An irregular heartbeat is not always caused by stress or anxiety. Repeated palpitations, unexplained fainting, a very slow heartbeat, breathlessness or sudden episodes of a racing heart may be signs of an electrical problem within the heart.
Patients experiencing these symptoms may need evaluation by a cardiac electrophysiologist, a cardiologist with additional training in diagnosing and treating heart rhythm disorders.
Dr Chandra Mouli S Mantravadi is a Consultant Cardiologist, Electrophysiologist and Cardiac Device Specialist practising at Yashoda Hospitals, Secunderabad. His areas of focused care include irregular heart rhythms, atrial fibrillation, cardiac ablation, pacemakers, implantable cardiac devices and heart failure management. His official hospital profile lists specialised training in cardiac electrophysiology and pacing, heart failure certification from the Heart Failure Association of the European Society of Cardiology, an electrophysiology specialist qualification from the British Heart Rhythm Society and European certification as a cardiac device specialist.
Quick answer: Who should consult an electrophysiologist?
You should consider consulting an electrophysiologist when you have:
- Repeated or prolonged heart palpitations
- A very fast, slow or irregular heartbeat
- Atrial fibrillation or atrial flutter
- Supraventricular tachycardia
- Unexplained dizziness or fainting
- Heart block or symptomatic bradycardia
- Ventricular tachycardia
- A recommendation for cardiac ablation
- A recommendation for a pacemaker, ICD or CRT device
- Heart failure associated with an abnormal heart rhythm
- Problems with an existing pacemaker or cardiac device
Chest pain, severe breathlessness, collapse, sudden weakness, confusion or persistent palpitations accompanied by sweating require immediate emergency medical attention.
What is a cardiac electrophysiologist?
A cardiac electrophysiologist is a cardiologist who specialises in the heart’s electrical system.
The heart does more than pump blood. Every heartbeat begins with an electrical signal. This signal travels through specialised pathways and coordinates the contraction of the upper and lower chambers of the heart.
When these signals begin in the wrong location, travel through an abnormal pathway or move too quickly or too slowly, the patient can develop an arrhythmia.
An electrophysiologist evaluates these electrical abnormalities using tests such as:
- Electrocardiogram
- Holter monitoring
- Extended rhythm monitoring
- Implantable loop recording
- Electrophysiology study
- Device interrogation
- Echocardiography and other cardiac investigations
The specialist then determines whether the rhythm problem requires observation, lifestyle modification, medication, catheter ablation or implantation of a cardiac device.
Why heart rhythm disorders require specialised evaluation
Occasional awareness of the heartbeat can occur in healthy people. However, frequent, prolonged or symptomatic palpitations should not automatically be dismissed as anxiety.
A rhythm disorder may cause:
- A racing or pounding heartbeat
- Fluttering in the chest
- Missed or extra beats
- Shortness of breath
- Chest discomfort
- Weakness or exhaustion
- Dizziness
- Reduced exercise capacity
- Fainting
- Sudden collapse
Different arrhythmias can produce similar symptoms. The correct treatment therefore depends on recording and identifying the rhythm rather than treating symptoms alone.
Some abnormal rhythms are harmless and only require reassurance. Others may increase the risk of stroke, heart failure or sudden cardiac arrest. This is why accurate rhythm diagnosis is the first and most important step.
Conditions Evaluated by an Electrophysiologist
1. Atrial fibrillation
Atrial fibrillation, commonly called AF or AFib, is an irregular rhythm originating in the upper chambers of the heart.
During atrial fibrillation, the atria do not contract in a coordinated manner. Patients may experience a rapid or irregular pulse, palpitations, tiredness, breathlessness, dizziness or reduced exercise capacity. Some people have no obvious symptoms and are diagnosed during a routine examination or ECG.
AFib is clinically important because it can increase the risk of blood clots, stroke, heart failure and other cardiac complications.
Treatment may include:
- Stroke-risk assessment
- Blood-thinning medication when appropriate
- Heart-rate control
- Heart-rhythm control
- Electrical cardioversion
- Antiarrhythmic medication
- Catheter ablation
- Management of hypertension, diabetes, obesity and sleep apnoea
- Long-term rhythm monitoring
The appropriate treatment depends on the patient’s age, symptoms, duration and pattern of AFib, heart structure, stroke risk, other medical conditions and response to previous treatment.
