Rhythm Puzzles

These Rhythm Puzzles have been published in the Netherlands Heart Journal and are reproduced here with permission from the publisher, Bohn Stafleu Van Loghum.

• A fainting lady with some extrasystoles
• One to one, one to two, two to one? What is the rhythm?
• An irregular rhythm at older age
• Tachycardia terminated by adenosine
• Nightly phenomena, day time work?