Examlex
Use the figure below to find the exact value of the given trigonometric expression.
Pacemaker
An electronic medical device implanted in the chest to regulate the heartbeat, used in conditions where the heart's natural rhythm is too slow.
Atria
The atria are the two upper chambers of the heart, responsible for receiving blood from the veins and pumping it into the ventricles, which then circulate it to the lungs and the rest of the body.
Ventricles
Hollow chambers within the brain that produce cerebrospinal fluid, or within the heart that pump blood throughout the body.
ECG
An abbreviation for Electrocardiogram, a test that measures the electrical activity of the heart to show whether it is working normally.
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