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Supraventricular tachycardia (SVT): Causes - Symptoms- Diagnosis -Treatment


 What is Supraventricular tachycardia (SVT)?

SVT (supraventricular tachycardia) could be a common quiet heart condition once your heartbeat is just too quick. you will or might not have symptoms like hurting or vertigo. There are some belongings you will do on your own, however you will want medication or surgery to assist with symptoms.

When your rhythm isn’t traditional or the speed of the heartbeats isn’t right, you may have an associate degree heart condition. There are completely different names for various styles of arrhythmias, counting on wherever they happen within the heart and what causes the matter. Arrhythmia means that your heart is thrashing too quickly. It will reach over one hundred beats a second whereas resting.

With SVT (supraventricular tachycardia), your quick vital sign begins in your higher heart chambers. The cause could be a downside with the electrical signals and electronic equipment within the heart. Once your heart is thrashing too quickly, your heart can’t fill with blood between beats, creating it exhausting to urge enough blood to your body.

What is Supraventricular tachycardia (SVT)?
Supraventricular tachycardia (SVT)

Think about it like this: If elevator doors shut too quickly, folks don’t have enough time to squeeze into the elevator before the doors shut. Similarly, once the center beats too quickly, there’s not enough time to fill with blood before the center chambers contract.

  1. Circulatory system
    1. Heart

    2. Arteries

    3. Veins

    4. Capillaries

medical terms

  • Supraventricular tachycardia (SVT) is a type of rapid heartbeat that originates from the upper chambers of the heart. It can cause the heart rate to rapidly increase to over 200 beats per minute and can last from seconds to minutes or even longer. While SVT is usually not life-threatening, it can cause chest pain and lightheadedness, and should be taken seriously. SVT can be diagnosed through an electrocardiogram, a test that records electrical activity in the heart.

  • Supraventricular cardiac arrhythmia (SVT) is as Associate in Nursing on an irregular basis quick or erratic heartbeat (arrhythmia) that affects the heart's higher chambers. SVT is additionally referred to as attack supraventricular cardiac arrhythmia.

  • The typical heart beats about sixty to one hundred times a second. A vital sign of over one hundred beats a second is named cardiac arrhythmia . Throughout the Associate in Nursing episode of SVT, the center beats about one hundred fifty to 220 times a second, however it will sometimes beat quicker or slower.

  • Most people with supraventricular cardiac arrhythmia do not like activity restrictions or treatment. For others, fashion changes, medication and heart procedures could also be required to manage or eliminate the speedy heartbeats and connected symptoms.

  • (SVT) is the most common pre-arrest arrhythmia Supraventricular tachycardia (SVT) also known as just "supraventricular tachyarrhythmia" and abbreviated to SVT is a group of heart conditions with similar characteristics but different causes and many types SVT can cause a rapid heart rate that beats too quickly because it originates above the ventricles rather than within them

  • Supraventricular tachycardia (SVT) also known as paroxysmal supraventricular tachycardia (PSVT) is a type of tachycardia originating above the ventricles in the atria or upper chambers SVT and PSVT both refer to the same arrhythmia The heart rate for this disorder ranges from 150 beats per minute up to 250 beats per minute but can go higher with exercise It is most often associated with palpitations caused by panic attacks and chronic stress however there are many other potential causes Thus it may be difficult to determine whether.

Types Supraventricular tachycardia (SVT)

Supraventricular tachycardia (SVT) falls into three main groups:

  • Atrioventricular nodal reentrant tachycardia (AVNRT). This is the most common type of supraventricular tachycardia.

  • Atrioventricular reciprocating tachycardia (AVRT). AVRT is the second most common type of supraventricular tachycardia. It's most commonly diagnosed in younger people.

  • Atrial tachycardia. This type of SVT is usually diagnosed in those who have a heart condition. chamber arrhythmia does not involve the Jewish calendar month node.
    Other kinds of supraventricular arrhythmia include: 

  • Sinus tachycardia

  • Sinus nodal reentrant tachycardia (SNRT)

  • Inappropriate sinus tachycardia (IST)

  • Multifocal atrial tachycardia (MAT)

  • Junctional ectopic tachycardia (JET)

  • Nonparoxysmal junctional tachycardia (NPJT)

Types Heart arrhythmia

In fashion, heart arrhythmias are grouped by way of the speed of the heart charge. For instance:

  • Tachycardia is a quick coronary heart. The resting heart charge is extra than 100 beats a minute.

