Value of QT hysteresis during treadmill exercise test for diagnosing coronary heart disease / 中华心血管病杂志
Chinese Journal of Cardiology
; (12): 589-592, 2012.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-326464
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the value of QT hysteresis index during treadmill exercise test (TET) in diagnosing coronary heart disease (CHD).</p><p><b>METHODS</b>One hundred consecutive patients suspected for CHD were referred for TET and selective coronary angiography (CAG). Patients were divided into positive [n = 55, age (56.0 ± 7.9) years] and negative [n = 45, age (53.2 ± 6.7) years] group based on their CAG results. For each TET recording, 50 points were selected for the RR, QTp, and QTe interval measurements. QTp and QTe interval was plotted against corresponding RR interval. QT/RR curve was constructed by connect all point, QT hysteresis index was calculated for each patient.</p><p><b>RESULTS</b>The QTp [(22.4 ± 10.3) ms vs. (6.7 ± 4.6) ms, P < 0.001] and QTe [(27.1 ± 11.1) ms vs. (7.6 ± 4.6) ms, P < 0.001] hysteresis index of patients in positive group were significantly higher than those in negative group. The sensitivity of QTp and QTe hysteresis index for diagnosing CHD was 89.1% (49/55) and 94.5% (52/55), respectively, and the specificity was 82.2% (37/45) and 80.0% (36/45), respectively. If the patient fulfilled both the classical TET and QT hysteresis criteria, the sensitivity for diagnosing CHD increased to 94.3% (33/35, QTp) and 94.6% (35/37, QTe), and the specificity were both 100% (26/26, 26/26). Moreover, QTp (r = -0.399, P < 0.001) and QTe (r = -0.547, P < 0.001) hysteresis index highly correlated to Duke treadmill score.</p><p><b>CONCLUSION</b>QT hysteresis index is useful parameter for CHD diagnosis and which could improve the diagnostic value of TET for CHD in combination with the classical TET criteria for diagnosis of CHD.</p>
Texto completo:
Disponível
Contexto em Saúde:
ODS3 - Meta 3.4 Reduzir as mortes prematuras devido doenças não transmissíveis
Problema de saúde:
Doença Cardiovascular
/
Doença Isquêmica do Coração
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Sensibilidade e Especificidade
/
Doença das Coronárias
/
Diagnóstico
/
Eletrocardiografia
/
Teste de Esforço
/
Frequência Cardíaca
/
Métodos
Tipo de estudo:
Estudo diagnóstico
Aspecto:
Preferência do paciente
Limite:
Adulto
/
Idoso
/
Feminino
/
Humanos
/
Masculino
Idioma:
Chinês
Revista:
Chinese Journal of Cardiology
Ano de publicação:
2012
Tipo de documento:
Artigo