Time to positivity of a rapid bedside assay for cardiac-specific troponin T predicts prognosis in acute coronary syndromes: a Thrombolysis in Myocardial Infarction (TIMI) 11A substudy.
J Am Coll Cardiol
; 31(2): 326-30, 1998 Feb.
Article
em En
| MEDLINE
| ID: mdl-9462575
ABSTRACT
OBJECTIVES:
We sought to determine whether the rapid bedside assay for troponin T identified patients at risk for a more complicated hospital stay and a higher rate of adverse clinical events.BACKGROUND:
In patients with an acute coronary syndrome, the amount of cardiac-specific troponin T released bears a stoichiometric relation to the extent of myocardial damage.METHODS:
In 597 patients with unstable angina or non-Q wave myocardial infarction participating in the Thrombolysis in Myocardial Infarction (TIMI) 11A substudy, a rapid bedside assay and simultaneous quantitative serum measurement for troponin T were obtained at enrollment.RESULTS:
The composite end point of the sum of death, nonfatal myocardial infarction or recurrent ischemia through day 14 occurred in 33.6% of patients with a positive assay compared with only 22.5% of patients with a negative assay (p = 0.01). Those patients in whom the rapid assay became positive in < or = 10 min had the highest mortality rate of 4.2% through day 14 compared with 1.1% in those patients who had either a late-appearing positive assay (> 10 min) or a negative assay. The duration of hospital stay in the 116 patients (19%) with a positive rapid assay at enrollment was a median of 5 days compared with only 3 days in the 481 patients (81%) with a negative rapid assay at enrollment (p = 0.002).CONCLUSIONS:
A positive rapid assay for troponin T at presentation identifies those patients at risk for higher rates of adverse clinical events and longer, more complicated hospital stays. Stratification of patients by time to development of a positive rapid assay identifies those patients at highest mortality risk.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Troponina
/
Terapia Trombolítica
/
Sistemas Automatizados de Assistência Junto ao Leito
/
Angina Instável
/
Infarto do Miocárdio
Tipo de estudo:
Clinical_trials
/
Etiology_studies
/
Observational_studies
/
Prognostic_studies
Limite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
1998
Tipo de documento:
Article