Subclinical vascular, hemodynamic and arterial stiffness changes in adults with cystic fibrosis: cross-sectional observational study.

Cardiovascular diseases can be an emerging complication in cystic fibrosis (CF), as the median life expectancy has improved considerably. The objective of this study was to compare vascular, hemodynamic parameters and arterial stiffness in adult CF patients with healthy participants pared by sex and age, and to assess the factors associated with arterial stiffness in the CF group. This is a cross-sectional observational study. The evaluation of cardiovascular parameters was performed non-invasively using Mobil-O-Graph. 36 individuals with CF and 35 controls were evaluated. The mean arterial pressure (96.71 ± 10.98 versus 88.61 ± 7.40 mmHg, p = 0.0005), cardiac output (4.86 ± 0.57 versus 4.48 ± 0.44 L/min, p = 0.002) and systolic volume (64.30 ± 11.91 versus 49.02 ± 9.31 ml, p < 0.0001) were significantly lower in the CF group. The heart rate was higher in the CF when compared to the control (77.18 ± 10.47 versus 93.56 ± 14.57 bpm, p < 0.0001). The augmentation index (AIx@75) was higher in the CF than control (29.94 ± 9.37 versus 16.52 ± 7.179%, p < 0.0001). In the multivariate model controlled by body mass index and Forced Expiratory Volume in the first second, central systolic blood pressure and reflection coefficient directly related to AIx@75. Negatively related to AIx@75 were age and systolic volume. The adjusted determination coefficient was 87.40%. Individuals with CF presented lower arterial blood pressures and changes in cardiac function with lower stroke volume and cardiac output. The AIx@75, an indirect index of arterial stiffness and direct index of left ventricular overload, is increased in this population. The subclinical findings suggest the need for earlier cardiovascular assessment in this population due to increased risks of cardiovascular disease.

Qualidade de vida e índices de rigidez arterial em pacientes com isquemia crônica ameaçadora ao membro / Quality of life and arterial stiffness indices in patients with chronic limb-threatening ischemia

Introdução: Os fatores associados ao comprometimento da qualidade de vida em pacientes com isquemia crônica ameaçadora ao membro não estão bem estabelecidos. Objetivo: Verificar se existe associação entre a qualidade de vida e os índices de rigidez arterial, velocidade de onda de pulso (VOP) e o índice de aumentação normalizado para a frequência cardíaca de 75 bpm (AIx@75). Métodos: Trata-se de um estudo transversal, observacional, com a participação de 17 pacientes (65,65 ±11,79 anos) com isquemia crônica ameaçadora ao membro definida pela classificação de Rutherford 4, 5 e 6, e com o índice tornozelo-braço (ITB) < 0,80. A avaliação dos parâmetros vasculares e os índices de rigidez arterial foram realizadas com o aparelho Mobil-O-Graph ® que gera a onda de pulso aórtica a partir da oscilometria da artéria braquial. A qualidade de vida foi avaliada pelo questionário Vascular quality of life questionaire (VascuQoL-6), versão curta, desenvolvido especificamente para avaliar pacientes com comprometimento circulatório, arterial ou venoso. Resultados: Os valores do ITB e do escore de qualidade de vida foram 0,48 ± 0,14 e 15,88 ± 1,03; respectivamente. Dos 17 pacientes, 12 apresentavam hipertensão arterial sistólica e dezesseis apresentaram a VOP maior que 10 m/s. Não foram observadas correlações entre o escore de qualidade de vida com o AIx@75 (p=0,54 e r=0,16), a VOP (p=0,332 e r=0,248) e o ITB (p=0,707 e r=0,098). Conclusão: O presente estudo demonstrou que pacientes com isquemia crônica ameaçadora ao membro apresentam comprometimento importante da qualidade de vida sem associação com os índices de rigidez arterial e ITB.

Introduction: The factors associated with impaired quality of life in patients with chronic limb-threatening ischemia are not well established. Objective: Check whether there is an association between quality of life and arterial stiffness indexes, pulse wave velocity (PWV) and the augmentation index corrected to 75 beats per minute heart rate (AIx@75). Methods: This is a cross-sectional, observational study, with the participation of 17 patients (65.65 ± 11.79 years) with chronic limb-threatening ischemia defined by the Rutherford classification 4, 5 and 6, and with the ankle-arm index (ABI) < 0.80. The evaluation of vascular parameters and arterial stiffness indeces was performed with the MobilO-Graph ® device that generates the aortic pulse wave from the brachial artery oscillometry. Quality of life was assessed using the questionnaire Vascular quality of life questionaire (VascuQoL-6), short version, developed specifically to evaluate patients with circulatory, arterial or venous involvement. Results: The values of the ITB and the quality of life score were 0.48 ± 0.14 and 15.88 ± 1.03; respectively. Of the 17 patients, 12 had systolic arterial hypertension and sixteen had PWV greater than 10 m / s. No correlations were observed between the quality of life score with AIx @ 75 (p = 0.54 and r = 0.16), PWV (p = 0.332 and r = 0.248) and ABI (p = 0.707 and r = 0.098). Conclusion: The present study demonstrated that patients with chronic limb-threatening ischemia present significant impairment of quality of life without association with arterial stiffness and ABI.