Normotensos com resposta pressórica exagerada ao exercício possuem tônus vagal cardíaco aumentado

Ramos, Plínio dos Santos; Araújo, Cláudio Gil Soares de

doi:10.1590/s0066-782x2010005000078

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…The CPX's maximal nature was subjectively defined by the well-trained physician who supervised the procedure and supported by physiological indicators, such as the occurrence of anaerobic threshold (AT) [23], a U pattern of the ventilatory equivalent curves - and by – a score of 10 on the 0–10 Borg scale. The CPXs of patients who did not simultaneously achieve all of these criteria were considered submaximal [24], [25]. Throughout CPX, electrocardiogram, heart rate, blood pressure and arterial oxygen saturation were also obtained.…”

Section: Methodsmentioning

confidence: 99%

Cardiorespiratory Optimal Point: A Submaximal Exercise Variable to Assess Panic Disorder Patients

Ramos¹,

Sardinha

Nardi

et al. 2014

PLoS ONE

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Panic disorder (PD) patients often report respiratory symptoms and tend to perform poorly during maximal cardiopulmonary exercise testing (CPX), at least partially, due to phobic anxiety. Thus, we hypothesized that a submaximal exercise variable, minimum VE/VO2 - hereafter named cardiorespiratory optimal point (COP) -, may be useful in their clinical assessment. Data from 2,338 subjects were retrospectively analyzed and 52 (2.2%) patients diagnosed with PD (PDG) (70% women; aged 48±13 years). PD patients were compared with a healthy control group (CG) precisely matched to number of cases, age and gender profiles. PDG was further divided into two subgroups, based on having achieved a maximal or a submaximal CPX (unwilling to continue until exhaustion). We compared COP, VO2 max, maximum heart rate (HR max) between PDG and CG, and also COP between maximal and submaximal PD subgroups. COP was similar between PDG and CG (21.9±0.5 vs. 23.4±0.6; p = 0.07), as well as, for PD subgroups of maximal and submaximal CPX (22.0±0.5 vs. 21.6±1.3; p = 0.746). Additionally, PD patients completing a maximal CPX obtained VO2 max (mL.kg−1.min−1) (32.9±1.57 vs 29.6±1.48; p = 0.145) and HR max (bpm) similar to controls (173±2.0 vs 168±2.7; p = 0.178). No adverse complications occurred during CPX. Although clinically safe, it is sometimes difficult to obtain a true maximal CPX in PD patients. Normalcy of cardiorespiratory interaction at submaximal effort as assessed by COP may contribute to reassure both patients and physicians that there is no physiological substrate for exercise-related respiratory symptoms often reported by PD patients.

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Section: Methodsmentioning

confidence: 99%

Cardiorespiratory Optimal Point: A Submaximal Exercise Variable to Assess Panic Disorder Patients

Ramos¹,

Sardinha

Nardi

et al. 2014

PLoS ONE

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“…Araujo et al (Araujo 1985) compared T4S and deep breathing tests and concluded that T4S appeared to be more specific for assessing parasympathetic function than respiratory sinus arrhythmia, particularly in patients with parasympathetic impairment. Prior studies with the T4S have investigated adult populations, either healthy (Almeida et al 2004), with unfavorable anthropometric characteristics (Ramos and Araujo 2010a), or showing exaggerated blood pressure response to exercise (Ramos and Araujo 2010b). Additionally, reference values for the method have been established only for adults from 18-to 81 years (Araujo et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Four-second dynamic exercise testing (T4S) for the assessment of cardiac vagal modulation in obese adolescents

Oliveira

Brasil

et al. 2019

Physiol. Meas.

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Background: Reduced vagal activity is often present in obese adolescents. Simple and practical strategies for the assessment of isolate parasympathetic outflow in this population are therefore useful. Objectives: To compare the methods derived from heart rate variability (HRV) analysis at rest and 4 s exercise testing (T4S) for the assessment of cardiac parasympathetic modulation in adolescents classified as obese (OB) or with normal weight (NW). Additionally, associations between total and trunk fat versus autonomic modulation determined by the two methods were calculated. Approach: A cross-sectional study was conducted with 50 adolescents (26 OB and 24 NW, 14.7 ± 1.5 years), comparing autonomic indices provided by HRV and T4S. Body fractioning was determined employing dual-energy x-ray absorptiometry (DXA). Main results: The cardiac vagal index (CVI) obtained from T4S and standard time- and frequency-domain HRV measures were lower in OB versus NW (P ⩽ 0.05). Correlations between CVI and HRV indices of cardiac vagal modulation were as follows: CVI versus RMSSD (r = 0.44; P = 0.003); CVI versus pNN50 (r = 0.32; P = 0.04); CVI versus HF (r = 0.35; P = 0.02). Associations between body fat, android/gynoid ratio, and percent trunk fat versus CVI were of similar magnitude and direction than versus HRV indices. Significance: The T4S proved to be adequate to detect cardiac parasympathetic impairment in obese adolescents. Moreover, vagal modulation assessed by HRV and T4S inversely correlated with visceral adipose tissue. These findings along with the simplicity and safety of the T4S should encourage its use in the assessment of cardiac parasympathetic modulation in obese pediatric populations.

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Investigation on Cardiovascular Risk Prediction Using Physiological Parameters

Lin

Zhang

2013

Computational and Mathematical Methods in Medicine

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Cardiovascular disease (CVD) is the leading cause of death worldwide. Early prediction of CVD is urgently important for timely prevention and treatment. Incorporation or modification of new risk factors that have an additional independent prognostic value of existing prediction models is widely used for improving the performance of the prediction models. This paper is to investigate the physiological parameters that are used as risk factors for the prediction of cardiovascular events, as well as summarizing the current status on the medical devices for physiological tests and discuss the potential implications for promoting CVD prevention and treatment in the future. The results show that measures extracted from blood pressure, electrocardiogram, arterial stiffness, ankle-brachial blood pressure index (ABI), and blood glucose carry valuable information for the prediction of both long-term and near-term cardiovascular risk. However, the predictive values should be further validated by more comprehensive measures. Meanwhile, advancing unobtrusive technologies and wireless communication technologies allow on-site detection of the physiological information remotely in an out-of-hospital setting in real-time. In addition with computer modeling technologies and information fusion. It may allow for personalized, quantitative, and real-time assessment of sudden CVD events.

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Normotensos com resposta pressórica exagerada ao exercício possuem tônus vagal cardíaco aumentado

Abstract: An increased BP response during the CPET in healthy adult males is accompanied by indicators of good clinical prognosis, including higher levels of aerobic fitness and cardiac vagal tone.

Cited by 8 publications

References 25 publications

Cardiorespiratory Optimal Point: A Submaximal Exercise Variable to Assess Panic Disorder Patients

Cardiorespiratory Optimal Point: A Submaximal Exercise Variable to Assess Panic Disorder Patients

Four-second dynamic exercise testing (T4S) for the assessment of cardiac vagal modulation in obese adolescents

Investigation on Cardiovascular Risk Prediction Using Physiological Parameters

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