When is it necessary to implant a pacemaker?

A pacemaker is necessary when the heart's electrical system cannot maintain a safe heart rate on its own, causing symptoms such as fainting, severe dizziness, or breathlessness. Common triggers include symptomatic bradycardia, second- or third-degree heart block, and sick sinus syndrome. The decision is based on symptoms, ECG findings, and the results of monitoring tests such as a Holter recording.

Who is not suitable for a pacemaker?

Pacemakers are not indicated for patients whose slow heart rate is caused by a reversible condition — such as certain medications, electrolyte imbalances, or hypothyroidism — that can be corrected without a device. Patients with life-threatening fast rhythms (ventricular tachycardia or fibrillation) typically require an ICD rather than a standard pacemaker. Your cardiologist will confirm suitability after a full assessment.

How serious is implanting a pacemaker?

Pacemaker implantation is a minimally invasive procedure performed under local anaesthesia, not open-heart surgery. Serious complications are uncommon but can include infection, lead displacement, or bleeding at the implant site. Most patients are discharged within one to two days and resume light activities within a week. Your cardiologist will discuss individual risks based on your medical history before the procedure.

How long does it take to recover from a pacemaker implantation?

Most patients return home within one to two days of the procedure. Light activities such as walking can usually resume within a week. Lifting heavy objects or raising the arm on the implant side above shoulder height is typically restricted for four to six weeks while the leads stabilise. Full recovery and return to normal daily activities generally occur within four to eight weeks, depending on the individual.

What should you avoid after pacemaker implantation?

In the weeks following implantation, avoid heavy lifting, vigorous arm movements on the implant side, and contact sports until cleared by your cardiologist. Strong magnetic fields — such as those from MRI scanners (unless you have an MRI-conditional device), industrial welding equipment, and certain security systems — should be discussed with your care team. Always inform healthcare providers and airport security staff that you have a pacemaker.

How long does a pacemaker last before it needs replacing?

Most modern pacemaker batteries last between eight and fifteen years, depending on the device model and how frequently it paces. The generator is replaced in a straightforward procedure when the battery nears depletion; the existing leads are usually retained. Regular follow-up appointments and remote monitoring allow the cardiology team to track battery status and plan replacement well in advance.

Who Needs a Pacemaker? Patient Guide

What is a pacemaker and who needs one?

A pacemaker is a small electronic device implanted under the skin of the chest to regulate an abnormally slow or irregular heartbeat. It is recommended for patients with bradycardia, heart block, or certain arrhythmias where the heart's natural electrical system fails to maintain a safe rhythm. S.L. Raheja Hospital in Mumbai offers pacemaker implantation through its Cardiology programme at Mahim West.

Tip: A pacemaker does not treat coronary artery disease or heart failure on its own — it specifically addresses electrical rhythm problems. Always confirm the underlying diagnosis with a cardiologist.

The device continuously monitors the heart's rhythm and delivers a small electrical impulse only when needed, keeping the heart beating at a safe rate. Modern pacemakers are compact, long-lasting, and compatible with most everyday activities.

What conditions require a pacemaker?

A cardiologist considers pacemaker implantation when the heart's electrical conduction system is unable to maintain an adequate heart rate or rhythm on its own. The following conditions most commonly lead to this recommendation:

Bradycardia — a resting heart rate consistently below 40–50 beats per minute causing symptoms such as dizziness, fainting, or fatigue.
Sick sinus syndrome — the sinoatrial node (the heart's natural pacemaker) fires too slowly, too fast, or irregularly.
Heart block (AV block) — the electrical signal between the upper and lower chambers is delayed or completely blocked; second-degree and third-degree heart block typically require a pacemaker.
Atrial fibrillation with slow ventricular response — when AF is accompanied by an excessively slow heart rate.
Neurocardiogenic syncope (vasovagal syncope) — recurrent fainting episodes caused by sudden drops in heart rate, in selected cases.
Post-cardiac surgery or ablation — when the procedure affects the heart's conduction system.
Congenital heart conditions — certain structural defects that impair normal electrical conduction from birth.

A pacemaker is not indicated for every arrhythmia. Conditions such as ventricular fibrillation or sustained ventricular tachycardia are more appropriately managed with an implantable cardioverter-defibrillator (ICD) or a combination device.

What symptoms suggest you may need a pacemaker?

Symptoms arise because the brain and other organs are not receiving sufficient blood flow when the heart beats too slowly or pauses. Recognising these warning signs early allows timely evaluation.

Symptom	What it may indicate
Unexplained fainting (syncope)	Sudden drop in heart rate reducing blood flow to the brain
Persistent dizziness or light-headedness	Inadequate cardiac output, especially on exertion
Unusual fatigue or breathlessness	Heart unable to increase rate to meet the body's demands
Palpitations or irregular heartbeat	Erratic electrical signals from a dysfunctional sinus node
Chest discomfort at rest or with mild activity	Reduced cardiac output affecting myocardial perfusion
Confusion or memory lapses in older adults	Chronic low cerebral blood flow from slow heart rate

Warning: If you experience sudden loss of consciousness, chest pain, or a heart rate below 40 beats per minute, seek emergency medical attention immediately. Do not wait for a scheduled appointment.

How is a pacemaker implanted?

