Examlex
List the three arteries that branch off of the aortic arch.
Electrocardiogram
A diagnostic tool that measures and records the electrical activity of the heart to detect abnormalities.
P Wave
The first wave in an ECG, representing the depolarization of the atria before the heart beats.
QRS Complex
Principal deflection in the electrocardiogram, representing ventricular depolarization.
T Wave
Deflection in an electrocardiogram following the QRS complex, representing ventricular repolarization.
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