Progress in Clinical Magnetocardiography: The Contactless Breakthrough for Noninvasive Clinical Detection of Cardiac Ischemia Now Needs Worldwide Standardization

TL;DR

A new contactless heart imaging technique shows promise for detecting heart disease but needs global standards to be widely adopted.

Contribution

Optically pumped magnetometers enable noninvasive MCG with superior performance over ECG for ischemic heart disease detection.

Findings

OPM-based MCG outperforms rest and stress ECG in detecting or excluding ischemic heart disease.

MCG could serve as a cost-effective first-level test for chest pain patients with suspected heart issues.

Lack of international standards limits MCG's clinical adoption despite its advantages.

Abstract

What are the main findings?
A novel technology, optically pumped magnetometers (OPMs) (favoring clinical trials on a large population), has provided substantial evidence supporting the superior performance of rest magnetocardiography (MCG) in the detection or exclusion of ischemic heart disease, compared with rest and even stress ECG.A coordinated international and interdisciplinary effort is needed to standardize magnetocardiography for clinical use.

A novel technology, optically pumped magnetometers (OPMs) (favoring clinical trials on a large population), has provided substantial evidence supporting the superior performance of rest magnetocardiography (MCG) in the detection or exclusion of ischemic heart disease, compared with rest and even stress ECG.

A coordinated international and interdisciplinary effort is needed to standardize magnetocardiography for clinical use.

What are the implications of the main findings?
With appropriate standardization, OPM-based MCG could become a quick (and cost-effective) first-level examination approach for the earlier detection of or to rule out signs of myocardial ischemia, especially for patients with chest pain from suspected acute coronary syndrome (ACS) or ischemia with non-obstructive coronary arteries (INOCA), but no diagnostic high-sensitivity troponin or ECG patterns.The establishment of an interdisciplinary expert commission is now essential to define consensus-based recommendations for MCG clinical use.

With appropriate standardization, OPM-based MCG could become a quick (and cost-effective) first-level examination approach for the earlier detection of or to rule out signs of myocardial ischemia, especially for patients with chest pain from suspected acute coronary syndrome (ACS) or ischemia with non-obstructive coronary arteries (INOCA), but no diagnostic high-sensitivity troponin or ECG patterns.

The establishment of an interdisciplinary expert commission is now essential to define consensus-based recommendations for MCG clinical use.

Magnetocardiography has received regulatory recognition as a contactless, sensitive aid for physicians to diagnose or exclude myocardial ischemia in chest pain patients, with or without coronary obstruction. Such success, however, might not equate to guideline endorsement or proven clinical effectiveness. Moreover, despite its intrinsic advantages, including unrivalled contactless functional imaging of cardiac electrophysiology and a strong potential for multimodal integration with other imaging methods, its clinical adoption remains limited by the lack of internationally recognized standards and guidelines. This Perspective Review article, highlighting the viewpoints of clinical end users, is a call for urgent action to establish an interdisciplinary expert commission. This is essential for defining consensus-based standards and recommendations for the clinical use of MCG.

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