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2006•Unpublished venueRequires access

Relationship between Heart Rate Turbulence and Heart Rate Variability in Korean Adults with Structurally Normal Heart

Ji-Ho Yoon, Jin-Ho Kang, Byung Jin Kim, Ki‐Chul Sung, Bum‐Soo Kim, Man‐Ho Lee, Jung-Ro Park, Hun Sub Shin

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Abstract

Background and Objectives：Heart rate variability (HRV) illustrates the autonomic integration of the heart. Depressed HRV has been proven to be associated with an increased risk of cardiac death, whereas heart rate turbu-lence (HRT) is believed to reflect baroreflex sensitivity and it was recently introduced as another noninvasive tool for risk stratification. The aim of this study was to determine the relationship between the HRT and HRV parameters in Korean adults with a structurally normal heart. Subjects and Methods：We studied 61 adults (males: 31) who showed ventricular premature complexes on 24 hour Holter recording and who were found to have normal hearts on full noninvasive investigation. We calculated the mean heart rate (RR interval), the number of VPBs, the time- and frequency-domain HRV parameters and two HRT parameters: turbulence onset (To) and turbulence slope (Ts). Results：Ts showed a strong correlation with the HRV parameters (LF/HF ratio: r=0.35,

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Background and Objectives：Heart rate variability (HRV) illustrates the autonomic integration of the heart. Depressed HRV has been proven to be associated with an increased risk of cardiac death, whereas heart rate turbu-lence (HRT) is believed to reflect baroreflex sensitivity and it was recently introduced as another noninvasive tool for risk stratification. The aim of this study was to determine the relationship between the HRT and HRV parameters in Korean adults with a structurally normal heart. Subjects and Methods：We studied 61 adults (males: 31) who showed ventricular premature complexes on 24 hour Holter recording and who were found to have normal hearts on full noninvasive investigation. We calculated the mean heart rate (RR interval), the number of VPBs, the time- and frequency-domain HRV parameters and two HRT parameters: turbulence onset (To) and turbulence slope (Ts). Results：Ts showed a strong correlation with the HRV parameters (LF/HF ratio: r=0.35,

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Available abstract

Background and Objectives：Heart rate variability (HRV) illustrates the autonomic integration of the heart. Depressed HRV has been proven to be associated with an increased risk of cardiac death, whereas heart rate turbu-lence (HRT) is believed to reflect baroreflex sensitivity and it was recently introduced as another noninvasive tool for risk stratification. The aim of this study was to determine the relationship between the HRT and HRV parameters in Korean adults with a structurally normal heart. Subjects and Methods：We studied 61 adults (males: 31) who showed ventricular premature complexes on 24 hour Holter recording and who were found to have normal hearts on full noninvasive investigation. We calculated the mean heart rate (RR interval), the number of VPBs, the time- and frequency-domain HRV parameters and two HRT parameters: turbulence onset (To) and turbulence slope (Ts). Results：Ts showed a strong correlation with the HRV parameters (LF/HF ratio: r=0.35,

Key concepts: Heart rate turbulence, Heart rate variability, Medicine, Baroreflex, Cardiology, Internal medicine, Heart rate, Blood pressure

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