Exploring the Application Value of Magnetocardiography in Detecting Pulmonary Hypertension: A Noninvasive and Visual Approach.

The MCG detection model achieved robust performance in distinguishing PH patients from healthy controls in the testing cohort.

• Sensitivity of 86.1% and specificity of 94.1% were achieved in the testing cohort.
• The study analyzed 175 PH patients and 333 healthy subjects who underwent MCG examination.
• Logistic regression was used to screen for significant parameters and develop the model from nine MCG parameters.
• The training cohort consisted of PH patients previously diagnosed by right heart catheterization (RHC) and age-frequency-matched healthy controls.

Pseudo-current density maps revealed distinct directional differences in current vectors at the R-wave peak between healthy controls and PH patients.

• In healthy controls, the current vector at the R-wave peak points toward the lower-left quadrant.
• In PH patients, the current vector at the R-wave peak points toward the lower-right quadrant.
• This finding provides a visual and spatially distinguishable marker of PH detectable by MCG.

MCG demonstrated greater sensitivity than ECG for detecting PH, but slightly lower specificity.

• Compared to ECG of PH patients, MCG demonstrated greater sensitivity.
• MCG exhibited slightly lower specificity compared to ECG.
• MCG was able to detect PH in patients with normal ECG findings, indicating added diagnostic value beyond standard ECG.

The study design included a testing cohort of patients who underwent both MCG and RHC on the same day to validate the model.

• The testing cohort comprised age- and frequency-matched healthy controls and PH patients who underwent both MCG and RHC on the same day.
• Nine MCG parameters were included in the analysis.
• Right heart catheterization served as the reference standard for PH diagnosis in both training and testing cohorts.

MCG has demonstrated potential value in cardiovascular diseases owing to its exceptional spatiotemporal resolution.

• The study describes MCG as having 'exceptional spatiotemporal resolution.'
• This exploratory study investigated MCG variations in PH patients and evaluated utility in distinguishing healthy subjects from those with PH.
• The authors conclude that 'MCG demonstrates highly promising potential for the noninvasive detection of PH.'