Z Aktop1, H Tanrıverdi2, F Uygur2, A İşleyen3, B Kalaycı3, Y C Gursoy3, T Karabağ3, M Aydın3, I Akpınar3. 1. Faculty of Medicine, Department of Cardiology, Bülent Ecevit University, 67600, Kozlu/Zonguldak, Turkey. dr.ziyaeddin@outlook.com. 2. Faculty of Medicine, Department of Pulmonary Medicine, Bülent Ecevit University, Zonguldak, Turkey. 3. Faculty of Medicine, Department of Cardiology, Bülent Ecevit University, 67600, Kozlu/Zonguldak, Turkey.
Abstract
BACKGROUND: The aim of this study was to evaluate autonomic nervous system function by measuring heart rate variability (HRV) in patients with sarcoidosis without known cardiac manifestations. PATIENTS AND METHODS: The study comprised 61 participants, including 31 patients with sarcoidosis without known cardiac manifestations and 30 healthy volunteers. All participants underwent echocardiographic examination, 12-channel electrocardiography (ECG), and 24-h Holter monitoring. HRV parameters were determined and compared between the groups. RESULTS: There were no differences between groups with regard to age, body mass index, systolic and diastolic blood pressure, or heart rate at the time of admission. In the time domain analyses, the 24-h, daytime, and night-time standard deviations of all normal-to-normal R‑R interval (SDNN) values were significantly lower in patients with sarcoidosis than those in the controls. The frequency domain analyses showed that 24-h and daytime low-frequency (LF) values, 24-h, daytime, and night-time high-frequency (HF) values were significantly lower in the patient group compared with the control group, whereas the night-time LF/HF ratio was significantly higher. CONCLUSION: Although Holter ECG is not a diagnostic tool for cardiac sarcoidosis, the HRV parameters, especially the night-time LF/HF values, may demonstrate increased sympathetic activation in patients with sarcoidosis.
BACKGROUND: The aim of this study was to evaluate autonomic nervous system function by measuring heart rate variability (HRV) in patients with sarcoidosis without known cardiac manifestations. PATIENTS AND METHODS: The study comprised 61 participants, including 31 patients with sarcoidosis without known cardiac manifestations and 30 healthy volunteers. All participants underwent echocardiographic examination, 12-channel electrocardiography (ECG), and 24-h Holter monitoring. HRV parameters were determined and compared between the groups. RESULTS: There were no differences between groups with regard to age, body mass index, systolic and diastolic blood pressure, or heart rate at the time of admission. In the time domain analyses, the 24-h, daytime, and night-time standard deviations of all normal-to-normal R‑R interval (SDNN) values were significantly lower in patients with sarcoidosis than those in the controls. The frequency domain analyses showed that 24-h and daytime low-frequency (LF) values, 24-h, daytime, and night-time high-frequency (HF) values were significantly lower in the patient group compared with the control group, whereas the night-time LF/HF ratio was significantly higher. CONCLUSION: Although Holter ECG is not a diagnostic tool for cardiac sarcoidosis, the HRV parameters, especially the night-time LF/HF values, may demonstrate increased sympathetic activation in patients with sarcoidosis.
Authors: Silvia G Priori; Carina Blomström-Lundqvist; Andrea Mazzanti; Nico Blom; Martin Borggrefe; John Camm; Perry Mark Elliott; Donna Fitzsimons; Robert Hatala; Gerhard Hindricks; Paulus Kirchhof; Keld Kjeldsen; Karl-Heinz Kuck; Antonio Hernandez-Madrid; Nikolaos Nikolaou; Tone M Norekvål; Christian Spaulding; Dirk J Van Veldhuisen Journal: Rev Esp Cardiol (Engl Ed) Date: 2016-02
Authors: Jefferson Curimbaba; Silvia Carla Souza Rodrigues; José Marcos Moreira; Lenine Ângelo Alves Silva; Carlos Alberto de Castro Pereira; João Pimenta Journal: Arq Bras Cardiol Date: 2011-04-01 Impact factor: 2.000