“Dr. Kastor has done a great service for patients and their families. In this lucid, comprehensive and well written book, the reader will gain great insight and understanding about electrical disturbances of the heart, which are remarkably common.”

  --Eric J. Topol, MD
  Professor of Cardiology,Case Western Reserve University

“John Kastor has combined extensive clinical experience, great teaching skills, and superb writing to produce a really useful and needed book about heart rhythms. This will help patients and their families to better understand this complex and rapidly changing branch of cardiology.”

—Paul Kligfield, MD, Medical Director, Cardiac Health Center
The New York-Presbyterian Hospital
Professor of Medicine, Weill Medical College of Cornell University