261 Study of arterial rigidity QAS : Evaluation by radio frequency of the quality of carotide rigidity on level in real-time, in patients with cardiovascular risk factors - 07/07/11
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Résumé |
Objective |
Evaluation by radio frequency in real-time, the quality of arterial rigidity in patients with cardiovascular risk factors.
Method |
3 measurements each carotid artery to determined coefficients, parameters rigidity, velocity of wave of pulse according by age. Quality of the rigidity of the arterial wall is measured from the velocity of the wave of pulse (PWV), variation of arterial diameter blood pressure on level of humeral artery, with measures of rigidity parameters.
Results |
2 carotid axes: 200 patients, 3 groups (age 30–69) according by age, sex, race 2 groups: white race, dyslipidemia, type II diabetes, smoking: according by sex. 1 group: 60 M, white race, the 2 group: 40 F (white race), 3 group 50 patients (hypertension, overweight) according to the sex and race; in 2 sub-groups: group A 25 M (20 white race, 5 black) group B 25 F white race. Brachial blood pressure calculated to obtain the velocity of the wave of pulse, coefficients of arterial rigidity, local pressure. The pathological wave of pulse >13m/s, coefficients of rigidity: >11, β > 20. In the 2 groups (10% men, 8% women) had pathological >11, β>20 and velocity propagation of PWV >13 m/s. In 3 group 20% M, 12% F with hypertension, pathological rigidity, local pressure systolic increased despite the treatment.
Conclusion |
QAS non invasive mesure of arterial rigidity on carotid, independent marker, in patients with cardiovascular risk factors, study the local and central blood pressure hypertensive patients to better control a pharmacological therapy. QAS by radiofrequency calculation of arterial rigidity on carotid level, parameters of rigidity, and velocity of propagation of wave of pulse, the local and central pressure of the studied artery. In 1 and 2 group, patients with nicotinic intoxication and risk factors, in 3 group (hypertension, overweight) not find pathological data neither differences according to the sex and the race among all hypertensive patients. 2 patients of race black, 5 of the sub-group (hypertension) with pathological coefficient > 11.
QAS |
calculation of arterial rigidity, RF: radio frequency, PWV (wave velocity pulse), β: stiffness parameters.
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Vol 3 - N° 1
P. 85-86 - janvier 2011 Retour au numéro
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