- New and updated information across the entire book includes coverage of new pacemaker strips and now includes 12-lead interpretation and 12-lead axis identification. - New cartoons have been added to make key points memorable and entertaining. - Updated algorithms reflect the new 2010 ECC Guidelines. - Completely redesigned Cohn's Pocket Guide for ECG Interpretation, a plastic heart rate ruler, aids both students and practitioners in rhythm interpretation. - Expanded appendix provides illustrations of ECG complexes as they relate to heart damage.