Altogether, approximately 250 remarkable individuals are described. Not only is the book filled with biographies of past pioneers of rhythmology, some of whom lived long ago, but it also includes many contemporary rhythmologists.

In addition to these biographies, it contains:

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• An extensive table of the History of the Disorders of Cardiac Rhythm from the 16th to the 20th century
  
• A series of historical pages developed by the author for every issue of the Journal of Interventional Cardiac Electrophysiology (JICE) and reflecting eminent personalities or events in medicine
  
• A glossary of arrhythmias, electrophysiology and pacing