  • Bradycardia is a gradual heartbeat. The resting heart fee is much less than 60 beats a minute.

Types of tachycardias encompass:

  1. Ventricular fibrillation
  2. Atrial flutter
  3. Ventricular tachycardia
  4. Supraventricular tachycardia
  5. Atrial fibrillation

Symptoms Supraventricular tachycardia (SVT)

The main symptom of supraventricular arrhythmia (SVT) may be a in no time heartbeat (100 beats a second or more) that will last for a number of minutes to a number of days. The quick heartbeat could come back and go suddenly, with stretches of typical heart rates in between.

Some individuals with SVT haven't any signs or symptoms.


Signs and symptoms of supraventricular arrhythmia could include:

  • Very fast (rapid) heartbeat

  • A fluttering or pounding in the chest (palpitations)

  • A pounding sensation in the neck

  • Weakness or feeling very tired (fatigue)

  • Chest pain

  • Shortness of breath

  • Lightheadedness or dizziness

  • Sweating

  • Fainting (syncope) or near fainting

In infants and extremely young youngsters, signs and symptoms of SVT are also troublesome to spot. They embrace sweating, poor feeding, pale skin and a speedy pulse. If your kid or young kid has any of those symptoms, raise your child's care supplier concerning SVT screening.

When to see a doctor

Supraventricular cardiac arrhythmia (SVT) is mostly not grave unless you've got heart harm or alternative heart conditions. However, in extreme cases, an Associate in Nursing episode of SVT could cause a state of mind or pathology.

Call your health care supplier if you've got an Associate in Nursing episode of a really quick heartbeat for the primary time or if an Associate in Nursing irregular heartbeat lasts longer than a number of seconds.

Some signs and symptoms of SVT could also be associated with a significant health condition. decision 911 or your native emergency variety if you've got Associate in Nursing episode of SVT that lasts for quite a number of minutes or if you've got Associate in Nursing episode with any of the subsequent symptoms:

  • Chest pain

  • Shortness of breath

  • Weakness

  • Dizziness

Causes Supraventricular tachycardia (SVT)

A problem along with your heart’s electrical signals or electronic equipment causes SVT, however some individuals might not bear in mind what brings on their symptoms. Others have a transparent “trigger” like stress or exercise that starts their SVT. Things that may motivate symptoms embrace for a few individuals, a supraventricular cardiac arrhythmia (SVT) episode is said to have a clear cause (trigger), like exercise, stress or lack of sleep. Some individuals might not have a plain trigger.

Things which will cause AN SVT episode include:

  • Heart disease

  • Heart failure

  • Other heart conditions, such as Wolff-Parkinson-White syndrome

  • Chronic lung disease

  • A lot of caffeine

  • Drinking too much alcohol

  • Drug misuse, including cocaine and methamphetamine

  • Pregnancy

  • Smoking

  • Thyroid disease

  • Certain medications, including asthma medications and cold and allergy drugs

How does the heart beat?

The heart is formed of 4 chambers — 2 higher chambers (atria) and 2 lower chambers (ventricles).

The heart's rhythm is controlled by a natural pacemaker (the sinus node) within the right higher chamber (atrium). The sinus node sends electrical signals that usually begin every heartbeat. These electrical signals move across the atria, inflicting the guts muscles to squeeze (contract) and pump blood into the ventricles.

Next, the guts signals attain a cluster of cells known as the Ab node, wherever the signals weigh down. This slight delay permits the ventricles to fill with blood. Once the electrical signals reach the ventricles, the chambers contract and pump blood to the lungs or to the remainder of the body.

In a typical heart, this heart sign method typically goes swimmingly, leading to a resting pulse of sixty to one hundred beats a moment.

SVT happens once faulty electrical connections within the heart go off a series of early beats within the higher chambers of the guts (atria). Once this happens, the guts rate accelerates terribly quickly. The guts do not have enough time to fill with blood before the chambers contract. As a result, you'll feel lightheaded or dizzy as a result of your brain not obtaining enough blood and chemical elements.

Risk factors Supraventricular tachycardia (SVT)

Supraventricular heart disease|arrhythmia} (SVT) is the commonest style of arrhythmia in infants and kids. It conjointly tends to occur a lot typically in girls, significantly throughout physiological state, although it should occur in anyone.

Other things which will increase the danger of supraventricular arrhythmia are:

  • Age. Some types of SVT are more common in people who are middle-aged or older.

