Atrial Fibrillation: Diagnosis, Treatment, and Lifestyle Changes

How to diagnose Atrial fibrillation

1 Clinically there is an irregularly irregular pulse. This irregularity cannot be resolved by exercise.
2 ECG (Electrocardiogram) – There are no P waves, because cardiac impulses originate from sites other than SA node. Baseline of ECG may show irregular fibrillary waves, Irregularly irregular QRS complexes with a rate usually 120-180 beats/minute.

3 Holter monitor and Event recorder- When atrial fibrillation is paroxysmal (it does not persist all the time) then one single ECG may not be able to diagnose atrial fibrillation because the patient’s heart rhythm may be normal during recording the ECG. In that situation the help of a Holter monitor and Event recorder may be taken.
A Holter monitor is a portable ECG machine that is kept with the patient by a belt or shoulder strap and it records heart activity for 24 hours or longer, as the time period is set. So this device records ECG for 24 hours or longer and if there is atrial fibrillation within this time period it can diagnose atrial fibrillation.
Event recorder is also a portable ECG device which can record heart activity for weeks or months and it has one button which can be pushed by the patient when he/she feels some abnormality in heart activity such as rapid rate or irregularity of heart rate. Event recorder records ECG a few minutes preceding and following the pressing of button. Thus it can diagnose whether this abnormal feeling is due to atrial fibrillation or not.

After diagnosis of atrial fibrillation the following tests may be done
1 Echocardiogram- It uses ultrasound by a transducer to diagnose if there is any structural heart disease causing atrial fibrillation or if there is any blood clot in the heart as a consequence of atrial fibrillation.
2 Blood tests to see whether there is any abnormality in thyroid function, or electrolyte imbalance.
3 Chest xray to evaluate heart and lung conditions.

Treatment of atrial fibrillation

Treatment of atrial fibrillation should be individualized according to the clinical situation of the patient. One or more treatment modalities may be required in a particular case.
Treatment options available-
1 Rate control drugs
2 Rhythm control drugs ( chemical cardioversion)
3 Electrical cardioversion
4 Catheter ablation- a) Radiofrequency ablation b) Cryoablation
5 Surgical ablation- a) Cox-Maze operation b) Mini-Maze operation c) Hybrid ablation.
6 Treatment of underlying disease that may cause atrial fibrillation such as hyperthyroidism, hypertension etc
7 Anticoagulant drugs to prevent thromboembolism
8 Lifestyle modification
Before treating a patient with atrial fibrillation the following factors must be considered
1 Hemodynamic status of the patient
2 Type of atrial fibrillation
3 Whether there is risk of stroke [by CHA2DVA2SC score (CHA2DS2 VASC is a scoring system to evaluate risk of ischemic stroke in a patient with atrial fibrillation)]
4 Whether the patient is already on anticoagulant and level of anticoagulation
5 Presence or absence of CAD (Coronary artery disease)
6 Presence or absence of structural heart disease
7 Presence or absence of hypertension
8 Any underlying cause of atrial fibrillation such as hyperthyroidism
If atrial fibrillation is due to some underlying cause such as hyperthyroidism that is to be treated.
There may be serious comorbid conditions such as sepsis, COPD, CHF ( congestive heart failure) which may give rise to rapid ventricular rate ( compensatory) and atrial fibrillation is incidental. In these cases use of rate and rhythm control drugs even electrical cardioversion may have serious adverse effects. So at first these underlying causes to be corrected.
If the patient is hemodynamically unstable, urgent electrical cardioversion may be necessary.

Rate control drugs

Rate control drugs are used to slow the rate of atrial fibrillation –
1 Beta blockers- such as metoprolol
2 Calcium channel blocker- such as verapamil, diltiazem
3 Digoxin.
Rate control is necessary i) to relieve symptoms in a symptomatic patient ii) to prevent tachycardia induced cardiomyopathy.
Digoxin is not commonly used alone in case of acute atrial fibrillation.

