract:
Obesity has been found to be protective in heart failure ( HF ), a finding leading to the concept of an obesity paradox. We hypothesized that a preserved cardiorespiratory fitness in obese HF patients may affect the relationship between survival and body mass index ( BMI ) and explain the obesity paradox in HF . Methods and results A total of 4623 systolic HF patients ( LVEF 31.5 ± 9.5%, BMI 26.2 ± 3.6 kg/m 2 ) were recruited and prospectively followed in 24 Italian HF centres belonging to the MECKI Score Research Group. Besides full clinical examination, patients underwent maximal cardiopulmonary exercise test at study enrolment. Median follow‐up was 1113 (553–1803) days. The study population was divided according to BMI ( 〈 25, 25–30, 〉 30 to ≤35 kg/m 2 ) and predicted peak oxygen consumption (peak VO 2 , 〈 50%, 50–80%, 〉 80%). Study endpoints were all‐cause and cardiovascular deaths including urgent cardiac transplant. All‐cause and cardiovascular deaths occurred in 951 (28.6%, 57.4 per person‐years) and 802 cases (17.4%, 48.4 per 1000 person‐years), respectively. In the high BMI groups, several prognostic parameters presented better values [ LVEF , peak VO 2 , ventilation/carbon dioxide slope, renal function, and haemoglobin ( P 〈 0.01)] compared with the lower BMI groups. Both BMI and peak VO 2 were significant positive predictors of longer survival: both higher BMI and peak VO 2 groups showed lower mortality ( P 〈 0.001). At multivariable analysis and using a matching procedure (age, gender, LVEF , and peak VO 2 ), the protective role of BMI disappeared. Conclusion Exercise tolerance affects the relationship between BMI and survival. Cardiorespiratory fitness mitigates the obesity paradox observed in HF patients.
Type of Medium:
Online Resource
ISSN:
1388-9842
,
1879-0844
DOI:
10.1002/ejhf.2016.18.issue-5
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
1500332-2
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