scholarly journals SHORT-TERM SPECTRAL ANALYSIS OF HEART RATE VARIABILITY DURING SUPINE-STANDING-SUPINE TEST IN PATIENTS WITH PAROXYSMAL ATRIAL FIBRILLATION

2004 ◽  
Vol 148 (1) ◽  
pp. 63-67 ◽  
Author(s):  
Jan Galuszka ◽  
Jaroslav Opavsky ◽  
Jan Lukl ◽  
Pavel Stejskal ◽  
Jana Zapletalova ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Paroxysmal Atrial Fibrillation ◽  
Short Term

scholarly journals P095 Heart Rate Variability during Sleep in Paroxysmal Atrial Fibrillation patients with and without Obstructive Sleep Apnoea

2021 ◽  
Vol 2 (Supplement_1) ◽  
pp. A52-A52
Author(s):  
A Mohammadieh ◽  
H Dissanayake ◽  
K Sutherland ◽  
S Ucak ◽  
P de Chazal ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Obstructive Sleep Apnoea ◽  
Paroxysmal Atrial Fibrillation ◽  
Sleep Apnoea ◽  
Relative Reduction ◽  
Obstructive Sleep ◽  
Sympathetic Modulation ◽  
Ectopic Beats

Abstract Introduction Physiological studies have demonstrated the importance of the autonomic nervous system in mediating acute apnoea-induced atrial fibrillation (AF). We aimed to compare Heart Rate Variability (HRV) markers of autonomic function in paroxysmal atrial fibrillation (PAF) patients with and without obstructive sleep apnoea (OSA). A secondary aim was the analysis of ectopic beats in these groups. Methods Nocturnal ECG traces from 89 PAF patients who underwent in-laboratory polysomnography were included. After identifying ectopic beats in the ECGs, periods of arrhythmia as well as sleep apnoea events were excluded. HRV time and frequency domains were reported by sleep stage (REM vs Non-REM) for patients with and without OSA. Results Frequency domain analysis of HRV during non-REM sleep in PAF patients with OSA showed increased cardiac parasympathetic modulation (HF-nu: 39.13 ± 15.74 vs 47.98 ± 14.60, p = 0.008*) and reduced cardiac sympathetic modulation (LF/HF ratio: 2.05 ± 2.02 vs 1.17 ± 0.98, p = 0.007*). Results remained significant after adjusting for age, sex and BMI (adjusted p values 0.024 and 0.018 respectively). PAF patients with severe OSA (AHI ≥ 30/hr) had more AF beats and Ventricular Ectopic Beats than those without severe OSA (22.7 ± 42.8% vs 3.7 ± 17.9%, p = 0.006*, 1.7 ± 3.8 vs 0.3 ± 0.9%, p = 0.004* respectively). Conclusions This is the first study of HRV in AF patients with and without OSA. It suggests a chronic increase in parasympathetic nervous modulation and relative reduction in sympathetic modulation in PAF patients with OSA.

Spectral analysis of heart rate variability of lizard, Gallotia galloti

1988 ◽  
Vol 254 (2) ◽  
pp. R242-R248 ◽  
Author(s):  
J. Gonzalez Gonzalez ◽  
L. De Vera Porcell
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Body Temperature ◽  
Short Term ◽  
Spectral Components ◽  
Frequency Components ◽  
Transient Interactions ◽  
Beat Heart ◽  
Gallotia Galloti

The beat-to-beat heart rate of the lizard, Gallotia galloti, at rest shows short-term oscillations, the frequency of which varies with body temperature. Spectral analysis of the heart rate variability signal shows that, above 20 degrees C, two major frequency components are present: the first component has a mean frequency ranging from 0.032 at 20 degrees C to 0.070 Hz at 35 degrees C and the second from 0.039 at 20 degrees C to 0.10 Hz at 35 degrees C of body temperature. The beat-to-beat heart rate variability does not seem to be correlated with ventilatory activity. The two spectral components could be associated as in mammals with the activity of the control systems that regulate the circulation, especially with the cutaneous vasomotor thermoregulatory and endogenous pressure vasomotor activities. Transient interactions between both components are described.

scholarly journals Power Spectral Analysis of Heart Rate Variability in a Horse with Atrial Fibrillation.

1998 ◽  
Vol 60 (1) ◽  
pp. 111-114 ◽  
Author(s):  
Masayoshi KUWAHARA ◽  
Atsushi HIRAGA ◽  
Tsurayuki NISHIMURA ◽  
Hirokazu TSUBONE ◽  
Shigeru SUGANO
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Power Spectral Analysis ◽  
Power Spectral

scholarly journals Cryoballoon Versus High-Power, Short-Duration Radiofrequency Ablation for Pulmonary Vein Isolation in Patients With Paroxysmal Atrial Fibrillation

2021 ◽  
Vol 14 (9) ◽  
Author(s):  
Hui-Nam Pak ◽  
Je-Wook Park ◽  
Song-Yi Yang ◽  
Tae-Hoon Kim ◽  
Jae-Sun Uhm ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Pulmonary Vein ◽  
Pulmonary Vein Isolation ◽  
High Power ◽  
Paroxysmal Atrial Fibrillation ◽  
Antiarrhythmic Drugs ◽  
Procedure Time

Background: The efficacy of cryoballoon pulmonary vein isolation (Cryo-PVI) is equivalent to that of radiofrequency pulmonary vein isolation in patients with paroxysmal atrial fibrillation (AF). We aimed to compare the efficacy and safety profile of Cryo-PVI and high-power, short-duration (HPSD) radiofrequency catheter ablation (RFCA) in patients with AF. Methods: We prospectively randomized 314 patients with paroxysmal AF (men, 71.3%; 59.9±10.9 years old) to either the Cryo-PVI group (n=156) or HPSD-RFCA group (n=158). Cavotricuspid isthmus ablation and linear ablation from the superior vena cava to the right atrial septum in addition to pulmonary vein isolation were carried out in the majority of patients in the HPSD-RFCA group. The primary end point was AF recurrence after a single procedure; secondary end points were the recurrence pattern, cardioversion rate, follow-up heart rate variability, and response to antiarrhythmic drugs. Results: After a mean follow-up of 9.8±5.1 months, the clinical recurrence rate did not significantly differ between the two groups (log-rank P =0.840). The rate of recurrence as atrial tachycardia ( P >0.999), cardioversion ( P =0.999), and 3-month heart rate variability (high frequency; P =0.506) did not significantly differ. During the final follow-up, sinus rhythm was maintained without antiarrhythmic drugs in 70.5% of the Cryo-PVI group and 73.4% of the HPSD-RFCA group ( P =0.567). No significant difference was found in the major complication rate between the two groups (3.8% versus 0.6%; P =0.066), but total procedure time was significantly shorter in the Cryo-PVI group (78.5±20.2 versus 124.5±37.1 minutes; P <0.001). Conclusions: In patients with paroxysmal AF, the Cryo-PVI is an effective rhythm-control strategy with a shorter procedure time compared with the HPSD-RFCA. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03920917.

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