The heart beats approximately 100,000 times a day, each beat triggered by an electrical impulse originating in the sinoatrial node and travelling through the conduction system to produce coordinated ventricular contraction. When any part of this system malfunctions like beating too fast, too slow, or in an uncoordinated pattern the result is arrhythmia. Some arrhythmias are incidental findings with no clinical significance. Others cause haemodynamic collapse and cardiac arrest within seconds. The urgency depends not on the label but on whether the rhythm sustains adequate cardiac output and that assessment requires emergency care for arrhythmia.

What is Arrhythmia?

Arrhythmia is any abnormality of cardiac rhythm like rate, regularity, or conduction sequence. The broad categories are:

Tachyarrhythmias: Heart rate above 100 beats per minute. Includes sinus tachycardia, atrial fibrillation (AF), atrial flutter, supraventricular tachycardia (SVT), ventricular tachycardia (VT), and ventricular fibrillation (VF). VT and VF are immediately life-threatening.
Bradyarrhythmias: Heart rate below 60 beats per minute with haemodynamic compromise. Includes sinus bradycardia, sick sinus syndrome, and varying degrees of atrioventricular (AV) block.
Conduction abnormalities: Bundle branch block, Wolff-Parkinson-White syndrome, and long QT syndrome predispose to dangerous arrhythmias.

Common Causes of Arrhythmia

Arrhythmia can occur due to various reasons. These include:

Ischaemic heart disease: myocardial infarction scarring disrupts conduction pathways and cause VT and VF
Hypertension: Chronic high blood pressure overload can cause AF
Cardiomyopathy: Dilated, hypertrophic, or arrhythmogenic right ventricular cardiomyopathy can cause arrhythmia
Electrolyte disturbance: Hypokalaemia, hypomagnesaemia, and hypercalcaemia all alter myocardial electrical stability
Thyroid disease: Hyperthyroidism can trigger tachyarrhythmias
Drug toxicity: Digoxin, antiarrhythmics, antidepressants and QT-prolonging drugs
Stimulant: Excess caffeine, alcohol, cocaine, and amphetamines
Structural heart disease: Valvular disease, congenital abnormalities and post-surgical changes
Channelopathies: Inherited ion channel disorders including long QT syndrome and Brugada syndrome

Warning Signs and Symptoms of Arrhythmia

Symptoms depend on the arrhythmia type and the degree of haemodynamic compromise it causes:

Palpitations as awareness of heartbeat, often described as fluttering, racing, pounding, or skipping is the most common presentation
Chest pain or tightness
Breathlessness
Dizziness or pre-syncope
Syncope or sudden loss of consciousness
Fatigue and reduced exercise tolerance
Sudden cardiac arrest.

Palpitations with dizziness, syncope, chest pain, or breathlessness are warning signs that need irregular heartbeat treatment.

First Aid for Arrhythmia

If conscious and haemodynamically stable:

Vagal manoeuvres: For suspected SVT: Valsalva manoeuvre (bearing down as if straining) or carotid sinus massage by a trained person.
Sit or lie down: Reduce physical exertion and avoid caffeine, alcohol, and stimulants immediately.
Note onset and character: Time of onset, measurable pulse rate, regularity, and associated symptoms. This history speeds emergency triage.
Call emergency services: New-onset arrhythmia, syncope, chest pain, or breathlessness require emergency attendance regardless of apparent stability.

If unconscious or pulseless:

Begin CPR immediately: Thirty compressions to two breaths. Do not wait. VF and pulseless VT are fatal without immediate CPR.
Use an AED if available: Automated external defibrillators are in airports, gyms, and shopping centres. Turn it on and follow audio instructions - designed for non-medical bystanders.
Call emergency services simultaneously: Have a bystander call while CPR continues uninterrupted.

When to Seek Emergency Care for Arrhythmia

Seek heart rhythm emergency care if:

Any arrhythmia with syncope or near-syncope
Palpitations accompanied by chest pain, breathlessness, or dizziness
New-onset rapid or irregular pulse lasting more than 15–30 minutes without resolution
Known arrhythmia with symptoms significantly different from prior episodes
Patient on antiarrhythmic medication with new symptoms
Palpitations in a patient with known structural heart disease, previous cardiac arrest, or family history of sudden cardiac death.

Emergency Treatment at the Hospital for Arrhythmia

The 12-lead ECG is obtained within the first two minutes of arrival and it directs all subsequent management:

Haemodynamically unstable tachyarrhythmia: DC cardioversion (synchronised electrical shock) is the immediate treatment for any tachyarrhythmia causing haemodynamic compromise like VT with pulse, AF with hypotension, or SVT not terminating with pharmacological measures. Performed under brief sedation in the emergency bay.
Ventricular fibrillation / pulseless VT: Unsynchronised defibrillation (200J biphasic) immediately. IV adrenaline 1mg every 3–5 minutes. IV amiodarone 300mg for refractory VF. CPR continued between shocks. Post-resuscitation care in ICU.
Atrial fibrillation: Doctors will give IV medications to control heart rate and rhythm.
SVT: IV antiarrhythmics immediately and repeat if ineffective.
Symptomatic bradyarrhythmia: IV atropine 500 mcg for vagally mediated bradycardia. Temporary cardiac pacing for complete heart block or drug-refractory bradycardia causing haemodynamic compromise.
Electrolyte correction: IV magnesium sulphate for torsades de pointes (polymorphic VT associated with long QT). Potassium and magnesium replacement for hypokalaemia-driven arrhythmias.

