In addition to the normal recommendations for ICD use in patients with dilated cardiomyopathy and left ventricular ejection fraction of < 35% and in patients with sustained VT / VF or resuscitated cardiac arrest, placement of an ICD may also be useful (class IIa recommendation) for patients with lamin A / C cardiomyopathy who have unexplained syncope, an independent indication for a permanent pacemaker, or two or more other risk factors for sudden death (intermediate left ventricular ejection fraction in the range of 35% to 44%, male gender, non-sustained ventricular tachycardia, non-missence mutations).