Registro de 24 horas da pressão arterial em tabagistas e não-tabagistas

Abstract

objective:To evaluate the effect of smoking on blood pressure trends during a 24-hour period, by analyzing the parameters of the ambulatory blood pressure monitoring (ABPM). Methods:The results of 289 ABPM tests conducted on patients classified as smokers or nonsmokers were studied. The parameters analyzed were: mean 24-hour, daytime and nighttime systolic and diastolic blood pressure readings; nocturnal dipping of systolic and diastolic pressures and blood pressure load. The patients were classified in four groups according to whether or not they used antihypertensive medication: 1A -nonsmokers using medication; 1B -smokers using medication; 2A -nonsmokers not using medication; and 2B -smokers not using medication. Variables were expressed as minimum, maximum, median, mean and standard deviation values. Univariate analysis was used for comparing the smoking and nonsmoking groups. The significantly different variables from the groups were selected using multivariate analysis. The significance level adopted was 5%.results: Mean daytime systolic and diastolic blood pressures were significantly higher in the smokers, regardless of whether or not they used antihypertensive medication. Mean nocturnal blood pressure readings were similar between smokers and nonsmokers. Mean 24-hour systolic blood pressure readings were significantly higher in the smokers, regardless of whether or not they used antihypertensive medication. Nocturnal dipping was similar for all groups. Blood pressure loads were consistently and significantly higher in the smokers regardless of medication use.conclusion: Mean daytime systolic and diastolic blood pressure readings were consistently higher in the smokers when compared to nonsmokers regardless of antihypertension medication use. Nocturnal dipping was similar for smokers and nonsmokers.

Variabilidad De La Presión Arterial, Hipertensión Arterial Nocturna Y Su Asociación Con Tabaquismo

“…La relación entre tabaquismo e HTA es controversial. Algunos estudios hallaron una asociación positiva, con mayor incidencia de HTA tanto en hombres (34) como en mujeres tabaquistas (35) con una media de PA sistólica y diastólica significativamente mayor en los pacientes fumadores, independientemente del uso de medicación antihipertensiva (36) . Además se ha observado una PA diurna mayor en los días en que se consume tabaco, comparado a los días que no se consume (37) .…”

Efeitos do treinamento muscular inspiratório em universitários tabagistas e não tabagistas

“…Isso provavelmente se deve ao fato de que o tabagismo gera um efeito constritor em alguns vasos sanguíneos, aumentando a liberação de catecolaminas, produzidas pela nicotina, que causam um aumento da PA e da FC em indivíduos tabagistas 6 . Outro estudo 24 ainda mostrou que tabagistas tendem a apresentar médias pressóricas maiores que os não tabagistas, comprovando o efeito do fumo sobre a função cardiovascular.…”

MAPA em portadores de DPOC com dessaturação no sono

“…All had been smokers 12 and were receiving inhaled beta 2-adrenergic receptor agonists, selective for these receptors, with direct delivery at the site of action in the airways; these features provide a reduction of extrapulmonary side effects, particularly of cardiac effects, and thus blood pressure readings were less likely to be influenced. In the control group, with 14 patients, six (42%) were males with no history of smoking.…”

“…In addition to showing scarce and conflicting data on blood pressure in patients with COPD, the literature also points out the need for further studies to explain the behavior of blood pressure during sleep desaturation and, most importantly, its effects on target organs. Ambulatory blood pressure monitoring (ABPM) is the diagnostic tool that provides this analysis, thus permitting the knowledge of the pattern of blood pressure variations during wakefulness and sleep 11,12 .…”