S tress echocardiography (pharmaceutical or exercise) represents an important diagnostic method for the evaluation of coronary artery disease (myocardial ischemia and/or viability). The commonest protocol applied in stress echocardiography is carried out with intravenous administration of dobutamineatropine. Although some adverse reactions may appear during this procedure, many studies have pro...

OBJECTIVE To assess whether inotropic stress myocardial perfusion imaging, echocardiography, or a combination of the two could enhance the detection of multivessel disease, over and above clinical and exercise electrocardiographic data. DESIGN 100 consecutive patients investigated by exercise electrocardiography and diagnostic coronary arteriography underwent simultaneous inotropic stress Tc-...

artery disease (CAD) using noninvasive methods still presents a challenge even today. The classically used methods, such as treadmill stress testing, have a rather low specificity and sensitivity, especially in patients with one-vessel disease, as well as methodological limitations, such as in patients with mobility problems or left bundle branch block. In those patients, drug myocardial scinti...

Cantilever sensors have been extensively explored as a promising technique for real-time and label-free analyses in biological systems. A major sensing principle utilized by state-of-the-art cantilever sensors is based on analyte-induced surface stress changes, which result in static bending of a cantilever. The sensor performance, however, suffers from the intrinsically small change in surface...

The automated detection of stress is a central problem for ambient assisted living solutions. The paper presents the concepts and results of two studies targeted at stress detection with a low cost heart rate sensor, a chest belt. In the device validation study ( n = 5), we compared heart rate data and other features from the belt to those measured by a gold standard device to assess the reliab...

In the present article we review the main published data on the application of Tissue Doppler Imaging (TDI) to stress echocardiography for the detection of myocardial ischemia. TDI has been applied to stress echocardiography in order to overcome the limitations of visual analysis for myocardial ischemia. The introduction of a new technology for clinical routine use should pass through the diffe...

Adolescents are experiencing different psychological pressures coming from study, communication, affection, and self-recognition. If these psychological pressures cannot properly be resolved, it will turn to mental problems, which might lead to serious consequences. Traditional face-to-face psychological diagnosis and treatment cannot meet the demand of relieving teenagers’ stress completely du...

BACKGROUND High-rate pacing is a valid stress test to be used in conjunction with echocardiography; it is independent of physical exercise and does not require drug administration. There are two main applications of pacing stress in the echo lab: the noninvasive detection of coronary artery disease through induction of a regional transient dysfunction; and the assessment of contractile reserve ...

To improve the performance of wood decay detection, a DSP based instrument is developed using stress wave technology. Two piezoelectric receivers are used to sense the start and stop signal. The received signals are then processed with DSP technique in order to obtain the stress wave transmission time with high accuracy. In addition to the hardware design, we discuss the propagation time estima...