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The fundamental concept of electroanatomic mapping systems is to localize catheters within the heart in three dimensional space (a sort of "GPS" within the heart). Building a 3-D model of the heart with real-time visualization permits reduction in fluoroscopy use. In addition to 3-D structure, the voltage and timing of signals at each point of ...
Strain in three dimensions: Basically, any object or body is three dimensional, and can be deformed in different directions simultaneously. Strain can be described as a tensor with three principal strains (ε x, ε y and ε z in a Cartesian coordinate system), and six shear strains components. In the heart, it has been customary to describe the ...
The ability to slice the virtual heart in infinite planes in an anatomically appropriate manner and to reconstruct three-dimensional images of anatomic structures make it unique for the understanding of the congenitally malformed heart. [13] Real-time three-dimensional echocardiography can be used to guide the location of bioptomes during right ...
The lumped parameter model consists in a system of ordinary differential equations that adhere to the principles of conservation of mass and momentum balance. The model is obtained exploiting the electrical analogy where the current represents the blood flow, the voltage represents the pressure difference, the electric resistance plays the role of the vascular resistance (determined by the ...
[2] [3] In post processing this can be tracked consecutively frame to frame and ultimately resolved into angle-independent two-dimensional and three-dimensional strain-based sequences . [ 3 ] [ 4 ] [ 5 ] These sequences provide both quantitative and qualitative information regarding tissue deformation and motion.
The Ravens, for instance, lost three starters on the offensive line and didn't make any major signings at that position. They drafted a tackle in the second round in Roger Rosengarten.