Radionuclide imaging correlatives of heart rate impairment during maximal exercise testing
نویسندگان
چکیده
منابع مشابه
[Heart rate response and its variability during different phases of maximal graded exercise].
PURPOSE Heart rate variability (HRV) has been studied at rest as a non-invasive tool for the assessment of cardiac autonomic control and, its attenuation is related to cardiovascular risk. However, during exercise, when important neural changes take place, HRV behaviour is not well established. The aim of this investigation was to study the heart rate (HR) and HRV responses during the different...
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Heart rate variability (HRV) is the present oscillation of the heart rate. The interest in HRV as a parameter of the parasympathetic and sympathetic influence of the autonomic nervous system on the heart has increased in the last few decades (Kaikkonen et al., 2007). It is known that its influence changes under different conditions such as rest, exercise or mental stress and different body post...
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Simple exercise tolerance tests, such as stepping on and off a stool a given number of times and noting the effect on the pulse rate, have long been used in medical practice. Almost invariably, however, the pulse rate is taken before and after, owing to the difficulty of counting it during the exercise. This may be overcome by means of a recording apparatus such as that of Bell and Knox (1938);...
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The use of heart rate variability (HRV) parameters during exercise is not supported by appropriate reliability studies. In 80 healthy adults, ECG was recorded during three 6 min bouts of exercise, separated by 6 min of unloaded cycling. Two bouts were at a moderate intensity while the final bout was at a heavy exercise intensity. This protocol was repeated under the same conditions on three occ...
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The ECG at presentation shows an irregular baseline and no P-waves, suggesting atrial fibrillation. A regular multiform ventricular bigeminy with fixed coupling interval can be appreciated, which could be typically seen in digitalis intoxication [1]. Other potential ECG features of digitalis intoxication include decreased AV conduction (because of increased vagal effects on the AV node), possib...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1983
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(83)80228-9