When is catheter ablation considered for AFib?
Catheter ablation may be considered when atrial fibrillation continues to cause symptoms despite medication, when medication is unsuitable or poorly tolerated, or when rhythm control is clinically preferred.
In selected patients with symptomatic and recurrent atrial fibrillation, ablation may also be considered earlier in the treatment pathway. Current European guidance recognises catheter ablation as an important rhythm-control option for appropriately selected patients.
Ablation is not automatically the right treatment for every person with AFib. Individual assessment remains essential.
2. Supraventricular tachycardia
Supraventricular tachycardia, or SVT, is a fast rhythm that generally begins above the lower chambers of the heart.
An episode can begin and stop suddenly. The heartbeat may become extremely fast even when the patient is sitting or resting.
Patients may describe:
- Sudden racing of the heart
- Pounding in the neck or chest
- Breathlessness
- Chest pressure
- Light-headedness
- Weakness
- Anxiety during the episode
An electrophysiology study can help identify the electrical circuit causing SVT. In suitable cases, catheter ablation can target that circuit and may provide long-term rhythm control.
3. Atrial flutter
Atrial flutter is another rhythm disorder affecting the upper chambers of the heart. Although it is different from atrial fibrillation, the two conditions can occur in the same patient.
Atrial flutter may produce a rapid heartbeat, fatigue, dizziness or breathlessness. Treatment can include medication, cardioversion, stroke prevention and catheter ablation depending on the type of flutter and the patient’s overall condition.
4. Premature heartbeats
Premature atrial contractions and premature ventricular contractions are extra beats arising earlier than expected.
Many premature beats are harmless. However, further evaluation may be needed when they are:
- Very frequent
- Associated with dizziness or fainting
- Affecting daily activities
- Occurring in a patient with structural heart disease
- Associated with reduced heart function
Rhythm monitoring helps determine how often the extra beats occur and whether they require treatment.
5. Bradycardia and heart block
Bradycardia means that the heartbeat is slower than expected. A slow heart rate is not necessarily dangerous; trained athletes, for example, may naturally have a lower resting pulse.
Treatment may be needed when a slow heart rate is caused by disease of the heart’s electrical system and produces:
- Fainting or near-fainting
- Fatigue
- Confusion
- Breathlessness
- Reduced ability to exercise
- Long pauses in the heartbeat
Heart block occurs when electrical signals are delayed or interrupted while travelling through the heart. Some patients with symptomatic or advanced heart block may require a pacemaker.
6. Ventricular tachycardia and ventricular fibrillation
Ventricular arrhythmias begin in the lower pumping chambers of the heart.
Some forms of ventricular tachycardia can reduce the heart’s ability to pump blood effectively. Ventricular fibrillation is a medical emergency because the heart can no longer produce an effective heartbeat.
Evaluation may include:
- ECG and rhythm monitoring
- Echocardiography
- Coronary assessment
- Cardiac MRI where appropriate
- Electrophysiology study
- Assessment of heart function
- Evaluation for an ICD
- Catheter ablation in selected patients
7. Unexplained fainting or syncope
Fainting can have neurological, metabolic, vascular or cardiac causes.
A heart rhythm evaluation is particularly important when fainting:
- Occurs during exercise
- Happens without warning
- Causes injury
- Is associated with palpitations
- Occurs in someone with heart disease
- Is associated with a family history of sudden cardiac death
- Remains unexplained after an initial evaluation
Depending on the circumstances, monitoring may be performed using a Holter monitor, event recorder or implantable loop recorder.
Cardiac Tests and Procedures
Electrocardiogram
An ECG records the heart’s electrical activity for a short period. It can detect atrial fibrillation, heart block, previous heart injury and several other electrical abnormalities.
However, an ECG may appear normal when symptoms occur only occasionally. Longer rhythm monitoring may then be needed.
Holter monitoring
A Holter monitor continuously records heart rhythm, usually over one or more days.