  • Coronary artery disease, other heart disease or previous heart surgery. .Narrowed heart arteries, cardiomyopathy, injury to the guts or heart valves, heart condition, and alternative cardiovascular disease might increase the danger of developing SVT 

  • Congenital heart disease. A heart problem present at birth (congenital heart defect) may cause irregular heartbeats such as SVT.

  • Thyroid disease. Having an overactive or underactive thyroid gland can increase the risk of supraventricular tachycardia.

  • Diabetes. The risk of developing heart disease and high blood pressure greatly increases with uncontrolled diabetes.

  • Obstructive sleep apnea. This disorder, in which breathing is interrupted during sleep, can increase the risk of supraventricular tachycardia.

  • Nicotine and illegal drug use. Nicotine and illegal drugs, such as amphetamines and cocaine, may trigger an episode of supraventricular tachycardia.

Complications Supraventricular tachycardia (SVT)

Over time, untreated and frequent episodes of supraventricular arrhythmia (SVT) could weaken the guts and result in heart condition, significantly if there area unit different medical conditions.

In extreme cases, an Associate in Nursing episode of SVT could cause a state of mind or pathology.

Prevention Supraventricular tachycardia (SVT)

To prevent associate degree episodes of supraventricular arrhythmia (SVT), it is important to spot the triggers and take a look at to avoid them. contemplate keeping a diary to assist establish your triggers. Track your pulse rate, symptoms associate degreed activity at the time of an SVT episode.

Also, use medications with caution. Some drugs, together with those bought while not a prescription, could contain stimulants that trigger a fast heartbeat.

Supraventricular tachycardia ecg findings

Supraventricular tachycardia (SVT) is a cardiac arrhythmia of a rate greater than 100 beats per minute and is not caused by an abnormality of the heart's electrical conduction system The most common types AVNRT or AVRT are paroxysmal supraventricular tachycardias in which the rhythm originates above the ventricles In some people it may be due to re-entry within the atria with retrograde activation of ventricles They commonly occur in women during pregnancy and those with structural heart disease Often no underlying cause can be found.

Supraventricular tachycardia is an extremely fast heart rate that is caused by a problem in the upper chambers (atria) of the heart The problem can be with the atria or it may affect how they respond to signals from the brain When problems are in the atria they usually start there and spread to involve other parts of the heart There are several types of supraventricular tachycardia One type (AV nodal reentrant tachycardia) involves a special pathway between two different parts (nodal tissues) of one area of your heart muscle.

Supraventricular tachycardia heart rate

Supraventricular tachycardia (SVT) is the term for an abnormally fast heart rate that originates from electrical impulses originating in your upper chambers of the heart. It has nothing to do with having gone too fast while exercising although it can happen during vigorous activity.

What is the drug of choice for supraventricular tachycardia?

Medications used to treat supraventricular tachycardia (SVT) or rapid heartbeat vary depending on the cause of the disorder Drugs prescribed for SVT include beta receptors blockers calcium channel blockers and digoxin Beta receptor blockers are preferred over other drugs because they have fewer side effects than other types of medications Examples include atenolol and metoprolol Calcium channel blockers block calcium from entering cardiac muscle cells which slows down the patient's heart rate and decreases blood pressure Diazepam is a form of this drug that treats SVT by slowing down the electrical impulses in your heart so that it.

What is the first treatment for supraventricular tachycardia?

First treatment for a symptomatic supraventricular tachycardia is adenosine It is generally the initial test used if the patient does not have an accessory pathway or a reentrant ventricular tachycardia and there is no associated structural heart disease This medication can be administered via IV push and will cause transient AV block of 1-2 seconds in most patients during which time you will hear atrial activity on the ECG monitor before they revert to sinus rhythm The most common side effects are chest discomfort and flushing.

How do you calm a racing heart?

If your heart is beating faster than normal or you feel your heart pounding in your chest take several long deep breaths to slow down Or if you're at home lie down on the floor and put a pillow under the knees Raise both legs above the level of the heart and this will help to get more blood going to the brain and cause a drop in blood pressure which can be very helpful when one experiences racing pulse.

Diagnosis Supraventricular tachycardia (SVT)

Your tending supplier can presumably do associate ECG (EKG or ECG). If your supplier has to study your heart for an extended quantity of your time, they'll raise you to wear a cardiac monitor that records the electrical activity in your heart.

To diagnose supraventricular arrhythmia (SVT), your health care supplier can examine you and raise questions on your symptoms and case history. Blood tests are sometimes done to ascertain conditions which will cause similar symptoms, like thyroid malady.


