What Is A Pacemaker?

A healthy heart beats at a regular rhythm as determined by the body's current condition, such as whether it is in motion or rest, unwell, or in a stressful situation. The heart is signalled through a series of electrical impulses sent by a cluster of cells called the sinoatrial (SA) node, the body's natural pacemaker.

In conditions where the heart cannot maintain a steady rhythm, a small titanium device that functions as an artificial pacemaker is placed under the skin of a patient's chest. This pacemaker, powered by a battery, creates painless electrical impulses, simulating those of the AV node, that signal the heart to beat with a regular rhythm so that blood is pumped correctly throughout the body.

One of three types of heart pacemakers may be suggested by doctors depending on the condition of the heart:

Pacemakers that use one wire lead to thread into the veins of the heart in any of the upper or lower chambers of the heart are called single-chamber pacemakers
A dual chamber pacemaker uses two leads: one in the atria or the upper chamber and another in the ventricle or a lower chamber of the heart
A BVT or a biventricular pacemaker has three wires leading to the right atrium (right upper chamber), the right ventricle (right lower chamber), and the left ventricle (left lower chamber). This artificial pacemaker is usually prescribed in more severe cases and helps the heart's two ventricles to beat in sync.

When Is A Pacemaker Used?

When Is A Pacemaker Used

If your doctor diagnoses an erratic heartbeat, pacemaker implantation may be recommended. It is medically termed arrhythmia, and a pacemaker painlessly sends signals to the heart to ensure it beats and pumps blood at the required pace.

Bradycardia is the most common form of arrhythmia addressed by using a cardiac pacemaker, meaning that the heart beats slower than it should. Tachycardia implies that the heart beats faster than normal, and in such cases, the pacemaker implantation helps stabilise the heart so that it beats more slowly. In patients with more severe heart disease, a dual chamber pacemaker or BVT pacemaker may connect two chambers of the heart so that both beat with the right rhythm and synchronise the blood pumping action.

Arrhythmia May Happen Due To A Few Underlying Causes:

Congenital heart defects (CHD): When a child is born with a heart defect such as a heart block, a pacemaker may be used as part of the treatment. Even as a patient with CHD grows into adulthood, a cardiac pacemaker may be inserted and help with several symptoms of the condition.
Symptomatic sinus node disease: Permanent pacemakers have become more common over the last two decades, especially as the engineering behind them has become more sophisticated and as more recommendations for pacemaker implantation as a preventative measure for further heart health complications from sinus node dysfunction causing arrhythmia, often of the tachy-brady variation.
Hypertrophic cardiomyopathy: (HCM) is a condition in which the heart walls become abnormally thick and unable to contract and release at the right time. A cardiac pacemaker, which has been shown to reduce mortality and symptoms in patients, can help with HCM indications.
Syncope (fainting): Syncope may be caused by various health conditions and results from lowered blood flow to the brain. Suppose this is determined to be happening due to erratic heartbeat. In that case, a pacemaker surgery may be suggested by doctors to ensure a steady pumping action by the heart to ensure adequate blood supply to the brain. More prescriptions for a heart pacemaker for syncopes are happening today because of the low pacemaker cost and simpler implantation.
Congestive heart failure: Heart failure is an inefficient beating of the heart that prevents the blood from carrying adequate nutrition, sugar, and oxygen to the body. It is due to a weakening of the heart muscles. A permanent pacemaker can steady the pumping action.

What Does A Pacemaker Do?

Simply put, a pacemaker prevents mortality and symptomatic concerns arising from heart disease. It stabilises the heart's rhythm on a permanent or temporary basis.

Temporary pacemakers may be used sometimes in case of heart attacks, termed acute myocardial infarction, to stabilise the pace of pumping when drugs and other interventions fail. A transvenous pacemaker, one of the temporary pacemakers commonly used in emergencies, is used on the right side of the heart due to ease of reach, unlike a permanent pacemaker, which is more often implanted in the left. It is threaded into the right atrium or the right ventricle and sometimes into both to stabilise the heart pumping action as the heart fails, mainly due to near-complete blockage.

The complications arising from such a pacemaker operation are minimal compared to other invasive surgeries due to the improvement in precision surgery techniques and pacemaker quality over time.

