Numeric regularization methods most often used to solve the ill-posed inverse problem of
electrocardiography are spatial and ignore the temporal nature of the problem. In this paper, a …

Background—The feasibility of measuring cavitary electrograms using a noncontact probe
and reconstructing endocardial surface electrograms and activation sequences during paced …

To advance methods for managing heart rhythm abnormalities, improved methods are
needed to map the electrical activity of the heart. The solution of the discrete, ill-posed …

Numeric regularization methods for solving the inverse problem of electrocardiography in
realistic volume conductor models have been mostly limited to uniform regularization in the …

Cavitary electmgrams previously were measured from multiple directions simultaneously in
the canine left ventricle with the use of noncontact multielectrode probes. The objective of the …

An investigation was conducted in the static test facility of the Langley 16-Foot Transonic
Tunnel to determine the flow-turning capability and the nozzle internal performance of an …

The effects of geometric design parameters on the internal performance of nonaxisymmetric
single expansion-ramp nozzles were investigated at nozzle pressure ratios up to …

The internal performance of an axisymmetric convergent-divergent nozzle and a nonaxisymmetric
convergent-divergent nozzle, both of which utilized a gimbal type mechanism for …

A method based on computed-tomographic reconstruction was developed to determine
three-dimensional locations of electrodes on a concentric pair of a cylindrical probe and a basket…

An adaptive spatial regularization method was developed and applied to solving the inverse
problem of electrocardiography for reconstruction of endocardial electrograms based on …