Atrial Fibrillation (AFib)
AFib is the most common sustained cardiac arrhythmia, characterized by chaotic atrial electrical activity leading to an irregularly irregular ventricular response. AFib increases the risk of stroke, heart failure, cognitive decline, and mortality. Management focuses on symptom control, rate/rhythm strategies, and stroke prevention.
Types
- Paroxysmal: episodes stop spontaneously (<7 days)
- Persistent: episodes last >7 days or need cardioversion
- Long-standing persistent: continuous >12 months
- Permanent: rhythm accepted; no further attempts to restore sinus rhythm
Symptoms
- Palpitations, rapid heartbeat, irregular pulse
- Fatigue, decreased exercise tolerance
- Shortness of breath, dizziness, chest discomfort
- Some patients asymptomatic (detected on ECG/wearables)
Diagnosis
- ECG showing absent P waves with irregularly irregular rhythm
- Ambulatory monitoring (Holter, patch, implantable loop recorder) for intermittent AF
- Echocardiogram to assess atrial size, valvular disease, ventricular function
- Labs: thyroid function, electrolytes, kidney/liver function
- Sleep study if OSA suspected; evaluate for hypertension, obesity, alcohol use
Risk Stratification
- Stroke risk: CHA₂DS₂-VASc score determines need for anticoagulation
- Bleeding risk: HAS-BLED or ORBIT score informs monitoring
- Structural heart disease influences treatment choices
Treatment Strategies
Stroke Prevention (Anticoagulation)
- Direct oral anticoagulants (DOACs): apixaban, rivaroxaban, dabigatran, edoxaban
- Warfarin if DOACs contraindicated or mechanical valves
- Left atrial appendage occlusion devices (Watchman) when anticoagulation not tolerated
Rate Control
- β-blockers, non-dihydropyridine calcium channel blockers, digoxin
- AV node ablation with pacemaker in refractory cases
Rhythm Control
- Antiarrhythmic drugs (flecainide, propafenone, sotalol, dofetilide, amiodarone)
- Electrical cardioversion
- Catheter ablation (pulmonary vein isolation) for symptomatic AF or heart failure with reduced EF
- Surgical Maze procedure for concomitant cardiac surgery cases
Lifestyle Interventions
- Weight loss, blood pressure control
- Limit alcohol and caffeine, stop smoking
- Treat sleep apnea, manage stress
- Exercise regularly; avoid extreme endurance if triggers AF
Living with AFib
- Track heart rate/rhythm via wearables, note triggers and symptoms
- Adhere to anticoagulation regimen; monitor for bleeding signs
- Keep up with INR checks if on warfarin
- Maintain hydration, moderate electrolyte-rich diet
- Carry an AFib action plan; know when to seek urgent care
Complications
- Ischemic stroke/systemic embolism
- Heart failure, tachycardia-induced cardiomyopathy
- Cognitive decline/dementia
- Reduced quality of life, anxiety/depression
Research & Future Directions
Advances include pulsed-field ablation, hybrid surgical-catheter approaches, personalized digital therapeutics, and atrial cardiomyopathy biomarkers.
Experimental & Emerging Treatments
- Pulsed Field Ablation (PFA): Non-thermal energy selectively ablates atrial tissue with less collateral damage.
- Genetic/Polygenic Risk Scores: Identify individuals most likely to benefit from aggressive prevention.
- Wearable + AI Algorithms: Continuous AF detection and stroke risk prediction with smartwatches and patches.
- Autonomic Modulation: Renal denervation and ganglionated plexi ablation explored for AF burden reduction.
Track AFib with Diagnoza.care
Stay in Rhythm with Insight – Log heart rate/rhythm data, anticoagulation doses, INR (if applicable), triggers (sleep, stress, alcohol), blood pressure, exercise, and cardiology visits; capture side effects; and let the AI companion signal trends requiring medication or procedure reassessment.
Medical Disclaimer: Informational only. Partner with your cardiologist/electrophysiologist to personalize stroke prevention, rate/rhythm strategy, and follow-up.
Sources: American College of Cardiology/American Heart Association, Heart Rhythm Society, European Society of Cardiology