Magnetic resonance imaging mapping of ventricular tachycardia in patients with different cardiomyopathies (arrhythmogenic right ventricular dysplasia, amyloidosis, etc.)

Cardiac magnetic resonance (CMR) has emerged as an excellent tool for the diagnosis and evaluation of cardiomyopathies. Understanding the myocardial substrate is critical for ventricular arrhythmia risk stratification and preprocedural ventricular tachycardia (VT) ablation planning. This chapter discusses the current knowledge and application of CMR in the diagnosis, prognostication, and treatment of ventricular arrhythmias in the setting of structural heart disease. Ischemic cardiomyopathy, or left ventricular dysfunction secondary to coronary artery disease, is the most common cause of heart failure. Integration of CMR with invasive electroanatomical mapping has been shown to be feasible and valuable in identifying areas of scar that is important for sustaining VT in a number of different cardiomyopathies. The cardiomyopathies include ischemic heart disease, non-ischemic cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy, hypertrophic cardiomyopathy, cardiac amyloid and Chagas disease.