What is Arrhythmia?
An arrhythmia occurs when the electrical impulses that coordinate heartbeats do not function properly, causing the heart to beat too fast (tachycardia), too slow (bradycardia), or in an irregular pattern. This disruption can originate in different parts of the heart and varies widely in its severity and impact on health.
Some arrhythmias are detected only during a routine examination and cause no symptoms. Others produce noticeable symptoms and require medical management or procedural intervention to prevent serious complications such as stroke, heart failure, or cardiac arrest.
Types of Arrhythmia
Not all arrhythmias are the same. The treatment approach depends on the type, location of origin, and the underlying cause.
Atrial Fibrillation (AFib)
The most common type, where the upper chambers of the heart beat chaotically and out of coordination with the lower chambers. It significantly increases the risk of stroke and heart failure.
Atrial Flutter
Similar to AFib but with a more organised, rapid rhythm originating in the upper chambers.
Supraventricular Tachycardia (SVT)
A broad category of fast heart rhythms originating above the ventricles, causing sudden episodes of rapid heartbeat.
Ventricular Tachycardia (VT)
A fast rhythm originating in the lower chambers of the heart, which can be life threatening if it leads to ventricular fibrillation.
Ventricular Fibrillation (VFib)
A medical emergency where the lower chambers quiver chaotically instead of pumping blood, requiring immediate intervention.
Bradycardia
An abnormally slow heart rate, often below 60 beats per minute, which can cause fatigue, dizziness, and fainting.
Heart Block
A disruption in the electrical pathway between the upper and lower chambers, slowing or blocking the conduction of impulses.
What are the Symptoms of Arrhythmia?
Arrhythmias may not cause any signs or symptoms. In fact, your doctor might find you have an arrhythmia before you do, during a routine examination. Noticeable signs and symptoms don’t necessarily mean you have a serious problem, however.
Noticeable arrhythmia symptoms may include:
- A fluttering in your chest
- A racing heartbeat (tachycardia)
- A slow heartbeat (bradycardia)
- Chest pain
- Shortness of breath
Other symptoms may include:
- Anxiety
- Fatigue
- Lightheadedness or dizziness
- Sweating
- Fainting (syncope) or near fainting
If you experience sudden chest pain, loss of consciousness, or severe breathlessness, visit a cardiologist as soon as possible.
What are the causes of Causes and Risk Factors?
Arrhythmias can arise from a variety of underlying conditions affecting the heart’s structure or electrical system, as well as from lifestyle and external factors.
Medical causes:
- Coronary artery disease and prior heart attack
- Cardiomyopathy or structural changes to the heart
- High blood pressure (hypertension)
- Heart valve disease
- Congenital heart defects
- Overactive or underactive thyroid gland
- Electrolyte imbalances (low potassium, magnesium, or sodium)
- Obstructive sleep apnea
- Diabetes
Factors that increase your risk of developing peripheral artery disease include:
- Smoking
- Drinking too much alcohol or caffeine
- Drug abuse
- Stress or anxiety
- Certain medications and supplements, including over-the-counter cold and allergy drugs and nutritional supplements
- Genetics
How is arrhythmia diagnosed?
Accurate diagnosis is essential before any treatment is planned. Our cardiologists uses a combination of non-invasive and invasive diagnostic tools to identify the type, origin, and severity of arrhythmia in each patient.
Electrocardiogram (ECG)
The first line investigation, recording the heart’s electrical activity to detect rhythm abnormalities.
Holter Monitor
A portable ECG device worn for 24 to 48 hours to capture intermittent arrhythmias that may not appear during a standard ECG.
2D Echocardiography
Ultrasound imaging to assess heart structure, wall motion, and pump function as contributing factors.
Stress Test (TMT)
Evaluates heart rhythm changes during physical exertion, identifying exercise induced arrhythmias.
Electrophysiology Study (EPS)
An invasive procedure where catheters are guided to the heart to map its electrical pathways, precisely locating the source of abnormal rhythms.
How is arrhythmia treated?
The treatment approach for arrhythmia depends on the type of rhythm disorder, its severity, and the patient’s overall cardiac health. Not all arrhythmias require intervention. For those that do, our cardiologists offers a comprehensive range of medical and procedural treatments.
Medications
Antiarrhythmic medications are used to control heart rate, restore normal rhythm, or reduce the risk of blood clots in conditions like atrial fibrillation. These include rate control agents, rhythm control agents, and anticoagulants. All medications are prescribed and monitored carefully based on each patient’s specific condition.
Cardioversion
For certain arrhythmias including atrial fibrillation and atrial flutter, cardioversion is used to restore a normal heart rhythm. This can be achieved through controlled electrical shock delivered via paddles or patches on the chest, or through specific medications. The procedure resets the heart’s electrical activity and is performed under close monitoring.
Catheter Ablation
In catheter ablation, thin flexible wires are guided through the blood vessels to the heart. The tip of the catheter delivers energy – radiofrequency, heat, or extreme cold to destroy the small area of tissue responsible for the abnormal electrical signals. This procedure can be curative for many types of arrhythmia, including SVT and atrial flutter.
Pacemaker Implantation
For patients with bradycardia or heart block, a pacemaker is implanted to monitor the heart’s rhythm and deliver electrical impulses when the heart beats too slowly or stops. It is a small device placed under the skin near the collarbone, connected to the heart via thin wires.
Implantable Cardioverter Defibrillator (ICD)
For patients at risk of life-threatening ventricular arrhythmias, an ICD is implanted similarly to a pacemaker. It continuously monitors the heart rhythm and delivers a controlled shock to reset the heart if a dangerous arrhythmia is detected, potentially preventing sudden cardiac death.
Prevention of Arrhythmia
While not all arrhythmias can be prevented, a heart-healthy lifestyle significantly reduces the risk of developing cardiac rhythm disorders.
- Maintain a balanced diet low in saturated fats and high in fruits and vegetables
- Exercise regularly and maintain a healthy body weight
- Quit smoking and limit alcohol and caffeine intake
- Manage underlying conditions such as high blood pressure, diabetes, and sleep apnea
- Reduce chronic stress through structured relaxation and healthy sleep habits
- Avoid self-medication with over-the-counter stimulants and cold preparations
Frequently Asked Questions
Is arrhythmia a serious condition?
Not all arrhythmias are dangerous. Some are harmless, while others like ventricular fibrillation and certain types of atrial fibrillation can be life threatening and require prompt medical attention.
What is the most common type of arrhythmia?
Atrial fibrillation is the most common type of arrhythmia, where the upper chambers of the heart beat chaotically. It significantly increases the risk of stroke and requires structured long term management.
Can arrhythmia be cured permanently?
Some arrhythmias can be cured with catheter ablation. Others are managed long term with medications or implanted devices like pacemakers or ICDs depending on the type and underlying cause.
How is arrhythmia diagnosed at Swasthyam Hospital?
Diagnosis includes ECG, Holter monitoring, 2D echocardiography, stress testing, and in some cases an electrophysiology study to precisely locate the source of the abnormal rhythm.
When should I see a cardiologist for a heart rhythm problem?
Consult a cardiologist if you experience recurrent palpitations, episodes of fainting, unexplained breathlessness, or chest discomfort. Sudden severe symptoms require immediate emergency care.
Is catheter ablation safe?
Yes. Catheter ablation is a well established minimally invasive procedure performed by experienced interventional cardiologists. It carries a high success rate for many types of arrhythmia and avoids the need for open-heart surgery.