For most people, the heart’s rhythm is something they are never aware of – a steady, automatic background process that sustains life without any conscious thought. When that rhythm becomes dangerously slow or pauses unexpectedly, the brain and body are deprived of adequate blood flow, and the consequences range from dizziness and fainting to life-threatening collapse.
A pacemaker restores that reliability. It is a small, implanted device that monitors the heart’s rhythm and delivers a small electrical stimulus when the heart rate falls below a set threshold – ensuring the heart beats consistently and adequately, regardless of the underlying electrical disorder.
This guide explains when a pacemaker is needed, what the implantation procedure involves, and what daily life with a pacemaker looks like for Sri Lankan patients.
What Is a Pacemaker?
A pacemaker is a small electronic device, roughly the size of a large coin, that is implanted under the skin near the collarbone. It consists of two main components:
- The pulse generator – the main body of the device, containing a battery and the electronic circuits that monitor the heart’s rhythm and generate electrical impulses when needed
- Leads – thin, insulated wires that connect the pulse generator to the heart muscle. Leads are passed through a vein (most commonly the subclavian vein beneath the collarbone) and positioned in one or more chambers of the heart, where they both sense the heart’s electrical activity and deliver pacing stimuli when required
A pacemaker does not cause the heart to beat at a fixed rate continuously. Modern pacemakers are intelligent devices that monitor the heart’s natural rhythm and intervene only when needed – if the heart’s natural rate falls below the programmed threshold, the pacemaker delivers a stimulus. If the heart’s natural rate is adequate, the pacemaker remains in standby mode.
When Is a Pacemaker Needed?
Pacemakers are used to treat bradyarrhythmias – conditions in which the heart beats too slowly or pauses for periods long enough to cause symptoms or significant haemodynamic compromise.
Sinus Node Dysfunction (Sick Sinus Syndrome)
The sinus node is the heart’s natural pacemaker – the cluster of specialised cells at the top of the right atrium that generates the electrical impulses initiating each heartbeat. When the sinus node fails to generate impulses reliably, or generates them at an inadequately slow rate, the result is sinus node dysfunction – also called sick sinus syndrome.
Presentations include:
- Persistent resting bradycardia (heart rate below 40 to 50 beats per minute)
- Sinus pauses – periods during which the sinus node stops firing, causing the heart to pause for two or more seconds
- Tachy-brady syndrome – alternating periods of fast (typically AF) and slow heart rate, a pattern common in older patients with sinus node dysfunction
- Chronotropic incompetence – inability of the heart rate to increase appropriately with exercise, causing exercise intolerance
Atrioventricular (AV) Block
AV block refers to impaired or absent conduction of electrical impulses from the atria to the ventricles through the AV node. It is classified by severity:
- First-degree AV block – slowed conduction but all impulses reach the ventricles. Does not cause symptoms and does not require a pacemaker
- Second-degree AV block – some impulses fail to reach the ventricles. Mobitz type I (Wenckebach) is usually benign; Mobitz type II carries a significant risk of progression to complete block and usually warrants pacemaker implantation
- Third-degree (complete) AV block – no impulses from the atria reach the ventricles. The ventricles are driven by a slow, unreliable escape rhythm. A medical emergency requiring urgent pacemaker implantation. Causes severe bradycardia, dizziness, fainting, and if untreated, cardiac arrest
Bundle Branch Block Causing Haemodynamic Compromise
The bundle branches conduct electrical impulses to the ventricles. Block of both bundle branches (bifascicular or trifascicular block) causes abnormally slow or absent ventricular activation and may require pacemaker implantation.
Reflex (Neurally Mediated) Syncope
In some patients, fainting is caused by a reflex that causes sudden bradycardia or pauses. In selected patients with frequent, severe, or injury-causing episodes, a pacemaker can reduce episode frequency and severity.
After Cardiac Surgery or Ablation
Some patients develop temporary or permanent conduction disturbances following cardiac surgery or catheter ablation procedures, requiring pacemaker implantation.
What Are the Types of Pacemakers?
Single-Chamber Pacemaker
A single lead is positioned in one chamber of the heart – either the right ventricle (for ventricular pacing) or the right atrium (for atrial pacing in patients with intact AV conduction). Used for specific indications where pacing in one chamber is sufficient.
Dual-Chamber Pacemaker
Two leads are used – one in the right atrium and one in the right ventricle. The device coordinates atrial and ventricular pacing to maintain the normal sequence of heart chambers contracting in the right order. Most commonly used type for AV block and sick sinus syndrome, as it preserves the haemodynamic benefits of coordinated atrio-ventricular contraction.
Rate-Responsive Pacemaker
Modern pacemakers include a sensor that detects physical activity and adjusts the pacing rate accordingly – increasing the heart rate during exercise and reducing it at rest. This restores the normal relationship between physical activity and heart rate that is lost in patients with chronotropic incompetence.
