ventricular arrhythmia treatmentleft ventricular dysfunctionleft ventricular hypertrophy treatmentright ventricular infarctionfibrosis ventricularventricular atrophyright ventricular heaveright ventricular dysplasiaventricular diastolic dysfunctionprobable left ventricular hypertrophyventricular systolic dysfunctionleft ventricular systolic function