Note that you can march out the narrow QRS complexes on the left throughout the duration of the wide complex on the right. The wide complex is simply artifact from patient movement, however may be ...

Note in lead V5 rhythm strip how the amplitude of the QRS complexes vary, however not beat to beat as would be seen in electrical alternans. This variation can occur with the respiratory cycle as the ...

Chest pain and palpitations have become two of the most frequent causes of people rushing to a hospital or typing their symptoms into the search engine. One only needs to feel a sudden chest squeeze, ...

Today, on World Heart Day 2025, understanding the early signs of a heart attack has never been more critical. Chest pain is one of the most common reasons people rush to hospitals, but not all ...

When a heart patient with an implanted pacemakerundergoes electrocardiogram testing,the cardiologist must be able to detect thepresence and effects of the pacemaker (seesidebar, “When the heart’s ...

An electrocardiogram, also called an ECG or EKG, is a simple and painless test that measures the electrical impulses of your heart to check for signs of heart disease. It's done through small ...