Assessment of autonomic function in septal hypertrophic cardiomyopathy

Bittencourt, Marcelo Imbroinise; Benchimol-Barbosa, Paulo Roberto; Neto, C. Costa; Bedirian, Ricardo; Barbosa, Eduardo Corrêa; Brasil, Flavia; Bonmfim, Alfredo S.; Fo, Francisco Manes Albanesi

doi:10.1016/j.cardfail.2004.06.207

Cited by 4 publications

(4 citation statements)

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“…Ponte et al [42] found that HF was significantly lower in patients with left ventricular hypertrophy. However, a Portuguese study showed no correlation was found between HRV and echocardiographic measurements in hypertrophic cardiomyopathy patients [43]. In this meta-analysis, no study compared the HRV findings and measurements of echocardiography.…”

Section: Hrv and Echocardiographic Aspectsmentioning

confidence: 84%

Heart Rate Variability and Prognosis in Hemodialysis Patients: A Meta-Analysis

et al. 2020

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Background: Heart rate variability (HRV) means the variation in time of beat-to-beat interval. Lower HRV has been shown to be related with death and cardiovascular events in previous studies. In the last few years, the number of patients with ESRD has increased steadily. Maintenance hemodialysis is the most prevalent renal replacement therapy in patients with ESRD. This study aims to investigate if decreased HRV is an independent predictor of mortality in maintenance hemodialysis patients. Methods: Pubmed/Medline, EMBASE, Ovid, the Web of Science, and the Cochrane Central Register of Controlled Trials databases were searched up to October 1, 2019, for full-text articles in English. Cohort studies reporting the association between HRV and prognosis in hemodialysis patients were selected. Data extraction was performed by 2 reviewers independently, with adjudication by a third reviewer. Extracted data included the study characteristics, HRV measurement and research outcomes. Hazard ratios (HRs) and 95% confidence interval (CI) were pooled in a random-effects model for outcomes of all-cause and cardiovascular mortality. Heterogeneity assessment, subgroup analyses, and sensitivity analysis were conducted. Results: A total of 7 studies were eligible. HRV metrics consist of SDNN, SDANN, RMSSD, pNN50, HRVTI, ULF, VLF, LF, HF, LF/HF ratio, HRT, DC, and scaling exponents α1 and α2. Decreased HRV was associated with higher all-cause mortality (HR: 1.63, 95% CI: 1.11–2.39, p = 0.014) and cardiovascular mortality (HR: 1.07, 95% CI: 1.00–1.15, p = 0.045). Among the different HRV metrics, decreased SDANN (p < 0.001) and decreased LF/HF ratio (p = 0.001) were identified as predictors of all-cause death. Decreased SDNN, SDANN, and LF/HF ratio were identified as predictors of cardiovascular death (p = 0.004, p = 0.001, and p = 0.002). Conclusions: Decreased HRV is associated with higher risk of all-cause and cardiovascular death in the hemodialysis population. Decreased SDANN and LF/HF were identified as predictors of both all-cause and cardiovascular mortality, while the utility of other HRV metrics requires further investigation. The protocol for this study was registered with PROSPERO (CRD42019141886).

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Section: Hrv and Echocardiographic Aspectsmentioning

confidence: 84%

Heart Rate Variability and Prognosis in Hemodialysis Patients: A Meta-Analysis

et al. 2020

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“…The method was validated for reproducibility in the same publication 31 and has been used in other studies. 32,33 After 5 min of rest, the patients underwent the respiratory sinus arrhythmia (RSA) manoeuvre, with a controlled respiratory rate of 12 incursions per min (over 2 min), to provoke a vagal response. 34,35 They remained supine until 20th min, when the bed was tilted to 70 degrees, and a sympathetic response was expected.…”

Section: Methodsmentioning

confidence: 99%

Altered cardiovascular vagal responses in nonelderly female patients with subclinical hyperthyroidism and no apparent cardiovascular disease

Portella

Pedrosa

Coeli

et al. 2007

Clinical Endocrinology

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“…The autonomic nervous system physiologically adjusts normal inter-beat variation (or RRV) as a consequence of competitive interaction of the parasympathetic and sympathetic stimulation on the sinus node, known as cardiac autonomic modulation (24,28,29). Thus, quantification of RRV can be regarded as a measurement of the autonomicmediated cardiovascular homeostasis, a marker of cardiovascular prognosis (24,26,27).…”

Section: Discussionmentioning

confidence: 99%

Circadian cardiac autonomic function in perinatally HIV-infected preschool children

Benchimol-Barbosa

2009

Braz J Med Biol Res

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The 24-h heart rate variability and QT-interval adaptation was investigated in perinatally HIV-infected preschool children classified according to immunological status in order to assess autonomic function at early stages of infection. Thirty-five perinatally HIV-infected and clinically stable children (4.8 ± 0.3 years) were enrolled after approval of the study by the University Hospital Pedro Ernesto Ethics Committee and written informed parental consent was obtained. The children were classified according to peripheral CD4+ count (cells/µL) as follows: group 1, N = 11 (≥1000); group 2, N = 7 (≥500 and <1000); group 3, N = 17 (<500). Left ventricular ejection fraction (>55%), 24-h RR interval variability (RRV) indexes (NN, SDANN, SDNN index, r-MSSD) and 24-h QT and Bazett-corrected QT (QTc) were determined, and groups were matched for age, body surface area, and left ventricular ejection fraction, reducing biases in RRV. The peak differences (∆) between the highest and lowest RRV and QT indexes were extracted from nocturnal (1 am-6 am) and daytime (1 pm-6 pm) hourly assessed segments, respectively. Pearson’s correlation (r) and Kruskal-Wallis ANOVA were used to compare groups. CD4+ count correlated positively with ∆NN (r = 0.45; P = 0.003). There were no significant differences in daytime NN among groups. Nighttime SDNN index (P = 0.01), nighttime r-MSSD (P = 0.003), ∆NN (P = 0.01), ∆SDNN index (P = 0.03) and ∆r-MSSD (P = 0.004) were significantly lower in group 3 than in the other groups. Expected nighttime QTc-interval lengthening was not observed in all groups. In perinatally HIV-infected preschool children with preserved left ventricular systolic function, parasympathetic-mediated autonomic dysfunction parallels immune status, impairing both RRV and circadian QTc interval adaptation

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Assessment of autonomic function in septal hypertrophic cardiomyopathy

Cited by 4 publications

References 0 publications

Heart Rate Variability and Prognosis in Hemodialysis Patients: A Meta-Analysis

Heart Rate Variability and Prognosis in Hemodialysis Patients: A Meta-Analysis

Altered cardiovascular vagal responses in nonelderly female patients with subclinical hyperthyroidism and no apparent cardiovascular disease

Circadian cardiac autonomic function in perinatally HIV-infected preschool children

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