However, it is not usual to recommend transvenous pacemakers to patients who might have pacemaker surgery for a permanent pacemaker later. The transvenous pacemaker is the more commonly prescribed temporary pacemaker. However, transcutaneous pacing, wherein electrical impulses are sent through the chest, and transesophageal pacing may also be used in acute situations.

Types Of Pacemakers

Natural Pacemaker: The heart already has a pacing system that signals the correct beating rhythm, and this is the AV node. In a healthy body, the heart takes directions from this and maintains regular blood flow and pressure. In case of a heart concern that does not allow the AV node to function efficiently, an artificial pacemaker is used.
Artificial Pacemaker: These are of different types and can be classified as permanent and temporary.
Permanent pacemaker: A permanent pacemaker can be attached to either a single heart chamber, two chambers, or even three heart chambers. These are called single-chamber, dual-chamber, and triple-chamber (biventricular pacemakers). The last one syncs both lower chambers of the heart, and the lead wires connect the pacemaker to both of them and an upper chamber. So, the biventricular pacemaker nomenclature is commonly used for it.

Depending on the severity of the condition and which heart atria or ventricles are most affected, a doctor would recommend pacemaker surgery using one of these devices.

A permanent pacemaker is a suggestion offered for chronic conditions in cases where heart health is often deemed irreversible due to blockage, or arrhythmia is recurrent despite lifestyle changes or therapy. Bradyarrhythmia is the more common concern for which permanent pacemaker implantation is recommended. The device is inserted just below the subcutaneous fat, while the lead wires connect to the heart muscles to be stimulated.

Nowadays, leadless pacemakers are also available and are becoming more recommended by doctors. Medtronic pacemakers can be leadless and have undergone all regulatory approvals. They may be recommended by doctors in certain less severe conditions. The pacemaker risks associated with the insertion of this device are typically very low since the pacemaker is tiny, and the implantation does not require cutting near the chest area. It is usually pushed through a minor cut through the large femoral artery that connects to the heart and is inserted into the right atrium.

Temporary Pacemaker: A temporary pacemaker is always inserted under medical observation. The pacemaker operation happens under controlled clinical conditions when the patient's requirement for an artificial pacemaker is understood to be temporary, and the dysrhythmia is to be resolved soon after. A temporary pacemaker may also be implanted before a permanent one is provided.

Transvenous pacemakers are the more commonly used devices, and a patient remains under observation in a hospital until the time the temporary pacemaker is in the body, after which the catheter is drawn out. Transcutaneous pacing devices, also called external pacemakers, are placed under the skin and deliver electrical impulses to make the heart contract faster. Transesophageal pacing was developed since the upper heart chambers are close to the oesophagus, making it a reasonable location for temporary pacemaker devices. The endocardium is the lining of tissue closest to the heart, and epicardial pacing, commonly used after cardiac surgery, taps into this. The lead wires inserted into the endocardium during heart surgery are affixed to a box device that generates the pulses required to stimulate heart contraction in this type of cardiac pacemaker.

Are You The Right Candidate For A Pacemaker?

If you have any of the indications below, consider getting a doctor's appointment to determine if you need a permanent heart pacemaker. A heart pacemaker surgery is commonly recommended for heart patients who show these symptoms:

Fainting
Dizziness
Lightheadedness
Shortness of breath
Fatigue

Most patients who have had pacemaker surgery today can live healthier, more active lives. With the ease of pacemaker implantation today, more doctors have become comfortable recommending it as a simple solution to prevent further damage to the heart and other vital organs. These may be damaged through incorrect blood, oxygen, sugar, and other nutrients, as is familiar with various forms of heart disease.

Pacemaker implantations have become common with anyone, from newborns to geriatric patients, whenever abnormal heart function is detected. Although pacemaker operations are invasive, they are minimally so, and the body tolerates the device. It is not a sign of ageing if you suffer symptoms such as dizziness and a lack of breath soon after beginning physical activity. It may be reason enough to undergo a pacemaker implantation to prevent further complications.

If indications do not point to severe heart issues, a small, coin-size leadless pacemaker may be recommended for insertion in the heart. The leadless device is a single-chamber pacemaker, though, and cannot resynchronise more than one heart chamber. It is not suggested in case of severe blockages.

