کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5926099 1167338 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamic pulmonary hyperinflation occurs without expiratory flow limitation in chronic heart failure during exercise
ترجمه فارسی عنوان
هیپرپلونیک پویا ریه بدون محدودیت جریان انقباض در نارسایی مزمن قلبی در طول ورزش اتفاق می افتد
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی فیزیولوژی
چکیده انگلیسی
To assess the occurrence of tidal expiratory flow limitation (EFL) and/or dynamic pulmonary hyperinflation (DH) in chronic heart failure (CHF) during exercise 15 patients with stable systolic CHF, aged 69 ± 6 yr, underwent pulmonary function testing and incremental cardio-pulmonary exercise testing. They subsequently performed constant load exercise testing at 30, 60 and 90% of respective maximum workload. At each step the presence of EFL, by negative expiratory pressure technique, and changes in inspiratory capacity (IC) were assessed. Ejection fraction amounted to 36 ± 6% and V˙O2, peak (77 ± 19% pred.) was reduced. EFL was absent at any step during constant load exercise. In 6 patients IC decreased more than 10% pred. at highest step. Only in these patients TLC, FRC, RV FEF25-75% and DLCO were decreased at rest. V˙O2, peak correlated with DLCO, TLC and IC at rest and with IC (r2 = 0.59; p < 0.001) and decrease in IC (r2 = 0.44; p < 0.001) at 90% of maximum workload. During exercise CHF patients do not exhibit EFL, but some of them develop DH that is associated with lower V˙O2, peak.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Respiratory Physiology & Neurobiology - Volume 189, Issue 1, 1 October 2013, Pages 34-41
نویسندگان
, , , , , ,