title: Chest wall regional volume in heart failure patients during inspiratory loaded breathing.
abstract: 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.
authors.affiliation: Department of Health Sciences, Federal University of Pernambuco, Recife, Pernambuco, Brazil. daniellacunha@hotmail.com
authors.forename: Daniella Cunha
authors.initials: DC
authors.lastname: Brandão
authors.forename: Susan Martins
authors.initials: SM
authors.lastname: Lage
authors.forename: Raquel Rodrigues
authors.initials: RR
authors.lastname: Britto
authors.forename: Verônica Franco
authors.initials: VF
authors.lastname: Parreira
authors.forename: Wilson Alves
authors.initials: WA
authors.lastname: de Oliveira
authors.forename: Sílvia Marinho
authors.initials: SM
authors.lastname: Martins
authors.forename: Andrea
authors.initials: A
authors.lastname: Aliverti
authors.forename: Larissa
authors.initials: L
authors.lastname: de Andrade Carvalho
authors.forename: Jasiel Frutuoso
authors.initials: JF
authors.lastname: do Nascimento Junior
authors.forename: Luciana
authors.initials: L
authors.lastname: Alcoforado
authors.forename: Inês
authors.initials: I
authors.lastname: Remígio
authors.forename: Armele Dornelas
authors.initials: AD
authors.lastname: de Andrade
mesh_terms: D000328:Adult; D000368:Aged; D006332:Cardiomegaly / Q000473:pathology; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D004417:Dyspnea / Q000503:physiopathology; D005260:Female; D005652:Functional Residual Capacity / Q000502:physiology; D006333:Heart Failure / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D053580:Muscle Strength / Q000502:physiology; D010991:Plethysmography; D012129:Respiratory Function Tests; D015656:Respiratory Mechanics / Q000502:physiology*; D012132:Respiratory Muscles / Q000502:physiology; D035441:Thoracic Wall / Q000473:pathology*; D014797:Vital Capacity / Q000502:physiology; D055815:Young Adult