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In this work the reproducibility of a system for the automatic assessment of carotid intima-media thickness and stiffness from ultrasound image sequences is evaluated. Sequences of the right/left common carotid arteries of 10 healthy volunteers were analyzed repeatedly in order to evaluate the reproducibility between observers and sessions; data were presented as the coefficients of variation. Results...
A system for non-invasive and automatic assessment of systolic and diastolic duration is presented. The method is based on a accelerometer sensor which was positioned in the mid-sternal precordial region. The acceleration signal, together with an ECG signal, was recorded by a laptop PC and systole and diastole durations were computed for each cardiac beat. The system was tested in 103 patients who...
A system for non-invasive and automatic assessment of the cardiac force frequency relation (FFR) is presented. The method is based on a micro-electro-mechanical accelerometer which was used to build a cutaneous vibration sensor. The system was tested on 25 patients, 12 M and 13 F, age range 47 to 71 years, with normal ventricular function. Exercise echocardiography was scheduled in 17 patients and...
Local arterial stiffness of the superficial arteries can be evaluated by measuring the diameter change during the heart cycle from ultrasound data in conjunction with the local pulse pressure. In this work, such a system is introduced, and the obtained results on the common carotid artery are compared with those obtained by measuring the carotid to femoral pulse wave velocity (PWV) which can be considered...
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