A pacemaker implantation may also be done in cases of drug overdose and may involve a temporary pacemaker to stabilise the heart rhythm, especially as the body detoxes.

How Do I Prepare For Pacemaker Surgery?

Especially in cases of temporary pacemaker insertion, the patient does no preparation, and it is immediately executed by doctors in a medical setting as an emergency, either to place a permanent pacemaker later or to remove it later in expectation of a steady heart rhythm after the successful completion of the procedure.

Once the pacemaker surgery is performed successfully, the patient bearing the temporary pacemaker remains under careful clinical observation with heart rates monitored and cannot be released.

Suppose a permanent pacemaker is to be implanted. In that case, the doctor offers a complete checklist of things to be done and avoided by the patient in preparation for surgery after going through a detailed medical history of the individual.

Pacemaker risks remain low, and the preparatory steps are usually uncomplicated and may include:

Not eating or drinking for eight hours before the surgery. It stabilises the blood pressure in most cases, lowering pacemaker risks further.
Use a special soap to disinfect the body area where the pacemaker surgery will happen.
Starting or stopping medication may be recommended by a doctor, depending upon your body's pathophysiology. Medicines that may interfere with pacemaker operation by heightening or subduing blood pressure may be monitored or stopped altogether, and other medication to help the blood circulate more easily may be recommended.

Tests to be performed before pacemaker surgery include:

Electrocardiogram (ECG) test: To understand your heart's impulse generation condition.

Echocardiogram: Involves sound wave reflection to determine the heartbeat and provide the best pacemaker solution for your body

Holter monitoring is done in case the erratic heartbeat occurs outside the hospital. The patient wears the monitor outside the hospital so that abnormal heart rhythms can be picked up throughout the day and all abnormalities are reported.

Pacemaker precautions can include a stress test commonly used to determine heart and blood pressure conditions. An ECG is performed during exercise to determine if the pacemaker implantation is to correct erratic heartbeat only during heightened activity levels.

All these tests are noninvasive and help the doctor offer the most suitable suggestion for each individual, depending on their heart health condition. If necessary, the patient may also request a blood test.

How Is A Pacemaker Surgery Performed?

In most cases, the pacemaker operation is performed while the patient is conscious and under local anaesthesia. The commonly used pacemaker procedure is a transvenous implantation dua ring in which a heart specialist makes a small (around 2-inch) incision close to the heart and inserts the wires from the pacemaker device into a vein that leads to the heart. These lead wires are guided to the heart atria/ventricles and attach to the heart tissue. Fluoroscopy or X-rays are performed to monitor the lead wires' journey to the heart.

The lead wires are connected to the pacemaker at the other end, and then placed inside the body, usually the chest area. During the pacemaker procedure, an IV drip with saline and sedative is also attached to another vein in the arm to relax the body.

A pacemaker surgery where the patient is made unconscious through general anaesthesia is epicardial pacemaker implantation, which is less commonly suggested today. In this case, the pacemaker's lead wires attach to the upper surface of the heart, called the epicardium, and not to the heart chambers directly.

For both pacemaker implantation procedures, the lead wires are tested by the heart specialist or the electrophysiologist to see if they are correctly working before they are attached to the pacemaker box. Small electrical signals are sent to the heart and monitored continuously to see if the pacemaker leads are causing the required contraction. The pacemaker procedure is usually complete within an hour or so, although observation of the patient for 24 hours after the surgery is generally recommended.

Complications And Risks That May Arise

Pacemaker complications are few but may arise due to mechanical failure of the device. The risks of such an incident include:

Collapsing of the lung, medically known as pneumothorax. It may arise due to lead displacement and wrong lodging and may require a further corrective surgical procedure.
The inflammation of the pericardium, which is the sac that protects the heart, is called pericarditis and may sometimes be noted after a pacemaker procedure. It is usually treated through pain medication and antibiotics.
Skin erosion due to faulty pacemaker battery is rare and would require pacemaker replacement and ongoing antibiotic treatment.
Blood clots in the vein are known to occur in some cases after the pacemaker operation. If under medical observation, it is resolved through anticoagulation therapy.
Infections are not very common anymore, considering the lowered pacemaker risks currently, but they may occur and will then be treated through antibiotic usage.
Lead dislodgement may sometimes occur after a pacemaker procedure when the lead wires are dislodged and may move from the heart chamber or endocardium and become loose, causing internal injury.

