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What to do about cardiac arrhythmias: Causes and Help
Cardiac arrhythmias can be harmless or serious. Learn which immediate measures help and when urgent medical attention is required.
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Cardiac arrhythmias can be harmless or serious. Learn which immediate measures help and when urgent medical attention is required.
What are cardiac arrhythmias?
Cardiac arrhythmias are irregularities in the normal heartbeat. The heart may beat too fast (tachycardia), too slowly (bradycardia), or in an irregular pattern. Some arrhythmias are harmless and temporary, while others may indicate serious underlying conditions and require medical treatment.
Causes
Cardiac arrhythmias can have many causes, including:
- Stress and exhaustion
- Caffeine, alcohol or nicotine
- Electrolyte imbalances (e.g., low potassium or magnesium)
- Thyroid disorders
- Heart conditions such as coronary artery disease or heart failure
- Certain medications (e.g., antiarrhythmics, diuretics)
- Congenital heart defects
- High blood pressure
Symptoms
Common signs of cardiac arrhythmias include:
- Palpitations or racing heart
- Irregular heartbeat
- Dizziness or light-headedness
- Shortness of breath
- Chest tightness or chest pain
- Fainting or loss of consciousness
- General weakness and fatigue
What to do about cardiac arrhythmias
Immediate measures for mild symptoms
For mild, temporary arrhythmias, the following steps may help:
- Stay calm and sit or lie down
- Breathe slowly and deeply to calm the nervous system
- Drink cold water or splash cold water on your face
- Valsalva maneuver: Bear down as if having a bowel movement to stimulate the vagus nerve and slow the heart rate
- Avoid caffeine, alcohol and nicotine
- Ensure adequate fluid and electrolyte intake
When to call emergency services immediately
Call emergency services (911 or your local emergency number) or go to the nearest emergency room immediately in these situations:
- Severe chest pain or pressure
- Loss of consciousness or sudden fainting
- Persistent severe shortness of breath
- Very fast or very slow heartbeat accompanied by severe dizziness
- Signs of a stroke (paralysis, speech difficulties, vision disturbances)
Diagnosis
Doctors use various diagnostic methods to identify the type of arrhythmia:
- ECG (electrocardiogram): Records the electrical activity of the heart
- Holter monitor (24-48 hour ECG): Continuous heart rhythm monitoring over one to two days
- Exercise stress ECG: Heart monitoring during physical exertion
- Echocardiography: Ultrasound examination of the heart
- Blood tests: Checking electrolyte levels, thyroid function and cardiac markers
- Electrophysiology study (EPS): Specialized test to precisely locate abnormal electrical pathways
Treatment
Treatment depends on the type and severity of the arrhythmia:
- Medications: Antiarrhythmics, beta-blockers or calcium channel blockers to regulate heart rhythm
- Electrical cardioversion: Restoring normal heart rhythm using controlled electrical shocks
- Catheter ablation: Minimally invasive procedure to destroy abnormal heart tissue causing arrhythmias
- Pacemaker: Device implanted to regulate a heart that beats too slowly
- Implantable cardioverter-defibrillator (ICD): Device used to treat life-threatening ventricular arrhythmias
- Lifestyle changes: Stress reduction, regular exercise, healthy diet, and avoiding alcohol and tobacco
Prevention
The following measures can help reduce the risk of cardiac arrhythmias:
- Regular moderate physical activity (e.g., walking, swimming, cycling)
- Balanced diet rich in magnesium and potassium
- Avoiding smoking and excessive alcohol consumption
- Stress management techniques (e.g., yoga, meditation)
- Regular medical check-ups
- Treatment of underlying conditions such as high blood pressure or thyroid disorders
References
- European Society of Cardiology (ESC): 2020 ESC Guidelines for the diagnosis and management of atrial fibrillation. European Heart Journal, 2021.
- Zipes DP et al.: Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 12th edition. Elsevier, 2022.
- World Health Organization (WHO): Cardiovascular diseases (CVDs). Fact Sheet. Available at: www.who.int (accessed 2024)
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