What's new in the sixth edition of "How to Read an ECG":

1. Newly described diseases: J-wave syndromes, Brugada syndrome, Short QT interval syndrome, Arrhythmogenic cardiomyopathy, etc. This sixth edition describes how they are recognized on the electrocardiogram.

2. New pacemakers. Pacemakers for Cardiac Resynchronization Therapy (CRT), implantable cardioverter-defibrillators (ICD), etc. have appeared.

3. Due to the emergence of numerous invasive cardiology procedures in Bulgaria, the author focuses in detail on the coronary circulation and how the culprit coronary artery is recognized on the ECG in myocardial infarction.

4. New norms in electrocardiography. During these years, the electrocardiogram has not changed, the methods for its measurement have changed. "In the past, we, the doctors, measured the duration of the waves and complexes manually on the millimeter ECG paper, using a compass, a magnifying glass or an additional ruler if necessary. Today, all modern electrocardiographs are digital and most of them automatically measure the duration and amplitude of the waves and complexes in the electrocardiogram. This necessitated a change in the norms due to the increased accuracy of the measurements. Before the intervention of computers in electrocardiography, such norms were unthinkable."

5. New terms in electrocardiography.

6. New names for old diseases. For example, today, officially, instead of "stable angina", the term "chronic coronary syndrome" is used. The term "non-Q myocardial infarction" was dropped and "Acute coronary syndrome without persistent ST-elevation" appeared, etc.

7. When this textbook first appeared in 1993, due to the economic crisis, the books were printed on cheap paper on outdated printing presses and the illustrations in them were illegible.

Now, for the first time, the new edition is illustrated with real electrocardiograms and in four-color printing, in a convenient format and easy-to-understand design.