Examlex
State the four steps of the scientific method.
P Wave
A feature of the ECG that represents the electrical activity associated with the depolarization of the atria of the heart.
Atrial Depolarization
The electrical activation of atrial myocardium (heart muscle) that leads to the contraction of the atria, marked as the P wave on an electrocardiogram (ECG).
Electrocardiogram
A diagnostic test that measures the electrical activity of the heart to identify various heart conditions.
Semilunar Valves
Valves located at the exits of the heart, preventing blood from flowing back into the ventricles from the arteries.
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