How Do I Recover From A Pacemaker Surgery?

Recovery after pacemaker surgery requires rest for a few weeks, and your doctor may recommend a diet. A few simple precautions can go a long way in aiding recovery after pacemaker implantation.

Precautions To Take After A Pacemaker Surgery

A pacemaker surgery usually requires the patient to be under medical observation for a day, after which a few precautions are suggested:

Heavy lifting and other strenuous activity should be avoided, and a doctor will suggest this after a pacemaker operation
Regular health checks are recommended so that all signs that may or may not be symptomatic are seen with immediacy and are preventative after a pacemaker operation
Be careful about medication, and recreational drug usage may be forbidden by your doctor
Light exercises such as walking may be recommended after two weeks of rest
Tight clothing over the pacemaker device should be avoided

Pacemaker Faqs: All Your Concerns Addressed

Q. How long does a pacemaker battery last?
A. A permanent pacemaker battery lasts for 10-15 years, and a replacement will only be necessary in case of mechanical failure of the device. A doctor will prescribe the pacemaker to last for a certain number of years, and it is advisable to schedule a checkup during the suggested battery exhaustion, along with regular health checkups.

Q. Do metal detectors, microwaves, or other appliances impact my pacemaker?
A. Metal detectors do not harm the pacemaker but do detect metal. If the sensor signals metal in your body, please inform security about your having undergone a pacemaker operation. Most household appliances do not affect the pacemaker, but avoiding devices with strong electromagnetic fields, such as large stereo systems, is advisable.

Q. How does a pacemaker system get implanted?
A. Pacemaker system get implanted:

A small incision is made in the upper chest; it's 5cm long.
A thin, insulated wire that's made out of lead is guided through the vein to the heart.
The doctor connects the lead to the pacemaker, and then they program the device.
Once the pacemaker is programmed, it is then inserted beneath the skin
The doctor will check the pacemaker to ensure that it's working properly
Once the checks are positive, the incision is closed

Q. What are the signs that you require a pacemaker?
A. Fatigue, lightheadedness, dizziness, fainting, and exhaustion, even with mild physical activities, are all signs that you need a pacemaker. However, you should check with your doctor immediately because dizziness and fatigue are subjective symptoms.

Q. What is the most common age for getting a pacemaker?
A. Permanent pacemakers are used to manage cardiovascular issues, and surveys have shown that eighty per cent of pacemaker users are senior citizens. The average age is above 75 years.

Q. Can you suffer from a heart attack after implanting a pacemaker?
A. Pacemakers are installed to regulate the heart's rhythm, and they usually eliminate the signs of bradycardia. However, a pacemaker is not an absolute cure for heart disease. It won't prevent or stop heart attacks or any other cardiovascular issues.

Q. Can you feel the pacemaker when it's working?
A. Mostly, patients won't feel when their pacemakers are working. For instance, if you are exercising, then the pacemaker will be able to regulate your heartbeat better and allow blood to flow more efficiently. You may feel that your heart rate has increased because the activity levels have risen, which signifies that your pacemaker is at work.

Q. Is it safe to take a flight with a pacemaker?
A. Full-body scanners are considered safe. However, handheld metal detectors do contain magnets that can alter the device settings if the scanner is held over your chest. You can always request a pat-down search or that the handheld detector not be passed over your chest.

Q. What should you avoid once you get a pacemaker?
A. Once you have a pacemaker, you must avoid close or prolonged contact with electrical devices with strong magnetic fields. Devices that can affect a pacemaker are cell phones, MP3 players, and household appliances like microwave ovens.

Q. Do you experience chest pain with a pacemaker?
A. Atherosclerotic coronary artery disease is a very common cause of chest pain. Dual-chamber pacemakers track artery activity by pacing the ventricle. If chest pain occurs even after implanting a pacemaker, you will need medical attention immediately because it signals a severe complication.

Q. How often should you get your pacemaker checked?
A. Once your pacemaker is implanted, you must return for a checkup every six weeks. Checking your pacemaker regularly is important because the adjustments will help prolong its life.