Rhythm control drugs (antiarrhythmics) /Chemical cardioversion

Use of antiarrhythmic drugs to restore sinus rhythm in atrial fibrillation is also known as chemical cardioversion. Two things to remember before attempting any cardioversion- (A) Slow the heart rate to <120/minute before cardioversion using rate control drugs to avoid risk of increased ventricular rate. (B) It is a good practice to perform a TEE ( transesophageal echocardiography) to see if there is a thrombus (blood clot) in the left atrium, especially if the duration of atrial fibrillation is >24 hours.
If there is a thrombus in the left atrium, cardioversion may be deferred. Not observing a thrombus in TEE does not exclude the risk of embolism.
If the atrial fibrillation is >12 hours of duration but there is high risk of thromboembolism (CHA2DS2 VASC score is ≥2 in men and ≥ 3 in women) anticoagulant treatment may be continued for at least 4 weeks (INR 2- 3) before cardioversion. (CHA2DS2 VASC is a scoring system to evaluate risk of ischemic stroke in a patient with atrial fibrillation)
If the atrial fibrillation is < 48hours duration and if there is no thrombus in the left atrium in TEE start heparin or LMWH ( low molecular weight heparin) simultaneously with cardioversion followed by administration of warfarin. Continue heparin/ LMWH until the INR 1.8 with the administration of warfarin. Then continue oral anticoagulant for at least 30 days after cardioversion. Thereafter anticoagulants may be continued according to CHA2DS2 VASC score.
If duration of atrial fibrillation is > 48 hours, rate control drug + anticoagulant may be used. After a period of minimum four weeks on anticoagulation and when INR ( International normalized ratio) is greater than 2 in two separate occasions, rhythm control drugs may be given.
Antiarrhythmic drugs such as Ibutilide (Class-lll), amiodarone(III), flecainide(Ic), propafenone(Ic), procainamide(Ia), Quinidine (la) are used to terminate atrial fibrillation.

Electrical cardioversion

In this procedure a device called a defibrillator is used to give electric shock to the heart with some abnormal rhythm to restore normal (sinus) rhythm.
Electrical cardioversion is usually used to treat atrial fibrillation. If rhythm control drugs fail to work or cause side effects or they stop working then Electrical cardioversion may be necessary. It is also used to treat atrial flutter, supraventricular tachycardia (SVT), ventricular tachycardia with pulse.
Electrical cardioversion is lifesaving in emergency situations. If the patient is hemodynamically unstable, urgent electrical cardioversion may be necessary. Read more

Catheter ablation

Catheter ablation is a minimally invasive procedure usually done by interventional cardiologists by which some abnormal heart rhythm is corrected. In this procedure the area from which abnormal heart rhythm originates or the area where arrhythmia sustains are destroyed by using radio frequency (heat ablation) or cryofreezing (using cold), or the path through which abnormal rhythm enters the heart is blocked by destroying the path. Destroying this tissue helps restore the heart’s normal rhythm. Read more

Surgical ablation

Types of surgical ablation
i) Cox-Maze operation
ii) Mini-Maze operation
iii) Hybrid Ablation.
Cox-Maze operation- Original Cox-Maze operation performed by Dr James L. Cox in 1987. It is an open heart surgery and usually done at the time when the heart needs surgery for another reason also, such as for coronary artery bypass surgery or heart valve surgery. A standard sternotomy done. Heart lung bypass machine is used. Incisions are made in both atria in such areas which are responsible for initiation and propagation of atrial fibrillation, thus allowing the heart to beat with its normal sinus rhythm.
Mini-Maze operation- Since the introduction of Cox-Maze operation modifications have been made such as Cox-Maze ll and Cox-Maze lll. The latest version is Cox-Maze lV introduced in 2002. In this procedure small incisions in the chest wall are done. A fiber optic camera is introduced through the incision to visualize the heart. Several lesions are made in atria by using bipolar radio frequency or cryotherapy instead of cutting atria.
It is a minimally invasive procedure with fewer complications than the original Cox-Maze operation. Sometimes left atrial appendage is also removed during the procedure to prevent stroke and to reduce anticoagulant requirement. Full effect of surgical ablation may take place after several months so during this period antiarrhythmic medications and anticoagulants should be taken.
Hybrid ablation- Hybrid ablation means applying both Mini-Maze procedure along with catheter ablation.
Complications of surgical ablation- Bleeding, Infection, arrhythmia, stroke.
Success rate of Cox-Maze operation is 80- 95% and it significantly lowers the need for anticoagulation therapy.

Lifestyle Changes for Managing AFib

Long-term management requires lifestyle adjustments, including:

Eat a balanced, low-salt diet
Avoid stimulants (energy drinks, excess caffeine)
Engage in moderate physical activity
Limit alcohol and smoking
Maintain a healthy weight
Practice stress management
Get adequate sleep
Take medications as prescribed and monitor INR if on warfarin

Consistency in these habits improves heart rhythm stability and overall health.

Counselling and Support for AFib Patients

Living with AFib can be emotionally challenging. Patients are encouraged to:

Join support groups (online or hospital-based)
Seek psychological counseling for anxiety or depression
Educate themselves about medication management and stroke prevention
Work closely with cardiologists, nutritionists, and physiotherapists

Comprehensive care improves both quality of life and treatment adherence.

Conclusion

Atrial Fibrillation is a manageable condition with early detection, proper treatment, and consistent lifestyle changes. Regular medical follow-up, adherence to prescribed therapies, and proactive self-care are key to living a healthy life despite AFib. Advances in treatment—like catheter ablation and improved anticoagulants—offer new hope for patients worldwide.

External Authoritative Sources:

Atrial fibrillation – Everything you should know