Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Higher systemic arterial compliance is associated with greater exercise time and lower blood pressure in a young older population
Autore:
Cameron, JD; Rajkumar, C; Kingwell, BA; Jennings, GL; Dart, AM;
Indirizzi:
La Trobe Univ, Dept Biomed Engn, Melbourne, Vic, Australia La Trobe Univ Melbourne Vic Australia ed Engn, Melbourne, Vic, Australia Baker Med Res Inst, Melbourne, Vic, Australia Baker Med Res Inst Melbourne Vic Australia st, Melbourne, Vic, Australia
Titolo Testata:
JOURNAL OF THE AMERICAN GERIATRICS SOCIETY
fascicolo: 6, volume: 47, anno: 1999,
pagine: 653 - 656
SICI:
0002-8614(199906)47:6<653:HSACIA>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
AORTIC COMPLIANCE; AGE; DYSFUNCTION; CIRCULATION; VALIDATION; STIFFNESS; HEALTHY; THERAPY; WOMEN;
Keywords:
systemic arterial compliance; older people; exercise capacity; myocardial performance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Clinical Medicine
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Cameron, JD La Trobe Univ, Dept Elect Engn, Plenty Rd, Bundoora, Vic 3083,Australia La Trobe Univ Plenty Rd Bundoora Vic Australia 3083 Australia
Citazione:
J.D. Cameron et al., "Higher systemic arterial compliance is associated with greater exercise time and lower blood pressure in a young older population", J AM GER SO, 47(6), 1999, pp. 653-656

Abstract

OBJECTIVES: Arterial compliance is an important therapeutic target in older individuals in whom stiffening of the proximal arterial circulation is thought to underlie systolic hypertension and increased cardiac work. We haveshown previously that arterial compliance is related to aerobic fitness and that it is increased in young (20 to 35 years old), previously sedentary individuals by a 4-week period of moderate aerobic training. The extent to which compliance re lates to exercise performance in a random selection of young older patients has not been reported previously. Therefore, we examined the interrelationship between systemic arterial compliance (SAC) and time to cessation of exercise during a standard treadmill exercise test in an older population. DESIGN: A cross-sectional survey. METHODS: SAC was estimated at rest using simultaneous recordings of ascending aortic flow and carotid applanation tonometry in 43 subjects aged 67 +/- 7 years (mean +/- SD; 24 men and 19 women). Treadmill exercise testing was performed using a modified Bruce protocol. Aerobic capacity was assessed as Heart Rate-Blood Pressure product and exercise tolerance as total treadmill time. RESULTS: SAC and exercise tolerance were related to gender, with men exhibiting greater exercise reserve and higher SAC than women. There was a significant positive correlation between SAC and time to cessation of exercise (r = .34; P = .03), with a negative correlation between SAC and resting heart rate-blood pressure product (r = -.66; P <.001). SAC was correlated with height and blood pressure. Exercise tolerance was related to height (P <.02). CONCLUSIONS: These data indicate a positive association between SAC and fitness level in healthy older people and an inverse association between SAC and systolic blood pressure. Our findings are consistent with either (1) acquisition of a more compliant circulation and lower blood pressure through more physical activity or (2) that a more compliant arterial circulation and lower blood pressure permit greater athletic performance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 02:11:36