WEARIT-III is a prospective observational patient registry. Optimal pharmacologic and/or implanted device therapy is anticipated, and the Registry physicians will not be involved in any medical care of the subjects, only collecting information on the standard care of these patients. In WEARIT-III we will also retrieve hospital records/echocardiogram reports of the subjects during follow-up using an authorization form signed by the study subjects and contact their physician to collect information on improvement of the left ventricular function whenever it is available.