The R12 and R14 waves hold the key to the answer (Figures 2 and 3). These two QRS complexes are narrow and occur slightly earlier than others. They are PJCs and occur late enough to have a sinus P ...
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 ...
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