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. 2017 Sep;109(3):191-198.
doi: 10.5935/abc.20170103. Epub 2017 Jul 20.

Relationship between Cardiometabolic Parameters and Elevated Resting and Effort Heart Rate in Schoolchildren

[Article in English, Portuguese]
Cristiane Fernanda da Silva  1 , Miria Suzana Burgos  1 , Priscila Tatiana da Silva  1 , Leandro Tibiriçá Burgos  1 , Letícia Welser  1 , Ana Paula Sehn  1 , Jorge André Horta  1 , Elza Daniel de Mello  2 , Cézane Priscila Reuter  1
Affiliations

Relationship between Cardiometabolic Parameters and Elevated Resting and Effort Heart Rate in Schoolchildren

[Article in English, Portuguese]
Cristiane Fernanda da Silva et al. Arq Bras Cardiol. 2017 Sep.

Abstract
in English, Portuguese

Background: Little has been studied on heart rate and its relationship with metabolic disorders.

Objective: To identify possible association between heart rate (HR) and metabolic disorders in children and adolescents.

Methods: This cross-sectional study evaluated 2.098 subjects, aged between 7 and 17 years. The variables evaluated were: HR, systolic (SBP) and diastolic blood pressure (DBP), pulse pressure (PP), double-product (DP), myocardial oxygen consumption (mVO2), lipids, glucose and uric acid levels, body mass index (BMI) and waist circumference (WC). The values of HR at rest and effort were divided into quartiles. The association between continuous values of HR and cardiometabolic indicators was tested by linear regression.

Results: LDL cholesterol presented a significantly higher mean (p = 0.003) in schoolchildren with resting HR greater or equal to 91 bpm, compared to students with less than 75 bpm. Compared with the quartiles of effort HR, SBP, DBP, glucose and uric acid presented high values when HR was greater or equal than 185 bpm. SBP, glucose and HDL cholesterol demonstrated a significant association with resting HR. Uric acid was observed as a predictor of increased effort HR.

Conclusion: Schoolchildren with a higher resting HR have higher mean of LDL cholesterol. For effort HR, there was an increase in blood pressure, glucose and uric acid levels. Uric acid has been shown to be a predictor of elevated effort HR.

Fundamento: Pouco se tem estudado sobre frequência cardíaca e suas relações com alterações metabólicas.

Objetivo: Verificar se existe associação entre frequência cardíaca e disfunções metabólicas em crianças e adolescentes.

Método: Estudo transversal com 2.098 escolares, com idade entre 7 e 17 anos. As variáveis avaliadas foram: frequência cardíaca (FC), pressão arterial sistólica (PAS), diastólica (PAD) e de pulso (PP), duplo-produto (DP), consumo de oxigênio pelo miocárdio (mVO2), perfil lipídico e glicêmico, níveis de ácido úrico, índice de massa corporal (IMC) e circunferência da cintura (CC). Os valores de FC de repouso e esforço foram divididos em quartis. A associação entre os valores contínuos de FC com indicadores cardiometabólicos foi testada por meio da regressão linear.

Resultdos: O colesterol LDL apresentou média significativamente superior (p = 0,003) nos escolares com FC de repouso maior ou igual a 91 bpm, em comparação aos escolares que apresentaram menos de 75 bpm. Comparados com os quartis da FC de esforço, a PAS, PAD, glicose e ácido úrico apresentaram valores elevados quando a FC foi igual ou superior a 185 bpm. A PAS, a glicose e o colesterol HDL demonstraram associação significativa com a FC de repouso. Observou-se o ácido úrico como um preditor do aumento da FC de esforço.

Conclusão: Escolares com FC de repouso mais elevada apresentam médias superiores de colesterol LDL. Para FC de esforço, observou-se elevação na pressão arterial, nos níveis de glicose e de ácido úrico. O ácido úrico demonstrou ser preditor da elevação da FC de esforço.

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Potential Conflict of Interest

No potential conflict of interest relevant to this article was reported.

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