The author, Dr.Ebrahim reported a case that MCG score is low even the stenosis is recognized by CTA. However in this patient, he also recognized collateral circulation supplying enough blood to the heart cell instead of the main vessel, which may affect the MCG score is low.
He concluded “Coronary artery computed tomography angiogram is currently used to assess coronary artery disease. Multifunction cardiogram is a new diagnostic tool in
cardiac care to detect microvascular and cellular function of the heart muscles.”
For details, please see the attached journal.