Pacemaker

Definition

A pacemaker is an electronic device that regulates the heartbeat by sending electrical impulses to the heart. It ensures the heart maintains a proper rhythm and rate.

5 Must Know Facts For Your Next Test

1. Pacemakers use direct current (DC) to stimulate heart muscles.
2. The device consists of a pulse generator and leads that transmit electrical signals.
3. Pacemakers often incorporate RC circuits to control the timing of electrical pulses.
4. Battery life is a critical factor, as it determines the longevity of the pacemaker's function.
5. Modern pacemakers can be programmed externally by physicians using magnetic fields.

Review Questions

• What type of current do pacemakers use to stimulate heart muscles?
• How do RC circuits contribute to the functioning of a pacemaker?
• Why is battery life important in the context of pacemakers?

Related terms

RC Circuit: An electrical circuit consisting of resistors (R) and capacitors (C) used to filter signals or store energy.

Direct Current (DC): A type of electrical current that flows in one direction only, commonly used in low-voltage applications like pacemakers.

Capacitor: $A$ device used in electrical circuits for storing charge temporarily, often found in RC circuits.