Respiratory physiology & neurobiology · 2011
Chest wall regional volume in heart failure patients during inspiratory loaded breathing.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Brandão Daniella Cunha, Lage Susan Martins, Britto Raquel Rodrigues, Parreira Verônica Franco, de Oliveira Wilson Alves, Martins Sílvia Marinho, Aliverti Andrea, de Andrade Carvalho Larissa, do Nascimento Junior Jasiel Frutuoso, Alcoforado Luciana, Remígio Inês, de Andrade Armele Dornelas
Аннотация
Were evaluated individuals divided into two groups: we studied chronic heart failure (CHF) (19 patients with CHF plus cardiomegaly) and control (12 healthy volunteers) during performance of inspiratory loaded breathing (ILB). We evaluated: spirometry, functional capacity through the six-minute walk test (6MWT), and distribution of thoracoabdominal volumes via optoelectronic plethysmography (OEP), namely volume variations of pulmonary rib cage (Vrc,p), abdominal rib cage (Vrc,a), and abdomen (Vab). In each compartment, the percentage contributions of right and left sides were also calculated. During ILB, patients with heart failure were characterized by a significant reduction of the Vrc,a volume variations compared to the control group. Correlations were found between left %Vrc,a on the left side measured during ILB and left ventricular ejection fraction (r=0.468; p=0.049), and dyspnea after the 6MWT (r=-0.878; p<0.01).Then, patients with CHF and cardiomegaly are characterized by a reduced mobility in left part of the lower part of the rib cage, that contributes leading to increased perception of dyspnea during submaximal exercise.