Pace Maker
is a balloon placed inside the heart that helps the heart beat.
A defibrilator
yes it can but it may vary
It is called a stethoscope.
Fetal monitors, Doppler fetal monitors, are handheld ultrasound transducers used to detect the heart beat in fetuses. They can be purchased online from DH Gate, Amazon and Baby Center.
Heart rate monitor is personal monitoring device that measure the heart rate in real time (measuring the number of your heart's beat per minute).
it is called tinnitus
it is called tinnitus
Pulse.
It is an electronic device known as a pace-maker.
The heart is not a storage device. IF you're refering to the time between beats, then all 4 chambers sort of "stores" blood to be pumped out at the next beat.
It is called a Irregular heartbeat.