EKG

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The cardiac conduction system comprises nodes and fibers conducting action potentials through the myocardium, which results in an EKG reflecting the composite activity of the heart. Key EKG components include the P wave, QRS complex, and T wave, each representing critical cardiac cycle phases. Intervals like PR, QT, and ST help assess cardiac function and rhythm. Heart rate is calculated from EKG by analyzing wave patterns over a set time.