An Exploratory Clinical Study to Evaluate the Specificity of Magnetocardiogram in Atrial Fibrillation and the Prediction of Recurrence

Group: Group 1 (Persistent AF) Inclusion criteria：

• Persistent AF is recorded by ECG before the examination of the magnetocardiogram;
• Detailed clinical records, including medical history, cardiovascular risk factors,blood tests, and antiarrhythmic drug therapy;
• It is recommended that antiarrhythmic drugs be discontinued at least 5 days before theexamination and continue if atrial fibrillation occurs or the symptoms of atrialfibrillation are obvious;

Exclusion criteria:

• Severe valvular heart disease, structural heart disease, heart function classification ≥ New York Heart Association functional class II, history of ischemic heart disease,left ventricular ejection fraction < 50%, hyperthyroidism, primary pulmonaryhypertension, and respiratory disease;
• Patients after radiofrequency ablation;
• The implanted devices in the body effect the magnetic signal during the detectionprocess, such as prosthetic limbs, heart stents or valves contain metal material.
• Unable to maintain the supine position during the examination. Group: Group 2 (Paroxysmal AF) Inclusion criteria:
• Persistent AF is recorded by ECG before the examination of the magnetocardiogram;
• Detailed clinical records, including medical history, cardiovascular risk factors,blood tests, and antiarrhythmic drug therapy;
• It is recommended that antiarrhythmic drugs be discontinued at least 5 days before theexamination and continue if atrial fibrillation occurs or the symptoms of atrialfibrillation are obvious; Exclusion criteria:
• Severe valvular heart disease, structural heart disease, heart function classification ≥ New York Heart Association functional class II, history of ischemic heart disease,left ventricular ejection fraction < 50%, hyperthyroidism, primary pulmonaryhypertension, and respiratory disease;
• Patients after radiofrequency ablation;
• The implanted devices in the body effect the magnetic signal during the detectionprocess, such as prosthetic limbs, heart stents or valves contain metal material.
• Unable to maintain the supine position during the examination. Group: Control group Inclusion criteria:
• No history of AFor other arrhythmias;
• Detailed clinical records, including medical history and cardiovascular risk factors; Exclusion criteria:
• severe valvular heart disease, structural heart disease,heart function classification ≥ New York Heart Association functional class II, history of ischemic heart disease,left ventricular ejection fraction < 50%, hyperthyroidism, primary pulmonaryhypertension, and respiratory disease;
• The implanted devices in the body effect the magnetic signal during the detectionprocess, such as prosthetic limbs, heart stents or valves contain metal material.
• Unable to maintain the supine position during the examination.