Do's and Don'ts During Arrhythmia

Do's:

Stay calm and sit or lie down
Try the Valsalva manoeuvre for SVT if trained and haemodynamically stable
Call emergency services if there is syncope, chest pain, breathlessness, or any doubt
Begin CPR immediately if the patient is pulseless
Use a nearby AED if available and the patient has no pulse

Don'ts:

Do not consume caffeine, alcohol, or any stimulants during a symptomatic episode
Do not drive during an active arrhythmia episode
Do not take additional doses of prescribed antiarrhythmics without medical advice during an acute episode
Do not dismiss syncope as fainting without cardiac evaluation
Do not leave a patient with altered consciousness or haemodynamic instability alone

Diagnostic Tests for Arrhythmia

Diagnostic tests are:

12-lead ECG: Identifies arrhythmia type, conduction abnormalities, ischaemia, and long QT syndrome
Continuous cardiac monitoring: Detects real-time telemetry during the acute episode and for 24–48 hours post-stabilisation
Holter monitor: 24 to 48-hour ambulatory ECG recording for intermittent arrhythmias not captured on a standard ECG
Implantable loop recorder: Used in very infrequent arrhythmias; subcutaneous device records continuously for up to three years
Echocardiogram: Assesses left ventricular function, valvular disease, and structural substrate for arrhythmia
Electrophysiology study (EPS): Invasive mapping of the cardiac conduction system and it identifies the arrhythmia mechanism and guides ablation
Serum electrolytes: Measure potassium, magnesium, calcium; critical in arrhythmia assessment
Thyroid function tests: Check hyperthyroidism as it is a common cause of AF
Cardiac biomarkers: Troponin to exclude acute myocardial infarction as an arrhythmia precipitant

Complications of Untreated Arrhythmia

If left untreated for long, arrhythmia can cause:

VF or pulseless VT without defibrillation is fatal within minutes
Stroke
Heart failure
Haemodynamic collapse causing syncope and shock
Thromboembolism causing limb ischaemia
Syncopal injury like falls and trauma from loss of consciousness during arrhythmia-induced syncope.

Why Choose CARE Hospitals for Emergency Arrhythmia Care

Arrhythmia management requires rapid ECG interpretation, pharmacological expertise, and immediate defibrillation or pacing capability within the same clinical window. At CARE Hospitals, emergency cardiologists and electrophysiologists are accessible from the emergency bay, enabling cardioversion, antiarrhythmic therapy, or urgent pacing decisions without referral to a different institution. For recurrent or complex arrhythmias, electrophysiology study and catheter ablation are available through the same clinical team.

Conclusion

Not all arrhythmias are emergencies but some are immediately life threatening and the distinction requires medical assessment, not home observation. Palpitations with syncope, chest pain, or breathlessness are not benign symptoms. An unconscious, pulseless patient needs CPR and a defibrillator immediately. At CARE Hospitals, every arrhythmia presentation receives rapid ECG, monitoring, and specialist access. When in doubt, call emergency services immediately.

FAQs

1. When is arrhythmia an emergency?

When accompanied by syncope, chest pain, breathlessness, or haemodynamic compromise. Ventricular fibrillation and pulseless VT are immediate cardiac arrest emergencies. New-onset AF, SVT that does not self-terminate, and symptomatic complete heart block all require emergency assessment.

2. Can arrhythmia be life-threatening?

Yes. Ventricular fibrillation is fatal within minutes without defibrillation. Untreated AF carries a five-fold increased stroke risk. Sustained VT causes haemodynamic collapse. Complete heart block can cause sudden syncope and secondary trauma. The specific risk depends on the arrhythmia type and underlying cardiac function.

3. Should I go to the hospital for palpitations?

Go to the emergency department if palpitations are accompanied by dizziness, syncope, chest pain, or breathlessness or if they are new, prolonged, or occur in a patient with known heart disease. Brief, isolated palpitations in an otherwise well person can be assessed electively, but any doubt warrants emergency evaluation.

4. Can an arrhythmia go away on its own?

Some do. SVT frequently self-terminates, paroxysmal AF reverts to sinus rhythm within 48 hours in many patients, and ectopic beats are almost always benign and transient. VT and VF do not self-terminate safely and they require immediate intervention. The arrhythmia type, not the symptom alone, determines whether spontaneous resolution is safe or dangerous.

5. Can arrhythmia be cured?

Many arrhythmias can be cured with catheter ablation - a procedure that uses radiofrequency energy or cryotherapy to ablate the abnormal electrical pathway. Success rates are high for SVT and paroxysmal AF. Reversible causes like hyperthyroidism, electrolyte abnormality, and drug toxicity - when corrected, resolve the arrhythmia entirely. Structural heart disease-related arrhythmias are managed rather than cured, though device therapy (ICD, pacemaker) provides protection.

6. When should I call an ambulance?

Call ambulance immediately for any loss of consciousness during palpitations, for chest pain with rapid heartbeat, for breathlessness and palpitations that do not resolve within minutes, or if the patient becomes unresponsive (begin CPR while waiting). Do not drive a patient with an active arrhythmia and haemodynamic compromise to the hospital yourself.