Examlex
How can scientific studies control for the Hawthorne effect, placebo effect, and researcher bias?
Diastole
The phase of the cardiac cycle during which the heart relaxes and fills with blood after contraction.
Electrocardiogram
A test that measures the electrical activity of the heart to show whether or not it is working normally.
P Wave
First complex of the electrocardiogram representing depolarization of the atria.
Atrial Depolarization
The electrical activation of the atria of the heart, leading to atrial contraction and the initiation of the heartbeat.
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