Detection of Pathologic Heart Murmurs Using a Piezoelectric Sensor

Heart murmurs.

Heart murmurs.

to this article. Introduction Heart murmurs are heard commonly in infants, children, and adolescents. Approximately 50% to 70% of individuals seen for school or sports preparticipation examinations have a heart murmur. Indeed, a murmur is heard in most children at one or more of their examinations. Because most murmurs are innocent (ie, normal), it is important to differentiate those that are a...

Detection of gold nanoparticles using an immunoglobulin-coated piezoelectric sensor.

Since the existence of nanoparticles in our environment has already attracted considerable attention due to their possible toxic impact on biological systems, the field detection of nanoparticles is becoming a technology that will be much in need. We have constructed a piezoelectric sensor with an antibody-coated electrode. The antiserum can bind gold nanoparticles with a high degree of selecti...

Detection of Cardiac Murmurs

The project describes a system for detecting cardiac murmurs so people are aware about their heart condition. The murmurs are the pathologic heart sounds that are produced because of turbulent blood flow that is enough to cause audible noise. Murmurs can be detected by a stethoscope but the accuracy level is not satisfactory. Different methods have been developed for detection and all are effic...

Modeling and analysis of a three-component piezoelectric force sensor

This paper presents a mathematical model for the vibration analysis of a three-component piezoelectric force sensor. The cubic theory of weakly nonlinear electroelasticity is applied to the model for describing the electromechanical coupling effect in the piezoelectric sensing elements which operate in thickness-shear and thickness-stretch vibration modes. Hamilton's principle is used to derive...