Tests that may be done to evaluate the heart and diagnose supraventricular tachycardia (SVT) include:

  • Electrocardiogram (ECG or EKG). A cardiogram records the electrical activity of the center. an associate degree cardiogram measures the temporal order and length of every electrical innovate heartbeat. It will show how briskly or slow the center is thrashing. 

  • Holter monitor. This portable ECG device can be worn for a day or more to record the heart's activity during daily activities.

  • Event recorder. This wearable EKG device is employed to observe sporadic arrhythmias. You press a button once symptoms occur. A happening recorder is usually worn for up to thirty days or till you have got associate degree heart disease or symptoms. 

  • Echocardiogram. Sound waves are used to create images of the heart in motion. An echocardiogram can provide details about the heart and heart valves.

  • Implantable loop recorder. This device detects irregular heart rhythms and is implanted under the skin in the chest area.

Other tests that may be done include:

  • Exercise stress test. Supraventricular cardiac arrhythmia is also triggered or worsened by stress or exercise. throughout a check, you usually exercise on a treadmill or stationary bicycle whereas your heart activity is monitored. If you cannot exercise and your supplier thinks cardiovascular disease is also inflicting your heart condition, you will receive a drug throughout the check to stimulate the guts in a very manner that is kind of like exercise. 

  • Tilt table test. Your health care supplier might suggest this check if you've had fainting spells. Your vital signs and pressure levels} are monitored as you lie flat on a table. The table is then inclined as if you were standing up. Your supplier observes however your heart and also the system that controls it reply to the amendment in angle. 

  • Electrophysiological (EP) study. One or a lot of skinny, versatile tubes (catheters) square measure radio-controlled through a vessel, typically within the groin, to numerous spots within the heart. Sensors on the information of the catheters record the heart's electrical patterns. Associate degree EP study permits a health care supplier to envision however electrical signals unfold through the center throughout every heartbeat. 

Treatment Supraventricular tachycardia (SVT)

Most people with supraventricular cardiac arrhythmia (SVT) do not like treatment. However, if you've got long or frequent episodes, your health care supplier could suggest the following:

  • Carotid sinus massage. A health care supplier applies light pressure on the neck wherever the artery splits into 2 branches. Throughout this sort of massage, the body releases chemicals that slow the guts rate. do not decide to do arteria sinus massage on your own. 

  • Vagal maneuvers. Simple however specific actions like coughing, bearing down as if having a laxative or golf shot associate degree ice gain the face will facilitate bog down the center rate. Your health care supplier could raise you {to do|to try to to|to try to associate degreed do} these actions throughout an episode of SVT. These actions have an effect on the wandering nerve that helps manage the heartbeat. 

  • Medications. If you have frequent episodes of SVT, your health care supplier might inflict medication to regulate your rate or restore a typical rhythm. it is very necessary to require the medication specifically as directed so as to scale back complications. 

  • Cardioversion. Paddles or patches on the chest are used to electrically shock the heart and help reset the heart rhythm. Cardioversion is typically used when vagal maneuvers and medications don't work.

  • Catheter ablation. In this procedure, the doctor inserts skinny, versatile tubes known as catheters through the veins or arteries, typically within the groin. Sensors on the tip of the tube use heat or cold energy to make small scars within the heart to dam irregular electrical signals and restore a typical heartbeat. 

  • Pacemaker. Rarely, a small, implantable device called a pacemaker is needed to stimulate the heart to beat. The pacemaker is implanted under the skin near the collarbone in a minor surgical procedure. A wire connects the device to the heart.

Lifestyle and home remedies

If you've got supraventricular arrhythmia, a wholesome life-style is a very important part of your treatment arrangement.


Heart-healthy life-style changes include:

  • Eating heart-healthy foods. Eat a healthy diet rich in fruits, vegetables and whole grains. Limit salt and saturated fats.

  • Exercising regularly. Exercise daily and increase your physical activity.

  • Quitting smoking. If you smoke and can't quit on your own, talk to your health care provider about strategies or programs that can help.

  • Maintaining weight. Being overweight will increase the chance of developing cardiomyopathy. raise your health care supplier what weight is best for you. 

  • Controlling blood pressure and cholesterol. Make lifestyle changes and take medications as prescribed to correct high blood pressure (hypertension) or high cholesterol.

  • Avoiding or limiting alcohol. If you decide on drinking alcohol, do so sparsely. For healthy adults, meaning up to 1 drink on a daily basis for ladies of all ages and men older than age sixty five, and up to 2 drinks on a daily basis for men aged sixty five and younger. 

