Have you ever felt your heart "flutter," race, or skip a beat? This may signal a heart rhythm disorder. The most common type is atrial fibrillation, which becomes more frequent with age and carries a real risk of stroke. Early diagnosis and treatment protect against its dangers. The ClinicsJo Editorial Team explains this important topic simply.
What Is Arrhythmia?
A normal heart beats regularly (60–100 beats per minute at rest) thanks to organized electrical signals from the sinus node. When these signals malfunction, the heartbeat becomes too fast, too slow, or irregular. Atrial fibrillation is the most common arrhythmia: the atria quiver instead of contracting regularly, making the pulse fast and chaotic.
Causes
- High blood pressure and heart or valve disease.
- Overactive thyroid.
- Electrolyte imbalance (potassium and magnesium).
- Excess caffeine, alcohol, and smoking.
- Stress and sleep deprivation.
- Obstructive sleep apnea.
Symptoms
- Palpitations or a fluttering sensation in the chest.
- A fast or irregular pulse.
- Dizziness and sometimes fainting.
- Shortness of breath and fatigue.
- Chest pain or pressure.
Sometimes there are no symptoms and AFib is found by chance, which is why periodic checks matter for older adults.
The Biggest Risk: Stroke
In atrial fibrillation, blood can pool in the atrium and form a clot that travels to the brain, causing a stroke. Preventing clots with blood thinners is therefore a cornerstone of treatment in at-risk patients, assessed by specific risk criteria.
How Is It Diagnosed?
- ECG: the basic test.
- Holter monitor: records rhythm for 24–48 hours or more.
- Echocardiogram to assess heart structure.
- Blood tests for thyroid and electrolytes.
Treatment
- Rate and rhythm drugs to slow or restore the heartbeat.
- Blood thinners to prevent clots in AFib.
- Electrical cardioversion to restore normal rhythm.
- Catheter ablation to treat the abnormal electrical focus.
- Pacemakers for slow rhythms.
Prevention and Lifestyle
- Control blood pressure, diabetes, and thyroid function.
- Reduce caffeine and alcohol and quit smoking.
- Sleep well and treat sleep apnea.
- Exercise moderately and keep a healthy weight.
Medical tip: do not ignore recurrent palpitations even if they pass quickly; a Holter recording may reveal silent AFib needing blood thinners that prevent a devastating stroke.
When to See a Doctor
See a cardiologist for recurrent palpitations, dizziness, or fainting, and seek emergency care for severe chest pain, acute breathlessness, or loss of consciousness.
Frequently Asked Questions
Are palpitations always dangerous?
Not always; many are benign and brief, but frequent episodes or those with dizziness need evaluation.
Can atrial fibrillation be cured?
It can be well controlled, and in selected cases catheter ablation offers a near-definitive cure.
Are blood thinners lifelong?
In many AFib cases yes, to prevent clots; the doctor decides based on each patient's risk factors.
To assess your rhythm and plan safe care, book with a cardiologist on ClinicsJo.
