Sparsity-based Magnetic Resonance Imaging of Cardiac Arrhythmias

Inclusion Criteria for Arrhythmia Patients: * Patients diagnosed with heart arrhythmia scheduled for routine clinical MRI examinations). * Patients scheduled for routine clinical MRI examinations who do not have a specific known diagnosis of arrhythmia, but who may be found to have image degradation due to arrhythmia during the CMR examination. Inclusion Criteria for Controls: * No history of heart arrhythmia. Exclusion Criteria for Patients and Controls: * Hemodynamic instability. * Contraindications for MRI examinations (e.g., pacemakers or ferromagnetic vascular clips). * History of prior cardiovascular disease or significant risk factors: * Diabetes, hypertension, smoking, and hyperlipidemia, etc.