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Table 1 Suggested timeline for CMR exams by expert consensus based on common clinical indications (not intended to be exhaustive and individual clinical circumstances need to be considered)

From: Society for Cardiovascular Magnetic Resonance (SCMR) guidance for the practice of cardiovascular magnetic resonance during the COVID-19 pandemic

 Elective (wait 2–4 months)Semi-urgent (1 week – 2 months)Urgent (< 1 week)
CardiomyopathySuspected hypertrophic cardiomyopathy or follow-up for late gadolinium enhancement
Family history of sudden death, arrhythmogenic cardiomyopathy, or other screening in clinically stable and asymptomatic patients
Suspected dilated cardiomyopathy to assess LV function and etiology
Suspected infiltrative cardiomyopathy, depending on impact on treatment
Follow-up of iron overload pending chelation therapy
Family history of sudden death, arrhythmogenic cardiomyopathy, or other screening in symptomatic patients
Acute myocarditis with implications for immediate management (within 1–3 days)
Ischemic heart diseaseStress perfusion in stable ischemic heart disease
Viability for non-urgent revascularization
Stress perfusion in newly symptomatic patients
Viability for revascularization in patients with recent symptoms
Ischemia and viability to guide urgent revascularization
MassesSuspected benign mass, unlikely to prompt urgent surgery or biopsyQuestion of thrombus with non-diagnostic echo and no contraindication to empiric anticoagulationSuspected malignancy, likely to prompt imminent surgery, biopsy, or chemotherapy
Suspected intracardiac mass or thrombus with contraindication to anticoagulation or in patients with suspected embolic events
Congenital heart diseaseFollow-up of right ventricular function and pulmonary regurgitation in a clinically stable patientPre-interventional planning in a symptomatic patientInformation that can only be derived from CMR is needed for decision-making in an acutely ill patient
ArrhythmiaAblation planning for atrial fibrillation in clinically stable patientsAblation planning for ventricular arrhythmias in clinically stable patientsPlanning for urgent ablation in unstable patients
Valvular diseaseFollow up exams in aortic valve stenosis, or quantification of aortic, mitral, tricuspid  or pulmonic regurgitation in clinically stable patientsTranscatheter aortic valve replacement (TAVR) planning pending procedural urgencyTAVR, aortic, mitral, tricuspid, or pulmonic regurgitation quantification, urgent surgery or percutaneous therapy planned
Pericardial diseaseFollow-up for pericarditis in asymptomatic and stable patientsAcute pericarditis evaluation leading to potential change in management in symptomatic patientsPericardial constriction requiring potential urgent surgery
Pulmonary hypertensionEvaluate right ventricular function for escalation of therapy in clinically stable patientsEvaluate right ventricular function for escalation of therapy in symptomatic patients 
Aortic diseaseFollow up dissection and/or aneurysms or repair/coarctation in stable patientsMonitoring of near intervention threshold aneurysms/coarctationSuspected acute dissection (immediately)