Immediate heart rate responses to head-up tilt in healthy human subjects: response characteristics and variability.
Indian J Physiol Pharmacol
;
1993 Oct; 37(4): 323-7
Artigo
em Inglês
| IMSEAR
| ID: sea-107985
ABSTRACT
Eight healthy adult males underwent three 70* head-up tilts within a nine day period. Immediate heart rate responses were monitored for 30 beats following completion of change to upright posture. The pooled data demonstrates a clearly demarcated bimodal heart rate response with a rise in heart rate by the 20th beat and a subsequent fall by the 30th beat. There is a secondary rise in heart rate with continuation of the tilted position. The bimodal response is at variance with several earlier reports. There is a large variability in the immediate heart rate responses, both between subjects of a homogeneous group and within subjects with repeated measurements. The large variability precludes the use of the immediate heart rate responses to passive tilting in autonomic testing.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Postura
/
Humanos
/
Masculino
/
Análise de Variância
/
Adulto
/
Cabeça
/
Frequência Cardíaca
Idioma:
Inglês
Revista:
Indian J Physiol Pharmacol
Ano de publicação:
1993
Tipo de documento:
Artigo
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