Cardiac Resynchronisation Therapy (CRT) Device
A specialised pacemaker used in heart failure patients with dyssynchronous ventricular contraction (abnormal timing of left and right ventricular contraction caused by left bundle branch block or similar conduction abnormalities). CRT uses three leads – right atrium, right ventricle, and a lead placed in a branch of the coronary sinus to pace the left ventricle – to coordinate ventricular contraction and improve cardiac efficiency.
Often combined with an ICD (implantable cardioverter-defibrillator) in one device (CRT-D) for patients who are also at risk of life-threatening arrhythmias.
Leadless Pacemaker
A newer generation of pacemakers that are implanted directly into the right ventricle through a catheter, without the need for conventional leads and without a generator implanted under the skin. Much smaller than conventional pacemakers – roughly the size of a large capsule – leadless pacemakers offer advantages including absence of a subcutaneous pocket (reducing infection risk) and no visible swelling under the skin.
Currently available as single-chamber devices, making them most appropriate for a specific subset of patients. Leadless dual-chamber systems are in active clinical development.
Subcutaneous ICD (S-ICD)
A defibrillator system where the lead runs under the skin over the breastbone rather than inside a vein in the heart. Detects and treats ventricular arrhythmias without entering the heart, reducing some of the lead-related complications of conventional ICDs. Does not have pacing capability and is not suitable for patients who also need pacing support.
What Does the Pacemaker Implantation Procedure Involve?
Pacemaker implantation is a surgical procedure but is considerably less invasive than open heart surgery. It is performed under local anaesthesia with sedation in a cardiac catheterisation laboratory.
The Procedure
- An incision of approximately 5 cm is made below the collarbone on the left side of the chest (most commonly)
- A vein beneath the collarbone (subclavian or axillary vein) is accessed to allow the lead or leads to be introduced
- The leads are guided under X-ray imaging (fluoroscopy) through the vein and into the heart, where they are positioned and secured at the appropriate site in the right atrium, right ventricle, or both
- Each lead is tested to confirm adequate sensing and pacing thresholds
- The pulse generator is connected to the leads and placed in a pocket created under the skin just below the collarbone
- The incision is closed with sutures
Duration
A single-chamber pacemaker implantation typically takes 30 to 60 minutes. A dual-chamber device takes 60 to 90 minutes. CRT devices or more complex implantations may take longer.
Hospital Stay
Most patients are admitted the day before or the morning of the procedure, and are discharged the following day after a period of observation and a post-implantation chest X-ray and device check.
What Is Recovery Like After Pacemaker Implantation?
Recovery from pacemaker implantation is generally swift compared to major cardiac surgery.
The First Few Days
- The implantation site will be sore and bruised for several days – this is normal
- A sling may be worn for comfort during the first day or two, but prolonged immobilisation of the arm is not necessary and not recommended
- The wound should be kept clean and dry
- Showering is typically permitted after 48 hours; bathing should be avoided until the wound is fully healed
Activity Restrictions in the First Four to Six Weeks
The most important early restriction is avoiding raising the arm on the implantation side above shoulder level, and avoiding heavy lifting or pushing on that side. These restrictions protect the leads while they are securing themselves to the heart wall in the early weeks after implantation.
Specific activities to avoid in the first four to six weeks:
- Raising the arm above the head on the implant side
- Swimming (until the wound is fully healed and arm movement restrictions are lifted)
- Heavy lifting (more than 2 to 3 kg on the implant side)
- Activities involving significant use of the shoulder or chest on the implant side
Return to Normal Activity
Most patients return to light daily activities within a few days. Driving is typically restricted for one week after pacemaker implantation (or longer if the indication was syncope, in which case local driving regulations apply). Return to more physical activity is guided by the device clinic team.
Daily Life With a Pacemaker
For the vast majority of patients, daily life with a pacemaker is entirely normal. The device works silently in the background, doing its job without any sensation that the patient is aware of.
What You Will Notice
- A small visible bulge under the skin below the collarbone where the device is implanted. The size of this is typically similar to a large coin or a thin matchbox
- A small scar at the implantation site
What You Will Not Notice
- The pacemaker delivering its stimulus – the electrical impulse is too small to feel
- The pacemaker sensing your heart rhythm in the background
The Pacemaker ID Card
Every patient receives a pacemaker identification card detailing the device manufacturer, model, serial number, and lead information. Carry this card at all times. It is essential for:
- Airport security – pacemakers will trigger metal detectors. Show the card and explain that you have a cardiac device. Airport security staff are trained in this. You should not walk through metal detector arches – ask for a manual pat-down search instead. Note that full-body X-ray scanners at airports are safe for pacemaker patients
- Medical procedures – any doctor or dentist providing treatment needs to know you have a pacemaker
- Emergency situations – if you need emergency medical care, the card provides critical device information immediately
Activities and Precautions
Exercise and Physical Activity
Patients with pacemakers can and should exercise. Regular physical activity is beneficial for overall cardiovascular health. The rate-responsive function of modern pacemakers adjusts the pacing rate appropriately during exercise. Your device team will advise on any activity-specific restrictions based on the underlying condition and the type of device implanted.
