Anatomical dead space, ventilatory pattern, and exercise capacity in chronic heart failure.
نویسندگان
چکیده
منابع مشابه
Anatomical dead space, ventilatory pattern, and exercise capacity in chronic heart failure.
BACKGROUND Patients with chronic heart failure have an excessive ventilatory response to exercise, characterised by an increase in the slope of the relation between ventilation and carbon dioxide production (VE/VCO2 slope). Patients have an altered respiratory pattern with an increased respiratory rate (f) at a given tidal volume (VT), which may result in increased anatomical dead space ventila...
متن کاملExercise capacity and prognosis in chronic heart failure.
The association among fitness, health, and longevity is probably as old as there are historical records. The writings of the classic Greek physicians Herodicus, Hippocrates, and Galen are replete with references to fitness, and each believed that a healthy body was a prerequisite for mental well-being.1 The US founding fathers were also conscious of the importance of fitness. Benjamin Franklin ...
متن کاملPattern of ventilation during exercise in chronic heart failure.
OBJECTIVE To determine the pattern of the abnormal ventilatory response in heart failure and how it relates to symptoms by looking at tidal volume (VT) and frequency (f) during exercise. METHODS 45 patients with heart failure and 21 controls underwent maximal treadmill based exercise testing with metabolic gas exchange analysis. The relation of ventilation (VE) to VT was plotted to look for a...
متن کاملCycle exercise causes a lower ventilatory response to exercise in chronic heart failure.
P atients with chronic heart failure (CHF) complain of breathlessness and fatigue. Their exercise limitation can be assessed by incremental exercise testing with metabolic gas exchange to derive peak oxygen consumption (pV̇O2). The slope of the relation between ventilation (V̇E) and carbon dioxide production (V̇CO2), V̇E/V̇CO2 can characterise the ventilatory response to exercise. CHF patients have ...
متن کاملLeptin and the ventilatory response to exercise in heart failure.
OBJECTIVES The aim of the study was to test the hypothesis that leptin is involved in the regulation of ventilatory responses to exercise in chronic heart failure (CHF). BACKGROUND Exercise-induced hyperventilation is a negative prognostic factor in CHF. Studies in animals suggest that leptin, a hormone secreted by adipocytes, contributes to the regulation of respiration. Plasma leptin levels...
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ژورنال
عنوان ژورنال: Heart
سال: 1995
ISSN: 1355-6037
DOI: 10.1136/hrt.74.4.377