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Doctor insights on: How Do Pacemakers And Defibrillators Work

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How do pacemakers and defibrillators work?

How do pacemakers and defibrillators work?

Heart Rhythm: Pacemakers control the rate of the heart's beat. Defibrillators deliver shock(s) to try to return the heart to a normal rhythm. ...Read more

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Dr. Hirenkumar Italia
2 doctors shared insights

Pacemaker (Definition)

A pacemaker is a device which sends electrical signals to the heart triggering heartbeats when needed. There are many ways to implant and configure a pacemaker; it may beat the top chambers (atria), lower chambers (ventricles) or both. Some systems stimulate both the left and right ventricles together. Pacemakers generally treat abnormally slow heart rhythms and certain ...Read more


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Do defibrillators work in asystole?

Do defibrillators work in asystole?

No: Defibrillators work to disrupt an irregular, rapid, pathological heart beat. They don't "jump start" a heart that is not beating. ...Read more

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How do pacemakers function?

How do pacemakers function?

Pacemaker: When the heart rate slows down to a certain level the the pacer senses this then puts out an electrical impulse to cause the heart to contract. ...Read more

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What things interfere with pacemakers and implantable defibrillators?

What things interfere with pacemakers and implantable defibrillators?

Not much: Common household appliances and cellular phones are generally safe to use near an implantable defibrillator. It is best to avoid sources of significant electric current. For example, you should keep your icd 2 feet from an arc welder. You should not lean over your car engine while it is running. It is best to also keep large magnets off your device as well since this can affect its performance. ...Read more

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How do doctors know how much to charge and shock you with when using a defibrillator?

How do doctors know how much to charge and shock you with when using a defibrillator?

Several factors: Different rhythms tend to require different energies. Otherwise, it depends on defibrillator pad location, patient body habitus/size, and type of cardiomyopathy ...Read more

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What can interfere with pacemakers and implantable defibrillators?

What  can interfere with pacemakers and implantable defibrillators?

Pacemakers: Strong magnetic fields such as those used in security metal detectors and magnetic fields produced by large electric motors can interfere with pacemaker and defibrillator function. They may not necessarily turn a device "off" but can interfere with its programming. With only rare exceptions, patients with these devices need to avoid MRI scanners. Patients with these devices can have ct scans. ...Read more

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What can interfere with pacemakers and implantable defibrillators?

What can interfere with pacemakers and implantable defibrillators?

Pacemakers: Strong magnetic fields such as those used in security metal detectors and magnetic fields produced by large electric motors can interfere with pacemaker and defibrillator function. They may not necessarily turn a device "off" but can interfere with its programming. With only rare exceptions, patients with these devices need to avoid MRI scanners. Patients with these devices can have ct scans. ...Read more

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How do ecg work? What do they do and what heart conditions can an ecg detect? Should everyone get it done?

How do ecg work? What do they do and what heart conditions can an ecg detect? Should everyone get it done?

Electrocardiogram: ECG is essentially a voltmeter, measuring the electrical activity in the heart. The electrical activity in the heart is due to the movement of sodium, potassium, and calcium in and out of the cells, which generate very small amounts of detectible voltage. It is used for to check for heart rhythm problems or for heart attack. Typically only done in people with symptoms of concern. ...Read more

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Holter monitors. How are they used? When do you need one?

Holter monitors.  How are they used?  When do you need one?

Extra beats: They are used to evaluate extra heart beats and fainting spells. They record the heart rate for 24 hours straight. ...Read more

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Why do health clubs have to have those heart machines? Does anyone know how to use them?

Why do health clubs have to have those heart machines? Does anyone know how to use them?

Time is critical: AED is the machine you are talking about. In cases in which someone passes out, the machine can save a life if used quickly and its a heart related problem. Most machines have voice instructions and are easy to use. Just put the pads on the person when prompted and the machine can tell you if you need to hit the button to give a shock. Anyone can use the machines if needed. ...Read more

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How do pacemakers appear?

How do pacemakers appear?

Small implant: It usually appears as a small implant in the left or right upper chest area --. ...Read more

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Why do paramedics use defibrillators with a heart attack patient?

Why do paramedics use defibrillators with a heart attack patient?

Fibrillation : Some patients who suffer a heart attack develop deadly heart rhythms called ventricular tachycardia or fibrillation. The heart does not contract properly under these conditions and without external defibrillation to shock the heart back into normal the patient would die. ...Read more

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How can they do heart transplant?

How can they do heart transplant?

Too broad: Your question is too broad to answer meaningfully. Do you have a specific concern? ...Read more

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How do heart valve replacements work?

Remove/Replace: The heart is stopped. The patient is placed on bypass which pumps blood and breathes for the patient while the heart and lungs are not being used. The old valve is removed and a new valve is stitched in place. This can be either a "tissue valve" from a pig or cow, or a mechanical valve which is completely artificial. ...Read more

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How does the artificial pacemaker work?

How does the artificial pacemaker work?

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

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How do you learn pacemaker implantation programming?

Pacemaker programing: Pacemakers are usually implanted by cardiologists in a special procedure room and there are often technicians that assist with the implantation. These individuals have some background in cardiology and cardiac procedures, or electrophysiology. Pacemaker companies usually recruit technicians or nurses with a cardiology background to train for pacemaker programming. It is a very specialized field. ...Read more

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How effectively do medications work for claustrophobia?

How effectively do medications work for claustrophobia?

Fair: Medications can relieve the symptoms of claustrophobia, but not the cause. Psychotherapy will help you eliminate or cope with the cause of the problem. ...Read more

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How do doctors put pacemakers in?

Carefully!: Most commonly one, two, or three insulated wires are placed through the left or right subclavian vein (runs under the clavicle) using a large bore needle and plastic tubes (sheaths), and then a pocket is created in the area about a half inch below the clavicle where the wires will be connected to the generator and the generator is placed in the pocket and closed. ...Read more

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Do defibrillators work?

Oh yes: Defibrillators are extraordinarily effective devices for the treatment of what would otherwise be fatal lower chamber heart rhythms. That said, they must be used in an extremely timely fashion or their benefits will not prevent irreversible damage from the lack of blood flow seen in these dangerous rhythms. ...Read more

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Dr. Tiffanie Noonan
1 doctor shared a insight

Defibrillator (Definition)

Defibrillation is a common treatment for life-threatening cardiac dysrhythmias, ventricular fibrillation, and pulseless ventricular tachycardia. Defibrillation consists of delivering a therapeutic dose of electrical energy to the affected heart with a ...Read more