Patients are generally asked to note when symptoms occur. The recorded rhythm can then be compared with the symptom diary.
Extended rhythm or event monitoring
When symptoms occur less frequently, a longer monitoring period may provide a better chance of recording the abnormal rhythm.
Implantable loop recorder
A loop recorder is a small monitor placed beneath the skin. It can monitor the heart rhythm over an extended period and may be considered for unexplained, infrequent fainting or suspected intermittent arrhythmias.
Electrophysiology study
An electrophysiology study examines how electrical signals travel through the heart.
Thin catheters are passed through a blood vessel and positioned within the heart. These catheters record electrical activity and may stimulate the heart in a controlled manner to identify the source or circuit responsible for an arrhythmia.
When the abnormal pathway is identified, ablation may sometimes be performed during the same procedure.
Catheter ablation
Catheter ablation is a minimally invasive procedure used to treat selected rhythm disorders.
The electrophysiologist first maps the electrical activity inside the heart. Once the source or pathway responsible for the arrhythmia is located, controlled energy is applied to modify a small area of abnormal heart tissue.
Ablation may be used for conditions including:
- Supraventricular tachycardia
- Atrial flutter
- Atrial fibrillation
- Certain accessory pathways
- Some atrial tachycardias
- Selected ventricular arrhythmias
Catheter ablation is an established treatment for several arrhythmias, but its benefits, risks and expected outcomes vary according to the type of rhythm disorder and the patient’s health.
Pacemaker and Cardiac Device Care in Hyderabad
What is a pacemaker?
A pacemaker is a small implanted device that monitors the heartbeat and provides electrical impulses when the heart is beating too slowly.
A pacemaker may be considered for selected patients with:
- Symptomatic bradycardia
- Sinus node dysfunction
- Advanced heart block
- Long pauses in the heartbeat
- Certain rhythm problems following cardiac procedures
- Specific heart failure indications
A pacemaker does not treat every type of irregular heartbeat. A detailed rhythm assessment is needed before implantation.
What is an ICD?
An implantable cardioverter-defibrillator, or ICD, continuously monitors the heart rhythm.
When it detects a dangerous ventricular arrhythmia, the device can deliver treatment intended to restore a safer rhythm. ICDs may be recommended for selected patients who have survived a life-threatening ventricular arrhythmia or who have a sufficiently high future risk.
What is cardiac resynchronisation therapy?
Cardiac resynchronisation therapy, or CRT, is used in selected heart failure patients whose ventricles do not contract in a coordinated manner.
A specialised device sends electrical signals to help the pumping chambers contract more synchronously. In an appropriately selected patient, CRT may improve symptoms, functional capacity and heart performance. Not every heart failure patient is eligible for CRT.
Why device follow-up is important
Pacemakers, ICDs and CRT devices require periodic assessment.
Device follow-up may include checking:
- Battery status
- Lead function
- Sensing and pacing thresholds
- Stored rhythm episodes
- Percentage of pacing
- Delivered ICD therapies
- Changes in the patient’s clinical condition
New fainting, dizziness, palpitations, shocks from an ICD, swelling or pain around the device site should be reported promptly.
Heart Failure Care and Rhythm Management
Heart failure does not mean that the heart has stopped. It means the heart is not pumping or filling as effectively as the body requires.
Common symptoms can include:
- Breathlessness during activity
- Difficulty breathing while lying flat
- Waking at night with shortness of breath
- Swelling of the feet or legs
- Unusual tiredness
- Reduced ability to exercise
- Rapid weight gain caused by fluid retention
- Persistent cough or wheezing
- Increased heart rate
Heart failure is often a long-term condition, but treatment can reduce symptoms, slow progression and help many patients maintain a better quality of life.
How are heart failure and arrhythmias connected?
Heart failure can increase the likelihood of developing abnormal rhythms. At the same time, persistent fast or irregular rhythms can weaken heart function or worsen existing heart failure.
