VO2 pico e inclinação VE/VCO2 na era dos betabloqueadores na insuficiência cardíaca: uma experiência brasileira

Guimarães, Guilherme Veiga; Silva, Mário Sérgio Vaz da; d’Avila, Veridiana Moraes; Ferreira, Sílvia Moreira Ayub; Silva, Christiano Pereira; Bocchi, Edimar Alcides

doi:10.1590/s0066-782x2008001300007

Cited by 18 publications

(7 citation statements)

References 31 publications

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“…Another reference predicts that individuals with VO 2 peak inferior to 10 ml.kg -1 .min -1 indicates an important predictor of cardiac events, and higher than 16 ml.kg -1 .min -1 indicates greater survival chances in these patients. Guimarães et al (2008) evaluated 391 subjects with heart failure, 229 of whom used beta-blockers and 162 who did not use. The Naughton protocol was used to evaluate VO 2 peak.…”

Section: Discussionmentioning

confidence: 99%

Untitled

2019

JPES

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The aims of the present study were to measure maximal cycle ergometry cardiorespiratory responses of individuals participating in a cardiac rehabilitation program and to investigate the relation between oxygen uptake (VO 2 ) and heart rate (HR) at ventilatory thresholds (VT1 and VT2). Forty-seven sedentary subjects (age: 65.8 ± 9.9 years; BMI: 28.24 ± 4.01 kg/m 2 ), who entered in a cardiac rehabilitation program, performed a maximal cycle ergometry test. The test was performed on a cycle ergometer with a continuous incremental protocol, with a cadence of 60 rpm. The load increased every minute until exhaustion. The expired gases were continuously measured by Aerosport VO 2000 analyzer. The VO 2 mean values were 12.54 ± 3.52 ml.kg -1 . min -1 at VT1 and 14.16 ± 3.58 ml.kg -1 . min -1 at VT2 (VO 2 peak = 14.20 ± 3.5 ml.kg -1 . min -1 ). The HR at VT1 was 106.5 ± 21.3 bpm, at VT2 was 113.5 ± 20.7 bpm and at maximal exertion was 115.5 ± 20.0 bpm. It was found that the relation between the three moments of the VO 2 and HR measurements and heart rate were more significant than the relationship between the variables studied (p < 0.05). We conclude that there is a relation between VO 2 and HR variables. The characterization of a behavioral profile of the investigated cardiorespiratory variables for sedentary individuals with coronary artery disease can stratify the risk to start the exercise practice for these individuals, and to indicate in what clinical and functional state these individuals were. JPES ®www.efsupit.ro 399 demand for myocardial oxygen acting as a stimulus to increase coronary blood flow and oxygen supply, thus reducing the risk of myocardial infarction and angina (Bruning & Sturek, 2015). However, there remains an obstacle in the application of these results in clinical practice. This is due, in large part, to the methodological limitations, conflicting results of the studies on this subject, and the difficulty in obtaining individuals for the tests (Nunes et al., 2017). Hence, it is important to observe some aspects in cardiopulmonary fitness tests, such as beginning with low intensity and decreasing the execution time to avoid the effects of cumulative fatigue (Nunes et al., 2016).Therefore, the objectives of the present study were to measure maximal cycle ergometry cardiorespiratory responses of individuals participating in a cardiac rehabilitation program and to investigate the relation between oxygen uptake (VO 2 ) and heart rate (HR) at different ventilatory thresholds (VT1 and VT2).

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Section: Discussionmentioning

confidence: 99%

Untitled

2019

JPES

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“…A national database of patients using beta-blockers indicated that peak VO 2 ≤ 10 ml/kg -1 /min -1 indicates an increased risk of cardiovascular events, peak VO 2 between 10 and 16 ml/kg -1 /min -1 represents a moderate risk, and peak VO 2 > 16 ml/kg -1 /min -1 indicate a lower risk. In addition, a VE/VCO 2 slope of > 34 was associated with an increased risk 44 . Patients with NIHF accounted for 68% of the sample.…”

Section: Introductionmentioning

confidence: 94%

Stratification of the Risk of Sudden Death in Nonischemic Heart Failure

Pimentel¹,

Zimerman²,

Rohde³

2014

Arquivos Brasileiros De Cardiologia

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Despite significant therapeutic advancements, heart failure remains a highly prevalent clinical condition associated with significant morbidity and mortality. In 30%-40% patients, the etiology of heart failure is nonischemic. The implantable cardioverter-defibrillator (ICD) is capable of preventing sudden death and decreasing total mortality in patients with nonischemic heart failure. However, a significant number of patients receiving ICD do not receive any kind of therapy during follow-up. Moreover, considering the situation in Brazil and several other countries, ICD cannot be implanted in all patients with nonischemic heart failure. Therefore, there is an urgent need to identify patients at an increased risk of sudden death because these would benefit more than patients at a lower risk, despite the presence of heart failure in both risk groups. In this study, the authors review the primary available methods for the stratification of the risk of sudden death in patients with nonischemic heart failure.

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“…VO 2 pico inferior a 50% do predito tem alta sensibilidade como fator de risco de morte súbita ou de descompensações recorrentes da IC. Recentes estudos demonstraram superioridade da eficácia ventilatória (VE/VCO 2 slope) em relação ao VO 2 pico no prognóstico de pacientes com IC 8,10 .…”

Section: Teste De Esforço Cardiopulmonarunclassified

II Diretriz Brasileira de Transplante Cardíaco

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2010

Arq. Bras. Cardiol.

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VO2 pico e inclinação VE/VCO2 na era dos betabloqueadores na insuficiência cardíaca: uma experiência brasileira

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Cited by 18 publications

References 31 publications

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Stratification of the Risk of Sudden Death in Nonischemic Heart Failure

II Diretriz Brasileira de Transplante Cardíaco

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