Difference between AFib and SVT (With Table)

The arrhythmias that will be addressed in this article are a few different types of arrhythmias that are caused by faults in the heart’s conducting mechanism.

Both disorders cause fast heart rates, which can be fatal if not addressed promptly. Although both create an anomaly in the rhythm of your heartbeat, there is a comparison between the two.

AFib vs SVT

The main difference between AFib and SVT is that AFib is a type of arrhythmia that can have long-term implications. It can arrive and go, just like SVT, or it can stay for extended amounts of time, resulting in heart attacks, heart problems, or strokes, among other things, on the other hand, SVT is a common thing that typically causes no issues as long as it is brief and does not linger for extended periods.

AFib and SVT, sometimes, may not create any symptoms and therefore can arrive and go, causing almost no harm to the body.

Atrial fibrillation, or ‘afib,’ occurs whenever the atria of the heart flicker or shivers instead of entirely contracting, allowing blood to flow to the ventricles and then out to the body. During atrial fibrillation, blood may gather and pooled, resulting in inadequate blood circulation across the heart and body.

SVT is a common occurrence that normally causes no concerns as much as it is only brief and does not linger for lengthy periods. Although tension, temperature, and exercising can produce cardiac arrhythmias, these are not the reasons for SVT, which would be mainly caused by conditions that aren’t usually linked with arrhythmia.

Comparison Table Between AFib and SVT

Parameters of comparisonAFibSVT
TherapyMedication, but ablation if the sufferer does not try to emulate their doctor’s advice and still has issues.If the sufferer does not react to medicine or other possible treatments, ablation may be required.
ElectrocardiogramEKG pulse that is irregularly formed (irregular), frequently with a high heart rate.When left untreated, the heartbeat is steady but quicker than usual.
Sign of illnessSymptoms and indicators include palpitations, dyspnea, an increasing decrease of exercise ability, and an erratic pulse.Dizziness; weariness; quick, strong, and infrequent palpitations.
Risk factorsGetting older, having a history of heart problems or stroke, raised blood pressure, or having diabetes are all risk factors.Rarely, structural problems such as openings between the upper chambers (atrial septal defect/ASD) have been linked to the condition.
LocationsAFib is a type of arrhythmia that develops in the atria.The ventricles are affected by SVT.

What is AFib?

Either of these cardiac rhythms is atrial fibrillation, usually known as ‘AFib.’ Those upper chambers are delivering electrical impulses to them at an extraordinarily fast rate in this scenario.

Individuals with AFib should seek medical care right away since this form of arrhythmia can produce blood clots and end in a stroke if left untreated.

AFib, on either hand, occurs when the atria and ventricles pump at different rates. If left untreated, this leads to blood collecting in the heart’s chambers, which can progress to a stroke or severe heart failure.

Doctors may struggle to diagnose and monitor abnormal heart rhythms because indications such as weariness or shortness of breath, which are common with abnormal heartbeats, may go unnoticed.

Sick people with AFib are more likely to have chronic renal disease or coronary artery disease, both of which lead to stroke.

A patient with atrial fibrillation might have an atrial flutter, which is a cardiac rhythm disorder. Despite the fact that atrial flutter is not the same as atrial fibrillation, the treatment is extremely same.

Medications, therapies to restore the heart rhythm, and catheter operations to stop incorrect heart signals are all possible treatments for afib.

In atrial fibrillation, the heart rate can vary between 100 to 175 beats per minute. A heartbeat of 60 to 100 beats per minute is considered normal.

What is SVT?

SVT is a hazardous cardiac rhythm that doctors must monitor in their sufferers. This ailment usually affects the heart’s bottom chambers or ventricles.

It most commonly affects persons between the ages of 40 and 60, but it can also affect younger children and infants.

Supraventricular tachycardia, or SVT, is a form of fast heartbeat that begins in the heart’s upper chambers.

An ectopic beat – one that originates beyond one of your native pacemaker sites either within the ventricle – is frequently the first symptom of this problem. Your heart will start to race if you do have an ectopic beat. You’ll get SVT if you don’t address it for more than just a few minutes or seconds.

SVT is produced by aberrant electrical signals that generate a fast heartbeat when one chamber contracts too quickly while others do not contract at all.

60 to 100 beats per minute is a regular heart rate (bpm). SVT, on the other hand, causes your heart rate to rise above 100 beats per minute. When you’re sleeping or exercising, this can happen.

Exhaustion, caffeine, drink, or narcotics can all cause SVT, but it’s more common that there isn’t a clear cause.

SVT is a rare life-threatening condition. However, if you continue to have extended bouts, you may also need hospitalisation.

Main Differences Between AFib and SVT

  1. AFib can develop when your heart’s electrical impulses are now out of synchronization, whereas SVT is caused by an issue with your neurological system.
  2. SVT could be cured by drugs, whereas  AFib is a persistent cardiac ailment.
  3. If drugs for AFib do not work correctly throughout the period, this could lead to other health problems such as blood clots or strokes, whereas SVT is treatable with medicines. If the drug does not work effectively throughout the period, a specialist will need to suggest anything else.
  4. AFib can affect people over the age of 40 whereas SVT is more frequent in teens and young adults.
  5. Cardiac contractions are quick, erratic, and uncontrolled, whereas cardiac muscular contractions are well regulated and occur at a quick speed.


Atrial fibrillation is harmful because that can generate blood clots, which can lead to strokes. It can also be resistant to treatment. SVT is a heart disease in which the heart muscle beats too quickly. The major distinction between afib and tachycardia is that even the electrical impulses that regulate the heart rate are really out of synchronization.


  1. https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.heart.org/-/media/files/health-topics/answers-by-heart/what-is-atrial-fibrillation.pdf&ved=2ahUKEwi6—Bxq_2AhUPy4sBHYJwDIYQFnoECAYQAQ&usg=AOvVaw1NiPCL5rx3rtRISyaJRMBu
  2. https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.rcpjournals.org/content/clinmedicine/20/1/43.full.pdf&ved=2ahUKEwjUm9agxq_2AhWMvpQKHW5sB_0QFnoECDoQAQ&usg=AOvVaw2dL8z_dBjX6RMO58aD6IA4