Contact sports and activities with a risk of direct impact to the pacemaker site (such as martial arts, rugby, or cricket) may require specific precautions. Discuss these with your device clinic.
Driving
In Sri Lanka, standard practice follows international guidelines. After pacemaker implantation for AV block or sick sinus syndrome without syncope, a one-week driving restriction is standard. After syncope-related implantation, a longer restriction (typically four weeks or more without a syncopal episode) applies. Commercial driving licences have specific regulations that should be discussed with the treating team.
Work
Return to office-based or sedentary work is typically possible within one to two weeks. Manual or physically demanding work may require a longer period of modified duties, depending on the arm restrictions in the immediate post-implantation period.
Air Travel
Air travel is safe for patients with pacemakers. The low-level electromagnetic radiation from aircraft systems does not affect modern pacemakers. As noted, airport metal detectors should be avoided (use a manual search instead), but full-body scanners are safe. Carry your pacemaker ID card in hand luggage.
Electromagnetic Interference: What to Avoid and What Is Safe
One of the most common concerns for pacemaker patients is electromagnetic interference – whether electronic devices, medical equipment, or industrial machinery might interfere with the pacemaker’s function.
Generally Safe
The vast majority of everyday electronic devices and environments are completely safe for pacemaker patients:
- Mobile phones and smartphones – safe. Use on the ear opposite to the pacemaker side, and do not carry the phone in a breast pocket directly over the pacemaker
- Microwave ovens – safe for domestic use
- Television, radio, computers, tablets
- Standard home electrical appliances
- Airport full-body scanners
- Most dental equipment
Requires Caution or Specific Precautions
- MRI scanning – older pacemakers were not compatible with MRI. Most modern pacemakers are MRI-conditional – meaning MRI can be performed under defined conditions and with specialist oversight. Always confirm MRI compatibility before any MRI scan and inform the radiology team that you have a pacemaker
- Diathermy (surgical electrocautery) – used during surgical procedures. Surgeons must be informed of your pacemaker before any procedure. Programming adjustments may be required
- Transcutaneous electrical nerve stimulation (TENS) – some devices can interfere with pacemaker sensing. Discuss with your device clinic before use
- Strong industrial magnets and large electrical equipment – industrial environments with very high electromagnetic fields require specific assessment
Avoid
- Prolonged close contact with strong magnets (such as those used in some medical or industrial equipment)
- Therapeutic ultrasound (physiotherapy diathermy) – not the same as diagnostic ultrasound, which is safe
- Lithotripsy (shock wave treatment for kidney stones) – requires specific coordination with the device team
When in doubt, inform any healthcare provider that you have a pacemaker before any procedure or treatment.
Follow-Up and Device Monitoring
Pacemaker follow-up is an essential and lifelong part of living with the device. Regular device checks confirm that:
- Battery charge is adequate
- The pacing and sensing functions are working correctly
- The programmed settings remain appropriate for the patient’s current clinical status
- Any stored data – arrhythmia logs, pacemaker utilisation statistics – is reviewed
In-Clinic Device Checks
Typically performed at one month after implantation, then every six to twelve months depending on the device type and battery status.
Remote Monitoring
Modern pacemakers transmit device data wirelessly to a monitoring system, allowing the device clinic team to review device function between in-clinic visits. Remote monitoring has been shown to detect device issues earlier than clinic-only follow-up and significantly reduces the number of in-person visits required.
For Sri Lankan patients who have received pacemaker implantation at Amrita Hospitals, remote monitoring allows ongoing device follow-up to be conducted without requiring return travel to India for every scheduled device check. In-clinic reviews for detailed assessment are planned at intervals agreed with the device team.
Signs That Warrant Prompt Device Clinic Review
- Recurrence of pre-implantation symptoms (dizziness, fainting, breathlessness)
- Visible swelling, redness, or discharge at the implantation site
- The pacemaker ID card app or home monitoring system generating an alert
- Any planned medical procedure involving diathermy or MRI
When Does a Pacemaker Need to Be Replaced?
Battery Life
Modern pacemaker batteries are designed to last between 8 and 15 years, depending on how frequently the device is required to pace. When the battery reaches the end of its life, the generator is replaced in a minor surgical procedure under local anaesthesia. The existing leads are typically left in place and reconnected to the new generator, unless they are found to be dysfunctional at the time of replacement.
