What are pacemakers?

Speed up heart. If your heart is beating too slow, a pacemaker sends a small electric shock to the heart making it beat faster. There is a batery and some electronic circuits which tell the pacemaker when your heart beats too slow.
Pacemaker. A pacemaker is an electronic device which uses a lead as an antenna to sense the heart's electrical activity. It uses the same lead(s) to deliver a small electrical impulse to the heart to make it contract if the heart isn't going as fast as the device was programmed to maintain. Pacemakers both sense heart activity and pace it to produce activity. They maintain heart rate. Other things too....

Related Questions

What are pacemakers used for?

A few things... Keeping the heart rate from going to slow - in heart block - preventing passing out, changing how the heart muscle contracts to prevent outlow tract obstruction - like in hocm, and occassionally to prevent people from passing out - like in severe neurocardiogenic syncope. Read more...
Pacemaker. A pacemaker is an electronic device which uses a lead as an antenna to sense the heart's electrical activity. It uses the same lead(s) to deliver a small electrical impulse to the heart to make it contract if the heart isn't going as fast as the device was programmed to maintain. Pacemakers both sense heart activity and pace it to produce activity. They maintain heart rate. Other things too.... Read more...

What causes pacemakers to work?

Electrical energy. Electrical energy is stored in within the pacemaker "can" or "generator". At regular intervals, the electrical energy is released through pacemaker leads and reaches the heart. This electrical energy, when applied to the muscle the heart, causes the heart contract. Read more...
Pacemakers. A pacemaker is a battery driven device. It is actually a small computer. Some of its functions are like a radio receiver, its pacing function is just delivering a tiny shock to the heart. A defibrillator delivers a bigger shock to the heart. Read more...

What is a pacemaker?

Heart device. A cardiac pacemaker is a device that is implanted in the chest to permanently regulate heartbeat rhythms. The pacemaker monitors the heartbeat to make sure it is not beating too slowly, and when necessary transmits electric pulses to the heart to increase the heartbeat pace. Pacemakers are periodically replaced every several years when the battery runs out. Read more...
Pacemaker. A pacemaker is an electronic device which uses a lead as an antenna to sense the heart's electrical activity. It uses the same lead(s) to deliver a small electrical impulse to the heart to make it contract if the heart isn't going as fast as the device was programmed to maintain. Pacemakers both sense heart activity and pace it to produce activity. They maintain heart rate. Other things too.... Read more...

What are fixed pacemakers?

Fixed rate. I assume you mean fixed rate pacemakers. We don't use them anymore. The very earliest pacemakers just fired at whatever rate you set them, once a second if you set the rate to 60. That lead to chaos if the patient's inherent heart rate was not always real slow. So they made pacemaker's which sense normal beats and only fire if the rate gets slow. They are inhibited when a heartbeat is sensed. Read more...
Fixed rate pacemaker. These are very old style pacemakers that pace regardless of the intrinsic rate of the heart. Almost all pacemakers are demand pacemakers that only pace when the heart rate gets below a set threshold with sensing. Demand pacemakers can sometimes be temporarily programmed to fixed mode with a magnet applied. Pacers near eol may revert to fixed. Read more...

What people need pacemakers?

HeartRhythm or block. The most common indicators for an implanted pacemaker are bradycardia (slow heart rate), tachycardia (fast heart rate) and heart block (when the heart stops beating for several seconds). Read more...
Slow heart rate. The typical reason to get a pacemaker is slow heart rate *hr), say, below 40 beats a minute. Some people get pacemakers because their hr won't increase with exercise. The most common reason is atrial fibrillation, which can often lead to slow hr. Slow hr causes fatigue or out of breath with exertion or passing out. Some people get special pacemakers to improve heart function if the heart is weak. Read more...

What's a cardiac pacemaker for?

Treating slow rhythm. A pacemaker keeps the heart rate above a certain limit, which is programmable. It cannot treat heart rates that are already too high. Dealing with fast rhythms requires a different approach. Read more...

What is the pacemaker's primary job?

Prevent bradycardia. Most pacemakers are are placed in order to treat excessively slow heart rate (bradycardia). When the heart rate falls below a certain level, the pacemaker is automatically activated at a rate set by the cardiologist. Read more...
Pacemaker. A pacemaker is an electronic device which uses a lead as an antenna to sense the heart's electrical activity. It uses the same lead(s) to deliver a small electrical impulse to the heart to make it contract if the heart isn't going as fast as the device was programmed to maintain. Pacemakers both sense heart activity and pace it to produce activity. They maintain heart rate. Other things too.... Read more...

What are heart pacemakers for?

Regulate heart rate. Most are placed for patients with too slow heart rates, some can deliver shocks (aicd) for patients with rapid heart beats. Rarely used to improve heart pumping function in patients with heart failure. Read more...
Enusure that. Heart rate does not go below a certain rate by paving the right atrium or right ventricle or both (in general). Read more...