Pacemaker implantation is a minimally invasive procedure typically performed under local anaesthesia with sedation. It is not open-heart surgery. The steps below outline the standard process:

Pre-procedure assessment — ECG, Holter monitoring, echocardiogram, and blood tests confirm the diagnosis and guide device selection.
Anaesthesia and preparation — The chest area below the collarbone is cleaned and numbed with local anaesthetic. Sedation keeps the patient comfortable.
Lead placement — One or more thin, flexible wires (leads) are guided through a vein into the appropriate heart chamber(s) under X-ray (fluoroscopy) guidance.
Device implantation — The pacemaker generator (battery and circuitry) is placed in a small pocket created just beneath the skin below the collarbone.
Testing and closure — The device is programmed and tested to confirm correct sensing and pacing. The incision is closed with sutures or surgical glue.
Monitoring — Patients are observed overnight or for 24 hours before discharge in most cases.

The procedure typically takes one to two hours. Most patients return home within one to two days and resume light activities within a week.

What is the difference between a pacemaker and an ICD?

Both devices are implanted in the chest and use electrical impulses to manage heart rhythm, but they serve different purposes. Understanding the distinction helps patients ask informed questions during their cardiology consultation.

Feature	Pacemaker	ICD (Implantable Cardioverter-Defibrillator)
Primary function	Prevents heart rate from going too slow	Detects and terminates life-threatening fast rhythms (VT/VF)
Electrical output	Low-energy pacing impulses	Low-energy pacing plus high-energy shock if needed
Main indication	Bradycardia, heart block, sick sinus syndrome	Ventricular tachycardia, ventricular fibrillation, sudden cardiac arrest risk
Device size	Smaller generator	Slightly larger generator due to defibrillation capacitor
Combination devices	CRT-P (cardiac resynchronisation + pacing)	CRT-D (cardiac resynchronisation + defibrillation)

Some patients require a device that combines both functions. Your cardiologist will recommend the appropriate device based on your diagnosis, heart function (ejection fraction), and risk profile.

When should you see a cardiologist about a pacemaker?

Seek a cardiology evaluation promptly — not at a routine check-up — if you experience any of the following:

Fainting or near-fainting episodes occurring more than once, or even a single episode without a clear cause.
A resting heart rate consistently below 50 beats per minute confirmed on a home pulse check or wearable device.
Dizziness or breathlessness that limits your ability to climb stairs or walk short distances, persisting for more than two weeks.
A documented ECG finding of second-degree or third-degree heart block, even if currently without symptoms.
Palpitations accompanied by pre-syncope (feeling you are about to faint) at any time.
An existing pacemaker that is approaching its projected battery end-of-life, or any alert from a remote monitoring system.

Tip: Bring a printed or digital copy of any ECG, Holter report, or echocardiogram to your first consultation. This allows the cardiologist to assess rhythm data immediately rather than repeating tests.

How does S.L. Raheja Hospital support patients needing a pacemaker?

S.L. Raheja Hospital in Mumbai, located at Mahim West, provides Cardiac Science services that include evaluation, implantation, and follow-up care for patients with bradycardia, heart block, and related rhythm disorders. The cardiology team manages the full pathway — from diagnostic Holter monitoring and electrophysiology assessment through to device implantation and long-term device checks.

Patients requiring more complex interventions, such as TAVI/TAVR for valve disease or heart valve replacement or repair, can access those services within the same hospital, reducing the need for multiple referrals.

To discuss whether a pacemaker or ICD is appropriate for your condition, use the booking form on this page to request a cardiology consultation, or write to info@rahejahospital.com.

Book a consultation at S.L. Raheja Hospital

Use the booking form on this page, or reach out directly:

Email: info@rahejahospital.com

A pacemaker is necessary when the heart's electrical system cannot maintain a safe heart rate on its own, causing symptoms such as fainting, severe dizziness, or breathlessness. Common triggers include symptomatic bradycardia, second- or third-degree heart block, and sick sinus syndrome. The decision is based on symptoms, ECG findings, and the results of monitoring tests such as a Holter recording.
Pacemakers are not indicated for patients whose slow heart rate is caused by a reversible condition — such as certain medications, electrolyte imbalances, or hypothyroidism — that can be corrected without a device. Patients with life-threatening fast rhythms (ventricular tachycardia or fibrillation) typically require an ICD rather than a standard pacemaker. Your cardiologist will confirm suitability after a full assessment.
Pacemaker implantation is a minimally invasive procedure performed under local anaesthesia, not open-heart surgery. Serious complications are uncommon but can include infection, lead displacement, or bleeding at the implant site. Most patients are discharged within one to two days and resume light activities within a week. Your cardiologist will discuss individual risks based on your medical history before the procedure.
Most patients return home within one to two days of the procedure. Light activities such as walking can usually resume within a week. Lifting heavy objects or raising the arm on the implant side above shoulder height is typically restricted for four to six weeks while the leads stabilise. Full recovery and return to normal daily activities generally occur within four to eight weeks, depending on the individual.
In the weeks following implantation, avoid heavy lifting, vigorous arm movements on the implant side, and contact sports until cleared by your cardiologist. Strong magnetic fields — such as those from MRI scanners (unless you have an MRI-conditional device), industrial welding equipment, and certain security systems — should be discussed with your care team. Always inform healthcare providers and airport security staff that you have a pacemaker.
Most modern pacemaker batteries last between eight and fifteen years, depending on the device model and how frequently it paces. The generator is replaced in a straightforward procedure when the battery nears depletion; the existing leads are usually retained. Regular follow-up appointments and remote monitoring allow the cardiology team to track battery status and plan replacement well in advance.

What Is a Pacemaker and Who Needs One? A Patient Guide