Efficacy of the CMI Magnetocardiograph in Diagnosing Acute Coronary Syndromes in Patients Presenting With High Risk Unstable Angina.
A magnetocardiograph (MCG) is a device capable of recording of magnetic fields arising from the electrical activity of the heart with traces similar to an electrocardiogram (ECG). This system was developed as a noninvasive, non-contact diagnostics of obstructive coronary artery disease (CAD), and especially of lack of oxygen in the heart as in a heart attack. The overall objective of this study is to demonstrate the efficacy of this MCG device for the detection and diagnosis of lack of oxygen of the heart in patients with chest pain.
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Efficacy of the CMI Magnetocardiograph in Diagnosing Acute Coronary Syndromes in Patients Presenting With High Risk Unstable Angina as Defined by ACC/AHA Guidelines|
- 1. Determine the discriminatory ability of the scores derived from the MCG evaluation to discriminate between patients with versus without a clinical diagnosis of ACS at discharge. [ Time Frame: 1 year ] [ Designated as safety issue: No ]
- 2. Compare the discriminatory ability of scores derived from the MCG, the troponin level, and the ECG results, separately or in combination, to discriminate between patients with without a diagnosis of ACS at discharge. [ Time Frame: 1 year ] [ Designated as safety issue: No ]
- 1. Evaluate the sensitivity of the MCG to detect an ultimate diagnosis of ACS, MI, CHF, or death at 1 month, 6 months, and 1 year following discharge. [ Time Frame: 1 year ] [ Designated as safety issue: No ]
|Study Start Date:||August 2004|
|Study Completion Date:||February 2008|
|Primary Completion Date:||February 2008 (Final data collection date for primary outcome measure)|
Coronary Artery Disease is the leading cause of death in the United States. The non invasive detection of Acute Coronary Syndromes (ACS's) remains a clinical challenge. Electrocardiogram (ECG) may only diagnose myocardial infarction in 50 % of the cases. Magnetocardiography is a new and noninvasive method capable of measuring and mapping the magnetic field that is generated during the cardiac cycle. The electric current is affected by ischemic damage, which in turn alters the magnetic field. The magnetic field is not affected by body tissues, unlike the surface current measurements in ECG.
Comparisons: The diagnostic accuracy of the CMI-Magnetocardiograph will be compared to that of the ECG in diagnosing High Risk Unstable Angina.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00169975
|United States, Minnesota|
|Rochester, Minnesota, United States, 55905|
|Principal Investigator:||Peter A. Smars, M.D. EM||Mayo Clinic|