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Pulmonary function, cholinergic bronchomotor tone, and cardiac autonomic abnormalities in type 2 diabetic patients
Melo, E; Vianna, E. O; Gallo Júnior, L; Foss, M. C; Terra-Filho, J.
  • Melo, E; Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica. Ribeirão Preto. BR
  • Vianna, E. O; Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica. Ribeirão Preto. BR
  • Gallo Júnior, L; Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica. Ribeirão Preto. BR
  • Foss, M. C; Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica. Ribeirão Preto. BR
  • Terra-Filho, J; Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica. Ribeirão Preto. BR
Braz. j. med. biol. res ; 36(3): 291-299, Mar. 2003. tab, graf
Article in English | LILACS | ID: lil-329457
ABSTRACT
This prospective study analyzed the involvement of the autonomic nervous system in pulmonary and cardiac function by evaluating cardiovascular reflex and its correlation with pulmonary function abnormalities of type 2 diabetic patients. Diabetic patients (N = 17) and healthy subjects (N = 17) were evaluated by 1) pulmonary function tests including spirometry, He-dilution method, N2 washout test, and specific airway conductance (SGaw) determined by plethysmography before and after aerosol administration of atropine sulfate, and 2) autonomic cardiovascular activity by the passive tilting test and the magnitude of respiratory sinus arrhythmia (RSA). Basal heart rate was higher in the diabetic group (87.8 ± 11.2 bpm; mean ± SD) than in the control group (72.9 ± 7.8 bpm, P<0.05). The increase of heart rate at 5 s of tilting was 11.8 ± 6.5 bpm in diabetic patients and 17.6 ± 6.2 bpm in the control group (P<0.05). Systemic arterial pressure and RSA analysis did not reveal significant differences between groups. Diabetes intragroup analysis revealed two behaviors: 10 patients with close to normal findings and 7 with significant abnormalities in terms of RSA, with the latter subgroup presenting one or more abnormalities in other tests and clear evidence of cardiovascular autonomic dysfunction. End-expiratory flows were significantly lower in diabetic patients than in the control group (P<0.05). Pulmonary function tests before and after atropine administration demonstrated comparable responses by both groups. Type 2 diabetic patients have cardiac autonomic dysfunction that is not associated with bronchomotor tone alterations, probably reflecting a less severe impairment than that of type 1 diabetes mellitus. Yet, a reduction of end-expiratory flow was detected
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Full text: Available Index: LILACS (Americas) Main subject: Autonomic Nervous System / Diabetes Mellitus, Type 2 / Heart Diseases Type of study: Observational study / Risk factors Limits: Adult / Female / Humans / Male Language: English Journal: Braz. j. med. biol. res Journal subject: Biology / Medicine Year: 2003 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Autonomic Nervous System / Diabetes Mellitus, Type 2 / Heart Diseases Type of study: Observational study / Risk factors Limits: Adult / Female / Humans / Male Language: English Journal: Braz. j. med. biol. res Journal subject: Biology / Medicine Year: 2003 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR