pacemaker
pacemaker Lexical Profile
pacemaker Game Scores & Validity
• noun
A small electronic medical device surgically implanted in the chest to regulate the heartbeat through electrical impulses.
"After experiencing an irregular heartbeat, the patient had a pacemaker implanted to stabilize his cardiac rhythm."
A competitor in a middle- or long-distance race who leads early on to establish a fast, steady speed for the other runners, or a person or organization that leads the way in a field.
"The marathon organizers hired an experienced pacemaker to help the elite runners break the course record."
A specialized mass of tissue in the heart, specifically the sinoatrial node, that naturally initiates the electrical impulses controlling the rate of muscular contractions.
"The sinoatrial node acts as the body's natural pacemaker by sending signals that cause the heart chambers to contract."