Magnetocardiography as a Diagnostic Screening Tool for Myocarditis and Other Types of Cardiomyopathy

The MCG system utilizes an array of 64 highly sensitive magnetic sensors known as superconducting quantum interference devices (SQUIDs). These sensors are placed in a shielded environment to reduce interference from external electromagnetic sources. SQUIDs capture variations in the heart's magnetic field throughout the cardiac cycle and correlate these changes with the QRS complex. To filter out electromagnetic noise, several frequency filters are applied. The measurements provide a three-dimensional view of the magnetic field, which is used to generate a composite vector representing the primary electrical axis of the heart. In assessing inflammatory cardiomyopathies, the focus is on the vector associated with the T-wave of the action potential, i.e. the vector from the T-wave beginning to the maximum (T-beg-Tmax interval). A T-wave/MCG vector T-beg-Tmax value ≥ 0.051 has been identified as indicative of pathology, as demonstrated in our previous research.