Electrical disorders of the heart.
D001145:Arrhythmias, Cardiac / Q000209:etiology; D009202:Cardiomyopathies / Q000209:etiology; D006327:Heart Block / Q000209:etiology; D006329:Heart Conduction System / Q000503:physiopathology*; D006331:Heart Diseases / Q000209:etiology*; D006801:Humans; D013614:Tachycardia, Paroxysmal / Q000209:etiology; D014927:Wolff-Parkinson-White Syndrome / Q000209:etiology