Which device delivers electrical impulses to the heart when the SA node is unable to?

Which device delivers electrical impulses to the heart when the SA node is unable to?

• A. Defibrillator
• B. Pacemaker
• C. Stent
• D. Leads

Answer: (B)

When the SA node can’t generate the regular electrical impulses that coordinate the heart’s rhythm, an artificial pacemaker provides those impulses to stimulate heartbeats and keep the heart rate steady. The device is implanted under the skin and connected to the heart with leads, delivering timed electrical signals to the atria and/or ventricles to maintain proper rhythm and cardiac output. Defibrillators deliver high-energy shocks to reset dangerous rhythms, rather than providing ongoing pacing. Stents are used to open narrowed arteries and have no role in electrical pacing. Leads are just the wires that carry impulses from a pacemaker to the heart and don’t generate impulses by themselves.

When the SA node can’t generate the regular electrical impulses that coordinate the heart’s rhythm, an artificial pacemaker provides those impulses to stimulate heartbeats and keep the heart rate steady. The device is implanted under the skin and connected to the heart with leads, delivering timed electrical signals to the atria and/or ventricles to maintain proper rhythm and cardiac output.

Defibrillators deliver high-energy shocks to reset dangerous rhythms, rather than providing ongoing pacing. Stents are used to open narrowed arteries and have no role in electrical pacing. Leads are just the wires that carry impulses from a pacemaker to the heart and don’t generate impulses by themselves.