RESUMEN
BACKGROUND: The aim of this study was to observe the association between fibrinogen C148T, G854A polymorphisms and plasma fibrinogen levels in a large cohort of Chinese patients with coronary heart disease (CHD). METHODS: Fibrinogen gene beta148/beta854 polymorphisms were screened and plasma fibrinogen levels and lipids were measured in patients with angiographically confirmed CHD (n = 836) and in controls without CHD (n = 418). RESULTS: Age, sex, smoking, hypertension, diabetes mellitus, blood lipids and fibrinogen levels were related to CHD (all p < 0. 05) while the frequencies of fibrinogen beta148 and beta854 alleles, gene and genotypes between the two groups were similar (all p > 0.05). CONCLUSION: This study demonstrates that the plasma fibrinogen level, but not fibrinogen beta148 and beta854 genotypes, was associated with CHD in the Chinese population.
Asunto(s)
Enfermedad Coronaria/genética , Fibrinógeno/genética , Polimorfismo Genético , Anciano , China/epidemiología , Estudios de Cohortes , Comorbilidad , Enfermedad Coronaria/sangre , Enfermedad Coronaria/epidemiología , Femenino , Fibrinógeno/análisis , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa , Factores de Riesgo , Distribución por SexoRESUMEN
OBJECTIVE: To assess the predictive value of heart rate turbulence (HRT) in patients with acute myocardial infarction. METHODS: One hundred and twenty-five patients with acute myocardial infarction were enrolled in this study. During the period from 6 to 21 days after onset of acute myocardial infarction, they were undergone 24-hour Holter recordings to collect the mean RR interval and heart rate variability (HRV) SDNN. The Holter files were processed with software of "HRT! View V0.60-1" to obtain the value of Turbulence Onset (TO) and Turbulence Slope (TS) and the value of "heart rate variability (HRV) SDNN". LVEF and EDD were measured by Ultrasonic Cardiography. Endpoint of follow-up was cardiac death. According to the results, patients were divided into two groups (the "survivors" and the "nonsurvivors"). The predictive value for high-risk patients with acute myocardial infarction was assessed by variables between the two groups. RESULTS: In the period of follow-up (mean 225.4 +/- 99.8 days), 14 patients died and 111 patients survived. In the univariate Cox regression analysis, "TS" was a strong univariate predictor of mortality (hazard ratio 11.46, P < 0.01); "TO" was a relatively weak predictor and the hazard ratio was 2.76 (P > 0.05). Combination of abnormal TO and abnormal TS was the strongest mortality predictor (hazard ratio 26.70, P < 0.01); in the multivariate Cox regression analysis, TS < or = 2.5 ms/RR and EDD > or = 5.6 cm were the independent predictors of mortality with hazard ratios 9.49 (P < 0.01) and 3.64 (P < 0.05), respectively. CONCLUSIONS: The absence of the heart rate turbulence after ventricular premature beats is a very potent post-infarction risk predictor which is independent of and stronger than other known risk predictors.