This relationship is especially important in patients with:
- Atrial fibrillation and reduced heart function
- Frequent ventricular premature beats
- Ventricular tachycardia
- Electrical conduction delay
- A previous cardiac arrest
- Symptoms despite heart failure medication
A specialist with experience in both electrophysiology and heart failure can assess whether the patient requires medication optimisation, rhythm control, catheter ablation, ICD implantation, CRT or another treatment strategy.
Heart failure treatment is individualised
Management may include:
- Evidence-based medications
- Blood-pressure and diabetes control
- Monitoring body weight
- Reviewing salt and fluid intake
- Cardiac rehabilitation
- Treatment of coronary or valve disease
- Rhythm management
- Pacemaker, ICD or CRT in selected patients
- Regular follow-up
- Education about warning symptoms
Patients should not stop heart failure or blood-thinning medication without consulting their treating physician.
Why Patients Consult Dr Chandra Mouli in Hyderabad
Dr Chandra Mouli S Mantravadi’s profile combines cardiology, electrophysiology, cardiac pacing and device care with focused heart failure training.
According to his official hospital profile, his professional qualifications and certifications include:
- DM in Cardiology
- Fellowship in Cardiac Electrophysiology and Pacing
- Heart Failure Certification from the Heart Failure Association of the European Society of Cardiology
- Electrophysiology specialist qualification examination conducted by the British Heart Rhythm Society
- European certification as a cardiac device specialist
- Experience in teaching pacemaker implantation and troubleshooting
- Participation in professional education relating to atrial fibrillation, syncope, ECG and cardiac rhythm management
- Founding involvement in the Andhra Pradesh State Arrhythmia Association
He is listed as a Consultant Cardiologist, Electrophysiologist and Device Specialist at Yashoda Hospitals, Secunderabad, and consults patients in Telugu, Hindi and English.
These qualifications are particularly relevant for patients seeking comprehensive evaluation of an irregular heartbeat rather than symptom-based treatment alone.
What to Expect During an Electrophysiology Consultation
1. Detailed symptom assessment
The consultation may begin with questions such as:
- When did the symptoms begin?
- Do they start and stop suddenly?
- How long does each episode last?
- Is the heartbeat fast, irregular or unusually slow?
- Are the symptoms related to exercise, sleep, meals or stress?
- Is there associated dizziness, fainting, chest pain or breathlessness?
- Has an episode ever been recorded on an ECG or smartwatch?
Patients should bring previous ECGs, Holter reports, echocardiograms, discharge summaries and a current medication list.
2. Review of medical history
Conditions such as hypertension, diabetes, thyroid disease, sleep apnoea, coronary disease, valve disease, kidney problems and previous stroke can influence rhythm treatment.
Family history can also be important, particularly when there has been unexplained fainting, cardiomyopathy or sudden cardiac death.
3. Rhythm documentation
Treatment decisions are safest when the abnormal rhythm is documented. The specialist may recommend an ECG, Holter monitor, longer event monitor or another investigation depending on how frequently symptoms occur.
4. Individual treatment planning
Not every patient with palpitations needs an ablation. Not every slow heartbeat needs a pacemaker. Not every patient with atrial fibrillation requires the same combination of medication and procedures.
The treatment plan should be based on:
- Exact rhythm diagnosis
- Symptom severity
- Frequency and duration of episodes
- Heart structure and pumping function
- Stroke risk
- Existing medical conditions
- Previous treatments
- Patient preferences
- Expected benefits and procedural risks
When Should You Seek Urgent Medical Help?
Seek emergency medical care when palpitations or an abnormal heartbeat are accompanied by:
- Severe chest pain
- Sudden or severe breathlessness
- Fainting or collapse
- New weakness or numbness on one side
- Facial drooping
- Difficulty speaking
- Confusion
- Persistent rapid heartbeat with sweating or weakness
- Multiple ICD shocks
- Loss of consciousness
Online health information cannot determine whether an individual episode is dangerous. When symptoms are severe or rapidly worsening, emergency assessment should not be delayed.
Frequently Asked Questions
Who is the right doctor for an irregular heartbeat?
A cardiologist can perform an initial assessment. When the problem involves recurrent arrhythmia, atrial fibrillation, unexplained fainting, cardiac ablation or a pacemaker, evaluation by a cardiac electrophysiologist may be appropriate.
