منابع مشابه
Heart rate variability, QT variability, and electrodermal activity during exercise.
PURPOSE Various measures of autonomic function have been developed, and their applicability and significance during exercise are controversial. METHODS Physiological data were therefore obtained from 23 sport students before, during, and after exercise. Measures of R-R interval variability, QT variability index (QTvi), and electrodermal activity (EDA) were calculated. We applied an incrementa...
متن کاملEffect of percutaneous transluminal coronary angioplasty on QT dispersion and heart rate variability parameters
BACKGROUND The aim of the study was to analyse parameters reflecting the sympathovagal control of ventricular depolarisation and repolarisation [heart rate variability (HRV) and QT interval dispersion (QTd)] in patients undergoing elective percutaneous transluminal coronary angioplasty (PTCA), and determine whether HRV correlates with QT dispersion parameters. METHODS The study consisted of 2...
متن کاملChanges in heart rate variability and QT dispersion in patients with overt hypothyroidism.
OBJECTIVE The aim of the present study was to evaluate the effect of clinical hypothyroidism on cardiovascular autonomic function and ventricular repolarization. DESIGN AND METHODS We studied 31 patients (22 females and 9 males; mean age 53.6+/-11.8 years) with overt hypothyroidism (TSH=56.2+/-14.7 microU/ml, low free thyroxine (T4), free tri-iodothyronine (T3)) and 31 euthyroid controls, to ...
متن کاملEffects of fluorosis on QT dispersion, heart rate variability and echocardiographic parameters in children.
OBJECTIVE Chronic fluoride poisoning is called fluorosis. The aim of the study was to investigate effects of fluorosis on cardiovascular system in children by measuring QT dispersion (QTd), corrected QT dispersion (QTcd), heart rate variability (HRV) and echocardiography findings. METHODS Thirty-five children with dental fluorosis and 26 children as control group were included in this cross-s...
متن کاملCircadian variation in the effects of aldosterone blockade on heart rate variability and QT dispersion in congestive heart failure.
OBJECTIVES The study was designed to comprehensively evaluate the circadian effects of aldosterone blockade on autonomic tone and QT dispersion in chronic heart failure (CHF). BACKGROUND Spironolactone therapy given in addition to angiotensin-converting enzyme inhibitors improved survival in CHF, but the mechanism of its benefit is uncertain. Experimental evidence suggests that aldosterone ma...
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ژورنال
عنوان ژورنال: European Heart Journal
سال: 1996
ISSN: 0195-668X,1522-9645
DOI: 10.1093/oxfordjournals.eurheartj.a014827