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Abstract

Although aortic stiffness plays an important role in patients with coronary artery disease (CAD), the influence of aortic stiffness on left ventricular systolic function has not yet been fully evaluated. In the present study, we measured brachial-ankle pulse wave velocity (baPWV), which is a new index of aortic stiffness, in patients with CAD (CAD group, n = 170, 67 +/- 9 years old) and without CAD (non-CAD group, n = 81, 63 +/- 8 years old), and evaluated the relationship between baPWV and left ventricular systolic function in patients with CAD. baPWV in the CAD group was significantly higher than that in the non-CAD group (1,794 +/- 350 vs. 1,469 +/- 292 cm/s, p < 0.05), although both systolic and diastolic blood pressure were comparable between the two groups. In the CAD group, the baPWV was higher in patients with three-vessel disease than that in patients with one-vessel disease (1,885 +/- 542 vs. 1,720 +/- 373 cm/s, p < 0.05). In the CAD group, multivariate analysis demonstrated that baPWV and pulse pressure independently correlated with left ventricular ejection fraction (LVEF). In conclusion, in patients with CAD, baPWV, which is a simple marker of aortic stiffness, increases with CAD severity and correlates with left ventricular systolic function independent of CAD severity. Copyright 2005 S. Karger AG, Basel.

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Validity, reproducibility, and clinical significance of noninvasive brachial-ankle pulse wave velocity measurement.

Akira Yamashina, Hirofumi Tomiyama, Kazuhiro Takeda … (2002)

The present study was conducted to evaluate the validity and reproducibility of noninvasive brachial-ankle pulse wave velocity (baPWV) measurements and to examine the alteration of baPWV in patients with coronary artery disease (CAD). Simultaneous recordings of baPWV by a simple, noninvasive method and aortic pulse wave velosity (PWV) using a catheter tip with pressure manometer were performed in 41 patients with CAD, vasospastic angina, or cardiomyopathy. In 32 subjects (15 controls and 17 patients with CAD), baPWV was recorded independently by two observers in a random manner. In 55 subjects (14 controls and 41 patients with CAD), baPWV was recorded twice by a single observer on different days. baPWV were compared among 172 patients with CAD (aged 62 +/- 8 years); 655 age-matched patients without CAD but with hypertension, diabetes mellitus, or dyslipidemia; and 595 age-matched healthy subjects without these risk factors. baPWV correlated well with aortic PWV (r=0.87, p<0.01). Pearson's correlation coefficients of interobserver and intraobserver reproducibility were r=0.98 and r=0.87, respectively. The corresponding coefficients of variation were 8.4% and 10.0%. baPWV were significantly higher in CAD patients than in non-CAD patients with risk factors, for both genders (p<0.01). In addition, baPWV were higher in non-CAD patients with risk factors than in healthy subjects without risk factors. Thus, the validity and reproducibility of baPWV measurements are considerably high, and this method seems to be an acceptable marker reflecting vascular damages. baPWV measured by this simple, noninvasive method is suitable for screening vascular damages in a large population.

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Influences of age and gender on results of noninvasive brachial-ankle pulse wave velocity measurement--a survey of 12517 subjects.

Hirofumi Tomiyama, Akira Yamashina, Tomio Arai … (2003)

The present study was conducted to evaluate the influences of age and gender on the results of noninvasive brachial-ankle pulse wave velocity (baPWV). In 12517 subjects who had no medication and no history of cardiovascular diseases, multiple regression analysis demonstrated that age, blood pressure, body mass index, triglycerides, blood glucose, and uric acid were significant variables for baPWV in both genders. From this population, we extracted 7881 "healthy subjects" (4488 males and 3393 females, 25-87 years) without any of the atherogenic risk factors, and the results of baPWV were analyzed chronologically in 5-year age intervals. baPWV was lower in females than in males until age 60, and became similar in both genders over age 60. Multiple regression analysis demonstrated that not only the value of R(2) but also the coefficient of the effect of age on baPWV are larger in females than in males. In the estimation of the regression curve, the relationship between age and baPWV demonstrated a quadratic curve in both genders. Thus, aging influences baPWV, and its effect is more prominent in female. Menopause seems to be the crucial phenomenon to explain the augmented increase in arterial stiffness with aging in females.

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Aortic Stiffness Is an Independent Predictor of Primary Coronary Events in Hypertensive Patients: A Longitudinal Study

P Boutouyrie, S Laurent, P Lacolley … (2002)

Arterial stiffness may predict coronary heart disease beyond classic risk factors. In a longitudinal study, we assessed the predictive value of arterial stiffness on coronary heart disease in patients with essential hypertension and without known clinical cardiovascular disease. Aortic stiffness was determined from carotid-femoral pulse wave velocity at baseline in 1045 hypertensives. The risk assessment of coronary heart disease was made by calculating the Framingham risk score according to the categories of gender, age, blood pressure, cholesterol, diabetes, and smoking. Mean age at entry was 51 years, and mean follow-up was 5.7 years. Coronary events (fatal and nonfatal myocardial infarction, coronary revascularization, and angina pectoris) and all cardiovascular events served as outcome variables in Cox proportional-hazard regression models. Fifty-three coronary events and 97 total cardiovascular events occurred. In univariate analysis, the relative risk of follow-up coronary event or any cardiovascular event increased with increasing level of pulse wave velocity; for 1 SD, ie, 3.5 m/s, relatives risks were 1.42 (95% confidence interval [CI], 1.10 to 1.82; P<0.01) and 1.41 (95% CI, 1.17 to 1.70; P<0.001), respectively. Framingham score significantly predicted the occurrence of coronary and all cardiovascular events in this population (P<0.01 and P<0.0001, respectively). In multivariate analysis, pulse wave velocity remained significantly associated with the occurrence of coronary event after adjustment either of Framingham score (for 3.5 m/s: relative risk, 1.34; 95% CI, 1.01 to 1.79; P=0.039) or classic risk factors (for 3.5 m/s: relative risk, 1.39; 95% CI, 1.08 to 1.79; P=0.01). Parallel results were observed for all cardiovascular events. This study provides the first direct evidence in a longitudinal study that aortic stiffness is an independent predictor of primary coronary events in patients with essential hypertension.

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PubMed ID:: 15591710

DOI:: 10.1159/000082472

ScienceOpen disciplines: Chemistry

Keywords: Aged,Ankle,blood supply,Aorta,physiopathology,Brachial Artery,physiology,Coronary Angiography,Coronary Disease,radiography,ultrasonography,Echocardiography, Doppler,Elasticity,Female,Humans,Male,Multivariate Analysis,Predictive Value of Tests,Risk Factors,Ventricular Function, Left

Aortic stiffness is an independent predictor of left ventricular function in patients with coronary heart disease.

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Karger: Cardiovascular System

Most cited references 10

Validity, reproducibility, and clinical significance of noninvasive brachial-ankle pulse wave velocity measurement.

Influences of age and gender on results of noninvasive brachial-ankle pulse wave velocity measurement--a survey of 12517 subjects.

Aortic Stiffness Is an Independent Predictor of Primary Coronary Events in Hypertensive Patients: A Longitudinal Study

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