also: ペースメーカ
noun
pacemaker (medical device)
Refers to the implanted cardiac device that regulates heartbeat.
祖父は心臓にペースメーカーを入れている。
My grandfather has a pacemaker in his heart.
noun
pacesetter; pacemaker (runner)
Used in sports, especially running, for a person or competitor who sets the pace.
In a marathon, the pacemaker leads the front group.