Revista Portuguesa de Cardiologia (Feb 2017)

The relationship between 24-hour ambulatory blood pressure load and neutrophil-to-lymphocyte ratio

  • Tolga Çimen,
  • Hamza Sunman,
  • Tolga Han Efe,
  • Mehmet Erat,
  • Haluk Furkan Şahan,
  • Engin Algül,
  • İlkin Guliyev,
  • Ahmet Akyel,
  • Mehmet Doğan,
  • Sadık Açıkel,
  • Ekrem Yeter

Journal volume & issue
Vol. 36, no. 2
pp. 97 – 105

Abstract

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Introduction and Objective: The neutrophil-to-lymphocyte ratio (NLR) is established as a reliable marker of systemic inflammation. Low-grade inflammation has a key role in the pathogenesis and progression of hypertension (HTN). Blood pressure (BP) load, defined as the percentage of abnormally elevated BP readings, is a good marker of HTN severity. We aimed to evaluate the relationship between HTN severity and NLR using averaged ambulatory BP readings and BP load. Methods: A total of 300 patients with untreated essential HTN were included in this cross-sectional study. Patients were divided into quartiles according to NLR values (first: 2.48). Averaged ambulatory BP values and BP load were assessed for each quartile. Results: In the interquartile evaluation there were no differences between quartiles in terms of baseline demographic, clinical and echocardiographic characteristics (p>0.05). Daytime systolic BP (SBP), 24-hour diastolic BP (DBP), daytime DBP, daytime SBP load, 24-hour DBP load and daytime DBP load were found to be significantly higher in the upper two quartiles (p 2,48). Os valores médios da PA em ambulatório e a carga da PA foram avaliados para cada quartil. Resultados: Na avaliação interquartis, não houve diferença entre quartis nas características demográficas, clínicas e ecocardiográficas basais (p > 0,05). A PA sistólica diurna (PAS), a PA diastólica (PAD) a 24 horas, a PAD diurna, a carga da PAS diurna, a PAD a 24 horas e a PAD diurna foram significativamente mais elevadas nos dois quartis superiores (p < 0,05 para todos). Na análise de correlação, os valores do logaritmo de RNL foram positivamente correlacionados com a PAS a 24 horas, com a PAD, com a PAS carga e com a PAD carga (coeficientes de Pearson de 0,194, 0,197, 0,157 e 0,181, respetivamente; p<0,01 para todos). Na análise multivariada, os valores do logaritmo da RNL mostraram uma associação independente com a PAS-PAD a 24 horas e com a carga da PAS-PAD a 24 horas. Conclusão: Este estudo mostrou pela primeira vez que o aumento da RNL está independentemente associado à gravidade da PA nos doentes com HT essencial não tratada. Keywords: Ambulatory blood pressure, Neutrophil-to-lymphocyte ratio, Hypertension, Inflammation, Palavras-chave: Pressão arterial em ambulatório, Proporção neutrófilos/linfócitos, Hipertensão, Inflamação