Lead Problems
Pacemaker leads can occasionally develop problems – including fractures, insulation breaches, or dislodgement – that require replacement or addition of a new lead. Lead complications are uncommon but are managed by the device team as part of routine follow-up.
Device Upgrade
Some patients who initially receive a single-chamber pacemaker may subsequently require upgrade to a dual-chamber or CRT device if their clinical condition changes. This is planned as a separate procedure.
Why Do Sri Lankan Patients Choose India for Pacemaker Implantation?
- Full range of pacemaker and device systems at Amrita Hospitals, including conventional dual-chamber pacemakers, CRT and CRT-D devices, leadless pacemakers, and subcutaneous ICDs
- Experienced electrophysiology and device implantation team with a high volume of device procedures annually
- Remote monitoring programme – allowing Sri Lankan patients to have ongoing device follow-up managed between Colombo and Kochi without unnecessary travel
- MRI-conditional devices – ensuring that Sri Lankan patients who may need future MRI scans are not restricted by their pacemaker
- One-hour flight from Colombo – making the initial implantation and any subsequent in-clinic reviews genuinely accessible
- Coordinated patient pathway through Amrita Info Centre Sri Lanka
For patients who also have AF or other arrhythmias alongside their bradycardia requiring pacing, our article on heart rhythm disorders and atrial fibrillation treatment for Sri Lankan patients covers the full arrhythmia management programme at Amrita Hospitals.
To explore the complete range of cardiac electrophysiology services available, visit cardiac device and rhythm treatment options in India.
How Do Sri Lankan Patients Access Pacemaker Care at Amrita Hospitals?
- Gather your existing investigations – ECG, Holter monitor results, echocardiography, and specialist letters from cardiologists in Sri Lanka
- Share these with Amrita Info Centre Sri Lanka for forwarding to the electrophysiology and device team at Amrita Hospitals
- Receive an initial assessment confirming the indication for pacemaker implantation and the recommended device type
- Confirm your procedure date and travel arrangements
- Apply for your medical visa with support from our team
For guidance on the visa documentation and application process, our article on the Complete Guide to Medical Visa for India from Sri Lanka covers every step.
For a complete checklist of all documents to prepare before travel, our article on documents you need to travel to India for medical treatment from Sri Lanka provides full guidance.
Frequently Asked Questions
Will I feel the pacemaker working? No. The electrical impulse delivered by the pacemaker is too small to feel. Most patients are completely unaware of the device functioning in their daily life.
Can a pacemaker stop the heart? No. A pacemaker can only stimulate the heart to beat – it cannot stop it. Modern pacemakers are also designed with multiple safety features that prevent them from delivering inappropriate stimuli.
Can I use a mobile phone with a pacemaker? Yes, with a simple precaution. Keep your mobile phone at least 15 cm away from the pacemaker – avoid carrying it in a breast pocket directly over the device. Use the phone on the ear opposite to the pacemaker side. Modern smartphones are safe for pacemaker patients.
Will the pacemaker affect my sex life? No. Sexual activity is safe for patients with pacemakers. There are no restrictions on sexual activity once the initial recovery period and arm movement restrictions have been completed.
What happens if I need an MRI scan? Most modern pacemakers are MRI-conditional – meaning MRI can be performed under defined conditions with appropriate oversight. Always inform the radiology team and your device clinic before any planned MRI. The device may need to be temporarily reprogrammed before the scan. Never proceed with an MRI without first confirming your device’s MRI compatibility.
Does the pacemaker protect against all heart problems? No. A pacemaker treats bradyarrhythmias – abnormally slow heart rates. It does not treat fast arrhythmias (for which an ICD is used), valve disease, coronary artery disease, or other cardiac conditions. Patients with pacemakers still require ongoing management of all other cardiac conditions, including regular follow-up and medication as prescribed.
How will I know when the battery is running low? Battery depletion is detected during routine device follow-up, both through in-clinic checks and remote monitoring. The device does not stop working suddenly when the battery is low – it enters an elective replacement indicator (ERI) mode that signals the need for generator replacement. Generator replacement is planned as an elective procedure well in advance of complete battery depletion.
Conclusion
A pacemaker is one of the most effective and transformative interventions in cardiology. For patients whose quality of life has been significantly affected by dizziness, fainting, or severe fatigue caused by a slow heart rate, pacemaker implantation can restore normal function and independence quickly and reliably.
Living with a pacemaker, for the vast majority of patients, means living normally – with the confidence that the heart’s rhythm is being reliably maintained, and with regular follow-up ensuring the device continues to work as it should.
For Sri Lankan patients who have been advised that a pacemaker may be needed, or who are currently managing symptoms of bradycardia and would like a specialist assessment, Amrita Info Centre Sri Lanka is ready to support the process from Colombo.