title: Correlation between serum cystatin C level and elderly hypertensive patients combined coronary heart disease.
abstract: OBJECTIVE
  To explore the correlation between serum cystatin C level and elderly hypertension with coronary heart disease patients.
  
  
  METHODS
  500 hypertensive patients combined coronary heart disease were selected by coronary angiography. 321 of them were elderly patients with hypertension (male 204, female 117), and 400 of them were elderly patients with coronary heart disease (male 257, female 143), The serum cystatin C level of all patients were detected by immunoturbidimetry, and analyzed the correlation between the serum cystatin C level and different degree of blood pressure and the degree of coronary artery stenosis in elderly patients.
  
  
  RESULTS
  The serum cystatin C level was closely related with the blood pressure and the degree of the coronary artery stenosis. The higher the blood pressure level and the more serious the coronary artery stenosis, the higher the serum cystatin C level; The serum cystatin C level of hypertensive patients with coronary heart disease patients (Group D) were markedly higher than the level of the patients without hypertension and coronary heart disease patients (Group A), and the level of the patients with coronary heart disease (Group B) and the hypertension group (Group C) (P < 0.05).
  
  
  CONCLUSIONS
  The serum cystatin C level of elderly patients with hypertension and coronary heart disease were closely related with the degree of blood pressure and coronary arteries stenosis. The serum cystatin C maybe a predictor of disease severity in elderly hypertensive patients with coronary heart disease.
authors.affiliation: The Medicine School of Xi'an Jiaotong University Xi'an 710061, Shaanxi ; Department of Geriatric Cardiology, The Nuclear Industry 215 Hospital Xianyang 712000, Shaanxi.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.affiliation: The Department of Geriatrics Cardiology, First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, Shaanxi.
authors.forename: Xianming
authors.initials: X
authors.lastname: Su
authors.affiliation: The Department of Geriatrics Cardiology, First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, Shaanxi.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: The Department of Geriatrics Cardiology, First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, Shaanxi.
authors.forename: Wei
authors.initials: W
authors.lastname: Yang
authors.affiliation: The Department of Geriatrics Cardiology, First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, Shaanxi.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.affiliation: The First Department of Cardiology, The Nuclear Industry 215 Hospital Xianyang 712000, Shaanxi.
authors.forename: Yajun
authors.initials: Y
authors.lastname: He
keywords: Cystatin C; coronary artery disease; correlation; elderly patients; hypertension