Boris Gramatikov: High-resolution signal averaged XYZ vector magnitudes

Boris Gramatikov, PhD

High-resolution signal averaged XYZ vector magnitudes.

Filter used: bidirectional, IIR, Simson type. The last 40 ms of the QRS are marked.

NORMAL SUBJECT	Normal subject: QRS ending abruptly.
VT PATIENT WITH LATE POTENTIALS	VT patient with late potentials: QRS decaying slowly.