Methods of Visualization and Analysis of Cardiac Depolarization in the Three Dimensional Space

Research analysis of electrocardiograms (ECG) today is carried out mostly using time depending signals of different leads shown in the graphs. Definition of ECG parameters is performed by qualified personnel, and requiring particular skills. To support decoding the cardiac depolarization phase of ECG there are methods to analyze space-time convolution charts in three dimensions where the heartbeat is described by the trajectory of its electrical vector. Based on this, it can be assumed that all available options of the classical ECG analysis of this time segment can be obtained using this technique. Investigated ECG visualization techniques in three dimensions combined with quantitative methods giving additional features of cardiac depolarization and allow a better exploitation of the information content of the given ECG signals.

Stable three-dimensional biperiodic waves in shallow water /

"February 1988."

PAGAN, a three dimensional pattern generator /

"August, 1971."

Examination of the solutions of the Navier-Stokes equations for a class of three-dimensional vortices,

"Contract AF 49(638)-255."

Recirculation principle for ground effect machines; three dimensional wind tunnel tests.

"Task 9R99-005-04. Contract DA 44-177-TC-710."

The calculation of three-dimensional supersonic flows around spherically-capped smooth bodies and wings

"Work performed for the Air Force Flight Dynamics Laboratory...by the Aerodynamics Research Department of the Northrup Corporation, Aircraft Division."

HARPA : a versatile three-dimensional Hamiltonian ray-tracing program for acoustic waves in the atmosphere above irregular terrain /

Mode of access: Internet.

Dynamic three-dimensional finite element analysis of steel transportation structures : prepared for U.S. Department of Transportation, Office of the Secretary, Office of University Research /

"Final report."

A three region steam drum model for a nuclear power plant simulator (BRENDA) /

"Date published: August 1981."

The shock layer concept and three-dimensional hypersonic boundary layers.

"This report is based on research sponsored by the U.S. Navy through the Office of Naval Research, Contract Nonr-2653(00)"

The three-dimensional boundary layer /

Unclassified.

Geological-Geotechnical studies for siting the superconducting super collider in Illinois : results of drilling large-diameter test holes in 1986 /

Bibliography: p. 42-44.

Geological-geotechnical studies for siting the superconducting super collider in Illinois : results of the 1986 test drilling program /

Bibliography: p. 106-107.

Studies to develop and investigate an inverse formulation for numerically solving three-dimensional free surface potential fluid flows,

Research carried out under Naval Ship Systems Command, General Hydromechanics Research Program, subproject SR 009 01 01, administered by the Naval Ship Research and Development Center, contract no. N00014-67-A-0220-0003.

Quasi-three-dimensional supersonic viscid/inviscid interactions including separation effects : final report for period, 1 October 1972- 30 September 1975 /

Bibliography: p. 77-83.