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Association of aortic flow propagation velocity with ankle-brachial blood pressure index in patients with hypertension: an observational study [Anatol J Cardiol]
Anatol J Cardiol. 2012; 12(7): 568-573 | DOI: 10.5152/akd.2012.186

Association of aortic flow propagation velocity with ankle-brachial blood pressure index in patients with hypertension: an observational study

Ahmet Güneş1, Ünal Güntekin2, Sema Yıldız3, Bedri Caner Kaya2, Ethem Deveci2, Zekeriya Kaya2, Yusuf Sezen2
1Clinic of Cardiology, Urfa Heart Center, Şanlıurfa-Turkey
2Department of Cardiology Faculty of Medicine, Harran University, Şanlıurfa-Turkey
3Department of Radiology Faculty of Medicine, Harran University, Şanlıurfa-Turkey

Objective: Endothelial dysfunction is considered the first stage in the development of atherosclerosis and assessed by flow-mediated dilatation (FMD) and aortic flow velocity propagation (AVP). Ankle-brachial index (ABI) is used to assess peripheral arterial disease and is associated with FMD but the relationship between ABI and AVP is unknown. In this study, we aimed to search the association between AVP, and ABI in patients with newly diagnosed hypertension. Methods: Sixty-eight patients with newly diagnosed hypertension and 34 healthy subjects were enrolled in the cross-sectional observational study. The maximum ankle arterial pres-sures were divided by the maximum of the brachial arterial pressures to calculate the ABI. AVP was calculated from dividing the distance between points corresponding to the begin-ning and end of the propagation slope, to the duration between corresponding time points proximally descending aorta. Statistical analysis was performed using Student t-test, Chi-square test, Pearson correlation and linear regression analyses. Results: Age and gender of both groups were similar. Compared to control group E decelera-tion time of early diastolic flow velocity (184.0±32.2 vs. 217.1±38.6, p<0.001), isovolumic relaxation time (95.5±19.4 vs. 105.7±18.1, p<0.001) and body mass index (25.6±5.1 vs. 27.5±3.8, p=0.044) values were significantly higher, while ABI (1.08±0.07 vs. 1.14±0.07, p=0.001) and AVP (54.97±9.3 vs. 69.17±10.8 cm/sec, p=0.001) values were significantly lower in hypertensive patients. There was a significant correlation between AVP and ABI (r=0.279, p=0.005). Both ABI and AVP were independent predictors of hypertension (OR - 0.353, 95%CI 0.151-0.826, p=0.02 and OR - 0.133, 95%CI 0.0502-0.35, p=0.001, respectively). Conclusion: Our data indicate that in patients with isolated hypertension AVP and ABI decrease. We also conclude that AVP is directly associated with ABI.

Keywords: Hypertension, ankle-brachial index, propagation velocity, regression analysis

Ahmet Güneş, Ünal Güntekin, Sema Yıldız, Bedri Caner Kaya, Ethem Deveci, Zekeriya Kaya, Yusuf Sezen. Association of aortic flow propagation velocity with ankle-brachial blood pressure index in patients with hypertension: an observational study. Anatol J Cardiol. 2012; 12(7): 568-573