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Titolo:
Changes in cardiac dimensions and indices of cardiac function during deconditioning in horses
Autore:
Kriz, NG; Hodgson, DR; Rose, RJ;
Indirizzi:
Univ Sydney, Dept Vet Clin Sci, Sydney, NSW 2006, Australia Univ Sydney Sydney NSW Australia 2006 in Sci, Sydney, NSW 2006, Australia
Titolo Testata:
AMERICAN JOURNAL OF VETERINARY RESEARCH
fascicolo: 12, volume: 61, anno: 2000,
pagine: 1553 - 1560
SICI:
0002-9645(200012)61:12<1553:CICDAI>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEFT-VENTRICULAR PERFORMANCE; HEART-RATE; HEALTHY-SUBJECTS; PROLONGED EXERCISE; ARTERIAL-PRESSURE; AEROBIC EXERCISE; M-MODE; ECHOCARDIOGRAPHY; PRELOAD; HYPERTROPHY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Kriz, NG European Agcy Evaluat Med Prod, 7 Westferry Circus,Canary Wharf, London E14 4HB, England European Agcy Evaluat Med Prod 7 Westferry Circus,Canary Wharf London England E14 4HB
Citazione:
N.G. Kriz et al., "Changes in cardiac dimensions and indices of cardiac function during deconditioning in horses", AM J VET RE, 61(12), 2000, pp. 1553-1560

Abstract

Objective-To investigate the effects of deconditioning on cardiac dimensions and indices of cardiac function in horses. Animals-Thirteen 3-to 4-year-old Standardbred geldings. Procedure-All horses had echocardiographic measurements performed at the conclusion of 9 months of intense training and at weeks 1.5, 4, 8, and 12 ofdeconditioning. Direct echocardiographic measurements included interventricular septal thickness, left ventricular internal dimensions, left ventricular free-wall thickness, left atrial dimension, aortic diameter, diameter of the pulmonary artery, slopes of the mitral valve, heart rate, preejectionperiod, and ejection time. Derived indices of cardiac function included fractional shortening, fractional area change, and cardiac output. Results-Cardiac dimensions did not change significantly for the first 4 weeks of deconditioning but decreased significantly by week 8 and continued to decrease until week 12. Indices of cardiac function increased significantly during the first 10 days of deconditioning, remaining stable until week 4 of deconditioning. After week 4, indices of cardiac function decreased significantly until week 12. Conclusions and Clinical Relevance-Deconditioning resulted in a general reduction in cardiac dimensions and indices of cardiac function over 12 weeks. However, results of the study reported here indicate that following an intense period of training, cardiac function may be maintained during the first 4 weeks of deconditioning. Results indicate that trained horses may restfor up to 4 weeks without a substantial reduction in cardiac capacity as reflected by echocardiographic indices.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 05:08:32