Context: Elevated Inter-arm differences in blood pressure (IAD), besides those due to rare cardiovascular diseases, seem to be a predictor of cardiovascular events. Moreover few studies have been performed among black africans.Objective:
Objective: To determine the interaction between inter-arm difference in blood pressure and cardiovascular risk level among the Black African.Design and method:
This is case-control study was conducted in Department of Cardiology at he University Teaching Hospital (CHU) of Bouake with 151 uncomplicated hypertension (group 1) and 154 complicated hypertensive with heart failure (group 2) and 164 controls (group 0), for which we evaluated the IAD and sought the determinants of this measure.Results:
The average IAD was respectively in groups 0, 1 and 2: 5.31 ± 3.63 mmHg, 8.98 ± 11.71 mmHg, and 7.23 ± 6.44 mmHg (p < 0.0001) for systolic BP and 3.58 mmHg ± 3.13, 4.41 ± 2.86 mmHg and 4.41 ± 2.86, 9 (p = 0.0002) for diastolic BP. The prevalence of IAD of the systolic BP superior to 10 mmHg was respectively 15.2%, 31.8% and 28.8% (p = 0.0001) and IAD diastolic BP more than 10 mmHg was respectively 4.87%, 6.62% and 6.41 (p = 0.77) in the group in 0, 1 and 2.Results:
In group 1, the IAD for systolic BP was correlated to the number of cardiovascular risk factor (r = 0.24; p = 0.003), the body mass index (r = 0.26; p = 0.003) and the waist circumference (r = 0.32; p < 0.0001). She was poorly correlated to global cardiovascular risk (r = 0.15; p = 0.052).Conclusions:
IAD was therefore higher in hypertensive than in normotensive patients. Heart failure does not increase IAD and seem to be determined by the risk factors and some anthropometric data.