The method of presenting concurrent information about the electrical and mechanical
activity of the heart using non-invasively obtained electrical and mechanical cardiac
activity data from the chest or thorax of a patient comprises the steps of: placing
at least three active Laplacian ECG sensors at locations on the chest or thorax
of the patient; where each sensor has at least one outer ring element and an inner
solid circle element, placing at least one ultrasonic sensor on the thorax where
there is no underlying bone structure, only tissue, and utilizing available ultrasound
technology to produce two or three-dimensional displays of the moving surface of
the heart and making direct measurements of the exact sites of the sensors on the
chest surface to determine the position and distance from the center of each sensor
to the heart along a line orthogonal to the plane of the sensor and create a virtual
heart surface; updating the measurements at a rate to show the movement of the
heart's surface; monitoring at each ultrasonic sensor site and each Laplacian ECG
sensor site the position and movement of the heart and the passage of depolarization
wave-fronts in the vicinity; treating those depolarization wave-fronts as moving
dipoles at those sites to create images of their movement on the image of the beating
heart's surface; and, displaying the heart's electrical activity on the dynamically
changing image of the heart's surface with the goal to display an approximation
of the activation sequence on the beating virtual surface of the heart