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- W2076320845 abstract "Blockade of the renin-angiotensin system (RAS) by ACE inhibitors has been demonstrated to reduce total mortality in cardiovascular diseases. This advantage was attributed in part to changes of autonomic cardiovascular control, exemplified by an increase of heart rate variability (HRV) and baroreflex gain (BRG). We sought to assess the effects of the angiotensin type 1 (AT1) receptor blocker eprosartan on HRV and BRG.In a double-blind randomized cross-over design 25 young males took eprosartan (600 mg/day) and placebo each for a period of 7 days with a wash-out period of at least 4 weeks in between. At the end of the intake phases simultaneous recordings of arterial blood pressure (AP; Finapres) and electrocardiogram (ECG) were taken. Power spectra of HRV and arterial blood pressure variability (APV) were calculated by fast Fourier transform (FFT) and served to calculate BRG. Ang-II levels were measured by radioimmunoassay.Eprosartan tended to lower mean AP, it slightly increased heart rate (HR) (p<0.05), and markedly increased circulating Ang-II levels (p<0.01). Eprosartan diminished the total power of HRV (p<0.05) and the BRG (p<0.01). The low/high frequency (LF/HF) ratio of HRV and the APV were not altered.AT1 antagonism by eprosartan lowers heart rate variability and baroreflex gain. We speculate that these findings are due to the marked increase in circulating angiotensin II (Ang II). Further studies are needed to clarify whether angiotensin type 1 (AT1) blockers with potential actions inside the blood-brain barrier (BBB) may have different effects on HRV and BRG." @default.
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- W2076320845 date "2003-08-01" @default.
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- W2076320845 title "AT1 antagonism by eprosartan lowers heart rate variability and baroreflex gain" @default.
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- W2076320845 doi "https://doi.org/10.1016/s1566-0702(03)00053-5" @default.
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