Existe um comportamento circadiano da isquemia miocárdica ao longo de 48 horas em pacientes com angina instável? / Does a circadian variation occur in myocardial ischemia over 48 hours in patients with unstable angina?
Arq. bras. cardiol
;
75(1): 9-18, jul. 2000. tab, graf
Artigo
em Português, Inglês
| LILACS
| ID: lil-269908
ABSTRACT
OBJECTIVE:
To study the incidence of and variation in myocardial ischemia over 48 hours in patients with unstable angina.METHODS:
Thirty-nine patients with unstable angina underwent long-term electrocardiography for 48 hours. The number of events and the period of time of ischemia (in minutes) were analyzed for the 48 hours, in two periods of 24 hours, and in periods of 4 hours.RESULTS:
We analyzed 1755.8 hours of monitoring tapes, and ischemic episodes were detected in 18 (46.2 percent) patients, corresponding to 173 ischemic episodes, allowing the evaluation of 1304 minutes of ischemia.only 4 of which were (2.2 percent) symptomatic, Considering the entire period of time of recording and the predetermined time intervals, we observed a higher number of ischemic episodes (38) and a longer duration of ischemia (315.4 minutes) between 1100 am and 300 pm. However, no significant differences occurred among the values in the different intervals.CONCLUSION:
Long-term electrocardiography over 48 hours showed a high incidence (97.8 percent) of silent ischemic episodes in patients with unstable angina. No evidence of a circadian variation of myocardial ischemia in unstable angina was observed
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Ritmo Circadiano
/
Isquemia Miocárdica
/
Angina Instável
Tipo de estudo:
Estudo de incidência
/
Estudo prognóstico
Limite:
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
/
Português
Revista:
Arq. bras. cardiol
Assunto da revista:
Cardiologia
Ano de publicação:
2000
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade de Sao Paulo/BR
/
Universidade de Säo Paulo/BR
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