Differences in Heart Rate Variability Between Cardioinhibitory and Vasodepressor Responses to Head-Up Tilt Table Testing

Guzmán, Carlos E; Sánchez, Gustavo; Márquez, Manlio F.; Hermosillo, Antonio G.; Cárdenas, Manuel

doi:10.1016/s0188-0128(99)00022-6

Cited by 20 publications

(11 citation statements)

References 19 publications

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“…In patients with CT genotype, LF/HF after tilting remained almost unchanged. Changes of HRV in CC genotype patients, in our study seem to be similar with changes described by Guzman et al for vasodepressor syncope (27). Vasodepressor type of syncope (55.26 %) was mainly represented in this genotype in our study.…”

Section: Discussionsupporting

confidence: 91%

Beta 3 subunit of G-protein and its influence on autonomic nervous system in patients with vasovagal syncope

Evin¹,

Mitro²,

Habalová³

et al. 2016

BLL

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OBJECTIVES: The aim of this prospective study was to investigate the impact of genetic polymorphisms of β3 subunit of G-protein on the occurrence of vasovagal syncope, hemodynamic parameters and heart rate variability during head-up tilt test (HUT). BACKGROUND: G-proteins play an important role in the intracellular transmission of impulses in cardiovascular autonomic refl exes. METHODS: In 157 patients with suspected vasovagal syncope HUT was performed. Ninety-one patients (38 men, 53 women, mean age 48 ± 17 years) had positive HUT. Control group consisted of 109 subjects (69 men, 40 women, mean age 37 ± 16 years) with no history of syncope. Results of HUT, hemodynamic parameters and LF, HF, LF/HF, SDNN, RMSSD parameters of heart rate variability were compared in patients with different genotypes. C825T polymorphism of β3 subunit of G-protein was determined in the study subjects.

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Section: Discussionsupporting

confidence: 91%

Beta 3 subunit of G-protein and its influence on autonomic nervous system in patients with vasovagal syncope

Evin¹,

Mitro²,

Habalová³

et al. 2016

BLL

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“…Guzman et al19) found increased parasympathetic activity indicated by significant increases in RMSSD in patients with cardioinhibitory type response, and sympathetic activity predominance indicated by significant decreases in RMSSD in vasodepressor type response during HUT test. In our study, we could not be distinguished cardioinhibitory type with vasodepressor type because our patient was asymptomatic state.…”

Section: Discussionmentioning

confidence: 99%

Baseline heart rate variability in children and adolescents with vasovagal syncope

et al. 2014

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PurposeThis study aimed to evaluate the autonomic imbalance in syncope by comparing the baseline heart rate variability (HRV) between healthy children and those with vasovagal syncope.MethodsTo characterize the autonomic profile in children experiencing vasovagal syncope, we evaluated the HRV of 23 patients aged 7-18 years and 20 healthy children. These children were divided into preadolescent (<12 years) and adolescent groups. The following time-domain indices were calculated: root mean square of the successive differences (RMSSD); standard deviation of all average R-R intervals (SDNN); and frequency domain indices including high frequency (HF), low frequency (LF), normalized high frequency, normalized low frequency, and low frequency to high frequency ratio (LF/HF).ResultsHRV values were significantly different between healthy children and those with syncope. Student t test indicated significantly higher SNDD values (60.46 ms vs. 37.42 ms, P=0.003) and RMSSD (57.90 ms vs. 26.92 ms, P=0.000) in the patient group than in the control group. In the patient group, RMSSD (80.41 ms vs. 45.89 ms, P=0.015) and normalized HF (61.18 ms vs. 43.19 ms, P=0.022) were significantly higher in adolescents, whereas normalized LF (38.81 ms vs. 56.76 ms, P=0.022) and LF/HF ratio (0.76 vs. 1.89, P=0.041) were significantly lower in adolescents. In contrast, the control group did not have significant differences in HRV values between adolescents and preadolescents.ConclusionThe results of this study indicated that children with syncope had a decreased sympathetic tone and increased vagal tone compared to healthy children. Additionally, more severe autonomic imbalances possibly occur in adolescents than in preadolescents.

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“…In most of the studies inquiring into vasovagal faints using standard HRV parameters, the baseline characteristics of patients with a history of fainting were used, but various reactions during HUTT did not vary [3][4][5][6][7]. However, some differences were noted if the studied groups were divided according to the type of vasovagal reaction [12,13]. This suggests that various types of vasovagal syncope (e.g., mixed, cardiodepressive and vasodepressive) differ so much in heart rate properties that no specific features can be found in groups that combine all types of VVS.…”

Section: Neg Vs Vvs_2 Groupsmentioning

confidence: 99%

“…Therefore, it seems reasonable to perform analyses of HRV indices considering subgroups with different mechanisms of syncope. Guzman et al [12] reported that baseline spectral HRV parameters were significantly different in patients with the cardiodepressivecompared with vasodepressive-type of reaction to HUTT performed during spontaneous breathing.…”

Section: Introductionmentioning

confidence: 99%

Entropy Measures in the Assessment of Heart Rate Variability in Patients with Cardiodepressive Vasovagal Syncope

Graff

Makowiec

et al. 2015

Entropy

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Sample entropy (SampEn) was reported to be useful in the assessment of the complexity of heart rate dynamics. Permutation entropy (PermEn) is a new measure based on the concept of order and was previously shown to be accurate for short, non-stationary datasets. The aim of the present study is to assess if SampEn and PermEn obtained from baseline recordings might differentiate patients with various outcomes of the head-up tilt test (HUTT). Time-domain heart rate variability (HRV) indices and several nonlinear parameters were calculated using 500 RR interval-long ECG recordings done before tilting in patients with a history suggesting vasovagal syncope. Groups of patients with so-called cardiodepressive vasovagal syncope (VVS_2) during HUTT and patients who did not faint during the test were compared. Two types of HUT tests were analyzed: with spontaneous (SB) or controlled breathing (CB). In our study, SampEn was higher in VVS_2 patients during SB, and PermEn was higher in VVS_2 patients during CB. Irrespective of the type of breathing during the test, SampEn and PermEn were similar in patients with the Entropy 2015, 17 1008 same type of reaction during HUTT. The use of several entropy-based parameters seems to be useful in HRV assessment in patients with vasovagal fainting.

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Differences in Heart Rate Variability Between Cardioinhibitory and Vasodepressor Responses to Head-Up Tilt Table Testing

Cited by 20 publications

References 19 publications

Beta 3 subunit of G-protein and its influence on autonomic nervous system in patients with vasovagal syncope

Beta 3 subunit of G-protein and its influence on autonomic nervous system in patients with vasovagal syncope

Baseline heart rate variability in children and adolescents with vasovagal syncope

Entropy Measures in the Assessment of Heart Rate Variability in Patients with Cardiodepressive Vasovagal Syncope

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