RESUMO
This paper presents the development of an expert system in urological area to support the detection of prostate cancer...
Assuntos
Processamento Eletrônico de Dados , Sistemas de Informação , Neoplasias da Próstata/diagnósticoRESUMO
The influence of changes in the KCl concentration of the bath fluid ([KCl]o) on the corrected sinus node recovery time (CSNRT) was studied using the continuous pacing method (M1) and the method of stimulation with premature pulses (M2). M1 and M2 were compared in Krebs-Henseleit solution containing normal (4.6 mM), low (3.1mM, LoKCl) and hight (6.1 mM, HiKCl) [KCl]o. The results revealed that HiKCl increased CSNRT (P < 0.01) and changed the prematurit-CSNRT relationship (P<0.01), whereas LoKCL did not change CSNRT. M1 and M2 were different (P<0.01) regardless of [KCl]o, except for pacing intervals near the spontaneous cycle length
Assuntos
Cloreto de Potássio/farmacologia , Técnicas In Vitro , Nó SinoatrialRESUMO
The effects of pacing frequency, overdrive duration and stimulus amplitude on the sinus node recovery time (SNRT) were studied in the isolated right atrium of the rat. a positive relationship between pacing frequency and the SNRT was observed, whereas overdrive duration ans stimulus amplitude did not affect SNRT. There was no significant interaction among the factors studied. The effect of frequency upon SNRT probably does not involve neurotransmitter release due to stimulation, since in vitro pretreatment with atropine plus propranolol does change the SNRT - frequency relation