PROVIDES PHYSICIANS WITH A CLINICALLY RELEVANT APPROACH TO THE INTERPR ETATION OF ELECTROPHYSIOGRAMS (USED TO MEASURE HEART RHYTHM DISORDERS) . ALSO SERVES AS AN EXCELLENT RESOURCE FOR CANDIDATES TAKING THE ELECT ROPHYSIOLOGY BOARD EXAMINATION. WITH LIBERAL USE OF ILLUSTRATIONS THE TEXT TAKES A CASE STUDY APPROACH TO HELP THE READER RECOGNIZE COMMON A ND UNCOMMON ARRHYTHMIAS, SUCH AS TACHYCARDIA AND BRADYCARDIA.