A correction needs to be made to the device's algorithm.

A prospective multi-centre observational study to validate the diagnostic accuracy of a transportable magnetocardiograph device for acute coronary syndrome (ACS), focusing on rule-out capability, in patients who present to the emergency department with chest pain symptoms consistent with ACS.

Inclusion Criteria:

• Patient presents to the ED with chest pain syndrome of suspected cardiac origin (i.e. symptoms consistent with ACS)
• 18+ year old male or female
• Patient is willing and able to give written informed consent

Exclusion Criteria:

• ST-segment Elevation MI (STEMI)
• Clear non-ischemic cause for symptoms (e.g. trauma)
• Hemodynamic instability on admission (e.g. BP>220mmHg systolic & >110mmHg diastolic, <80mmHg systolic & <40mmHg diastolic, HR>160bpm)
• Ventricular tachycardia or fibrillation that cannot be treated effectively
• Atrial fibrillation
• Thoracic metal implants
• Pacemaker or internal defibrillator
• Pregnancy (if after 20-week period)* or lactation
• Patient unable to lie down (i.e. supine position) or stay still on the examination bed
• Patient unable to understand the informed consent process and/or has a poor understanding of English (e.g. English- speaking relative/translator not available)
• Patient unable to comply with the requirements of the protocol

All patients that present to the ED with chest pain syndrome of suspected cardiac origin (i.e. symptoms consistent with ACS) who are in normal sinus rhythm