نتایج جستجو برای: 75 maximal heart rate

تعداد نتایج: 1440258  

2014
Hugo V. Reis Audrey Borghi-Silva Aparecida M. Catai Michel S. Reis

BACKGROUND Chronic heart failure (CHF) leads to exercise intolerance. However, non-invasive ventilation is able to improve functional capacity of patients with CHF. OBJECTIVES The aim of this study was to evaluate the effectiveness of continuous positive airway pressure (CPAP) on physical exercise tolerance and heart rate variability (HRV) in patients with CHF. Method : Seven men with CHF (62...

Journal: :Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas 1997
J R Fioretto M P Okoshi K Okoshi A C Cicogna R C Bonatto C R Padovani P J Tucci

The influence of afterload on the rate of force generation by the myocardium was investigated using two types of preparations: the in situ dog heart (dP/dt) and isolated papillary muscle of rats (dT/dt). Thirteen anesthetized, mechanically ventilated and thoracotomized dogs were submitted to pharmacological autonomic blockade (3.0 mg/kg oxprenolol plus 0.5 mg/kg atropine). A reservoir connected...

Journal: :acta medica iranica 0
hooman hossein nejad department of emergency medicine, sina hospital, tehran university of medical sciences, tehran, iran. mohsen banaie department of emergency medicine, sina hospital, tehran university of medical sciences, tehran, iran. seyed hossein seyedhosseini davarani department of emergency medicine, sina hospital, tehran university of medical sciences, tehran, iran. zahra khazaeipour brain and spinal cord injury research center, tehran university of medical sciences, tehran, iran.

the emergency severity index (esi) is a five-level triage system that has shown promising reliability and validity. according to esi algorithm, in the presence of danger zone respiratory rate (rr), heart rate (hr) or oxygen (o2) saturation, patients should be up-triaged from esi level 3 to 2 hence, the current study aimed to investigate the value of the measurement of vital signs in predicting ...

2016
Indranil Manna Gulshan Lal Khanna

Creatine has beneficial effect on strength training athletes, but it is not clear whether it has any effect on endurance sport. Present study has been designed to investigate the effect of creatine supplementation on cardiovascular adaptation to sub maximal exercise and endurance performance. A total of 60 male athletes (age range 16-19 years) were selected and randomly divided into experimenta...

Journal: :American journal of obstetrics and gynecology 1992
M B van Doorn F K Lotgering P C Struijk J Pool H C Wallenburg

In a longitudinal study we investigated some cardiovascular responses to strenuous bicycle exercise in 33 healthy women during pregnancy and the postpartum period. The exercise electrocardiogram demonstrated depression of the ST segment in 12% of women in the absence of clinical signs of ischemia, and the incidence of these changes was unaffected by pregnancy. In spite of slightly different blo...

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