Comparação do índice tornozelo-braquial com parâmetros de rigidez e resistência arterial periférica avaliados pela fotopletismografia em idosos

The ankle-brachial index (ABI) uses the ratio of ankle and arm systolic blood pressure to noninvasive diagnose peripheral arterial disease (PAD). Photoplethysmography (PPG) measures and records changes in the blood volume of the human body through optical techniques. The objective of this study was to compare ABI with parameters of stiffness and peripheral arterial resistance assessed by PPG in the elderly. A quantitative cross-sectional study was performed. The sample consisted of elderly patients attending the specialty medical outpatient clinic (AME) of UNISUL, Campus Tubarao / SC. Age, sex, body mass index (BMI), presence of comorbidities, smoking and physical activity were verified. Aqwave pulse oximeter and automatic oscillometric sphygmomanometer OMRON HEM 7113 were used to evaluate PPG and ITB. For comparison of the variables obtained with PPG and ITB, a bivariate and multivariate linear regression was performed, considering error =0,05. It was evaluated 93 elderly, 63.4% female. In general, the ITB was within normal limits. In the comparison of ABI and variables derived from PPG in relation to age, significant associations were demonstrated. However, in the correlations between ITB and PPG, no significant associations were observed. In conclusion, the ITB and the PPG showed association with the arterial aging, however, the ABI and PPG were not associated. Perhaps by the profile of the sample without the presence of DAP. More studies are needed to evaluate the potential use of PPG as screening for vascular diseases in outpatient routines.