Which of the following arrhythmias is most likely to be heritable?: (A) Sho Q-T syndrome, (B) Long Q-T syndrome, (C) Ventricular ectopic, (D) WPW Syndrome
Answer is B. Long Q-T syndrome. The genetic basis of heritable arrhythmias, most notably the long Q-T syndromes, has been linked to mutations of genes coding for subunits of cardiac potassium and sodium channeis.