  • Maintaining follow-up care. Take your medications as prescribed. Get regular health checkups. Tell your provider if SVT symptoms worsen.

Alternative medicine

Some styles of complementary and various therapies might facilitate cut back stress. Stress will trigger supraventricular cardiac arrhythmia in some individuals. Stress-relieving techniques include:

  • Yoga

  • Meditation

  • Relaxation techniques

Preparing for your appointment

If you think that you'll have supraventricular arrhythmia, build an arrangement along with your health care supplier. If the condition is found early, treatment could also be easier and more practical. you'll be said to be a doctor trained in heart conditions (cardiologist).

Appointments are transient. As a result of there being typically heaps to debate, it is a sensible plan to be ready for your appointment. Here's some data to assist you make preparations for your appointment, and what to expect from your health care supplier.

What you can do

  • Be aware of any pre-appointment restrictions. At the time you create the appointment, make certain to raise if there is something you would like to try to do before, like prohibit your diet. you'll have to be compelled to try this if your health care supplier orders any blood tests. 

  • Write down any symptoms you're having, including any that may seem unrelated to irregular heartbeats.

  • Write down key personal information, including any case history of regular recurrence disorders (arrhythmias), cardiomyopathy, stroke, high pressure or polygenic disorder, and any major stresses or recent life changes. 

  • Make a list of all medications, vitamins or supplements that you're taking. Include those bought without a prescription.

  • Take a family member or friend along, if potential. generally it is often troublesome to recollect all the data provided to you throughout a rendezvous. somebody UN agency accompanies you'll bear in mind one thing that you just lost or forgot. 

  • Write down questions to ask your healthcare provider.

For supraventricular tachycardia, some basic questions to ask your health care provider include:

  • What's the most likely cause of my symptoms?

  • Are there other possible causes for my symptoms?

  • What kinds of tests will I need? Do I need to do anything to prepare for these tests?

  • What's the most appropriate treatment?

  • Are there any foods or drinks that you recommend I avoid? Is there anything you suggest that I add to my diet?

  • What's an appropriate level of physical activity?

  • How often should I be screened for heart disease or other complications of supraventricular tachycardia?

  • I have other health conditions. How can I best manage these conditions together?

  • Is there a generic alternative to the medicine you're prescribing?

  • Are there any brochures or other printed material that I can take home with me? What websites do you recommend visiting?

What to expect from your doctor

Your health care provider is likely to ask you many questions. Being ready to answer them may save time to go over anything you want to spend more time on. Your health care provider may ask:

  • When did you first begin having symptoms?

  • Do you always have symptoms, or do they come and go?

  • How severe are your symptoms?

  • Does anything seem to improve your symptoms?

  • What, if anything, appears to worsen your symptoms?

  • Do you have a family history of irregular heart rhythms?

General summary

  1. Supraventricular tachycardia (SVT) is a medical condition characterized by a rapid heart rate. It is caused by an abnormal electrical connection in the heart that results in abnormally fast heartbeats. SVT can cause a person to feel dizzy, breathless, and have chest pain. In some cases, the rapid heart rate can be dangerous and result in serious health complications.

  2. Supraventricular tachycardia, or SVT, is a type of heart rhythm disorder. It is characterized by an abnormally fast and regular heartbeat that originates from outside the ventricles, or lower chambers of the heart. In other words, the electrical signal that causes the heart to beat is generated in the atria, or upper chambers of the heart. As a result, the person's heart rate can be too fast and it may cause them to feel symptomatic.

  3. Supraventricular tachycardia (SVT) is an abnormally fast heartbeat originating from above the ventricles This means that it originates from the atria or another area of the heart above the ventricle The term "supraventricular" refers to areas in and around the heart above the ventricular cavity whereas "tachycardia" indicates a rapid heartbeat of more than 100 beats per minute SVT can be caused by abnormalities within the atria such as ectopic (or extra-atrial) pacemakers or abnormalities within conducting pathways between different parts of the heart.

  4. Supraventricular tachycardia (SVT) is a condition in which the heart beats at extremely fast rates The average normal heart rate ranges from 60 to 100 beats per minute while an SVT heart can beat much faster—often as quickly as 300 beats per minute or faster This rapid beating puts a strain on the heart causing symptoms such as chest pain and difficulty breathing.

Supraventricular tachycardia (SVT): Causes - Symptoms- Diagnosis -Treatment

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