Is an electrophysiologist different from a cardiologist?
Yes. An electrophysiologist is a cardiologist who has received additional focused training in the diagnosis and treatment of electrical and rhythm disorders of the heart.
Does every patient with palpitations have heart disease?
No. Palpitations can occur because of stress, lack of sleep, caffeine, anaemia, thyroid problems, fever, medication or an arrhythmia. Repeated or concerning symptoms should be investigated rather than assumed to have a particular cause.
Who is an electrophysiologist in Hyderabad for atrial fibrillation?
Dr Chandra Mouli S Mantravadi is a Consultant Cardiologist and Electrophysiologist at Yashoda Hospitals, Secunderabad. His clinical focus includes irregular heart rhythms, atrial fibrillation, pacing, cardiac devices and heart failure care.
Can atrial fibrillation be cured permanently?
Some patients achieve long-term rhythm control after catheter ablation, while others may experience recurrence and require additional treatment. Outcomes depend on the type and duration of AFib, atrial changes, age, weight, sleep apnoea and other medical conditions.
It is generally more accurate to discuss expected rhythm control and recurrence risk than to promise a permanent cure.
Is atrial fibrillation dangerous?
Atrial fibrillation is not always immediately life-threatening, but it can increase the risk of stroke and may contribute to heart failure. Stroke-risk assessment is therefore a central part of AFib management.
Is catheter ablation open-heart surgery?
No. Catheter ablation is generally performed through thin tubes introduced into blood vessels and guided into the heart. It does not normally require opening the chest.
Is catheter ablation painful?
The procedure is performed with anaesthesia or sedation. Some discomfort may occur around the access site or during recovery. The exact anaesthesia plan depends on the procedure and the patient’s condition.
How do I know whether I need a pacemaker?
A pacemaker may be considered when a slow heartbeat or electrical block is documented and is producing symptoms or creating a clinical risk. The decision is based on ECG and rhythm findings, symptoms and the underlying cause.
Can a person live a normal life with a pacemaker?
Many patients return to active lives after pacemaker implantation. Regular follow-up, wound care, device checks and guidance concerning strong electromagnetic sources are important.
What is the difference between a pacemaker and an ICD?
A pacemaker mainly prevents the heartbeat from becoming excessively slow. An ICD can recognise and treat certain dangerous fast rhythms arising from the ventricles. Some devices provide both functions.
Can AFib make heart failure worse?
Yes. A persistently fast or irregular heartbeat may worsen symptoms and heart function in certain patients. Heart failure can also increase the likelihood of AFib. Managing both conditions together can therefore be important.
Should I stop blood thinners after a successful AF ablation?
Not without medical advice. The need for anticoagulation is usually determined by the patient’s stroke-risk profile and not only by whether the heartbeat currently appears normal.
Which tests should I bring to my consultation?
Bring available ECGs, Holter reports, smartwatch recordings, echocardiograms, angiogram reports, blood tests, discharge summaries and a complete medication list.
Where does Dr Chandra Mouli practise?
Dr Chandra Mouli S Mantravadi is listed as practising at Yashoda Hospitals, Secunderabad, Hyderabad. Appointment details and timings should be confirmed directly before visiting.
Consult an Electrophysiologist in Hyderabad
Repeated palpitations, atrial fibrillation, unexplained fainting, a very slow heartbeat or persistent heart failure symptoms deserve a structured evaluation.
Consultation with an electrophysiologist can help answer three important questions:
- What is the exact rhythm problem?
- Is it dangerous or likely to affect heart function?
- Does it require monitoring, medication, ablation or a cardiac device?
Patients looking for an electrophysiologist, atrial fibrillation specialist, pacemaker specialist or heart failure specialist in Hyderabad can consult Dr Chandra Mouli S Mantravadi at Yashoda Hospitals, Secunderabad, subject to current appointment availability.
Book an appointment for evaluation of palpitations, atrial fibrillation, cardiac rhythm disorders, fainting, pacemaker requirements or heart failure symptoms.
Medical disclaimer: This article is for general education and does not replace personalised medical evaluation, diagnosis or emergency treatment.