The Electrocardiogram Basics
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In an ECG, what does the P wave represent?
atrial depolarization (contraction)
What does an ECG measure?
the spread of electrical activity through the heart
What is an ECG used for?
to diagnose abnormal heart rates, arrhythmias, and damaged heart muscle
In an ECG, what does the QRS wave represent?
ventricular depolarization (contraction) and atrial relaxation
In an ECG, what does the T wave represent?
ventricular repolarization (relaxation)
