How To Stop An Episode Of Paroxysmal Tachycardia?

Paroxysmal tachycardia feels like your heart suddenly shifted into overdrive. One moment you are fine, and the next your heart is racing at 150 beats per minute or more. For most people, an episode stops on its own within a few minutes or hours. If you want to stop an episode faster, the most reliable first step is a vagal maneuver, like bearing down as if you are having a bowel movement for 10 to 15 seconds. If that does not work, splashing ice-cold water on your face or coughing forcefully can also help. These actions stimulate the vagus nerve, which slows the electrical signals in your heart and can break the abnormal rhythm.

What Is Paroxysmal Tachycardia?

Paroxysmal tachycardia is a rapid heart rate that starts suddenly and stops suddenly. The word “paroxysmal” means it comes and goes without warning. The term usually refers to supraventricular tachycardia (SVT), which means the fast rhythm originates above the lower chambers of the heart.

During an episode, the heart’s electrical system misfires. A short circuit forms, causing the heart to beat faster than it should. The heart rate typically ranges from 150 to 250 beats per minute. A normal resting heart rate is between 60 and 100 beats per minute.

Most episodes are not life-threatening, but they can feel alarming. Some people experience chest discomfort, shortness of breath, lightheadedness, or anxiety during an episode. Others feel only a pounding heartbeat.

How To Stop An Episode Of Paroxysmal Tachycardia With Vagal Maneuvers

Vagal maneuvers are the first-line treatment for stopping an episode of paroxysmal tachycardia at home. They work by increasing the tone of the vagus nerve, which sends signals to the heart to slow down. These techniques are safe for most people and do not require medication.

The most effective vagal maneuver is the Valsalva maneuver. To perform it, take a deep breath, close your mouth, pinch your nose shut, and bear down as if you are trying to have a bowel movement. Hold this pressure for 10 to 15 seconds, then release and breathe normally. Some clinicians recommend lying down and raising your legs during the release phase, as this can improve the success rate.

Another option is the cold water reflex. Fill a basin with ice water and submerge your face for a few seconds. This triggers the mammalian diving reflex, which slows the heart rate. If you cannot submerge your face, splash cold water on your face and hold your breath for a few seconds.

Coughing forcefully can also stimulate the vagus nerve. Take a deep breath and cough hard several times in a row. Some people find that gagging, by touching the back of the throat, works as well. These methods are less studied than the Valsalva maneuver but are commonly used in clinical practice.

If a vagal maneuver works, the heart rate usually drops back to normal within a minute. If the first attempt fails, you can try again after a short rest. Repeated attempts are sometimes more effective than the first one.

When To Seek Emergency Care

Not every episode can be stopped at home. Some episodes do not respond to vagal maneuvers and require medical treatment. More importantly, a rapid heart rate can sometimes be a sign of a more serious condition, such as atrial fibrillation or ventricular tachycardia.

Seek emergency care immediately if you experience any of the following symptoms along with a racing heart:

• Chest pain or pressure
• Severe shortness of breath
• Fainting or near-fainting
• Confusion or difficulty speaking
• Pain radiating to your arm, jaw, or back

These symptoms may indicate that your heart is not getting enough oxygen. Do not wait to see if the episode passes. Call emergency services or have someone drive you to the nearest emergency department.

If you have a known diagnosis of paroxysmal tachycardia and your episode lasts longer than 30 minutes despite vagal maneuvers, seek medical attention. Prolonged episodes can cause blood pressure to drop and may lead to complications.

Medications Used To Stop An Episode

When vagal maneuvers fail, doctors use medications to stop the episode. These are given in a hospital or emergency setting because they require monitoring.

Adenosine is the most common medication used to stop SVT. It is given as a rapid intravenous injection. Adenosine briefly blocks the electrical signals in the heart, which resets the rhythm. It works within seconds but can cause a temporary feeling of chest pressure or flushing.

Calcium channel blockers, such as verapamil or diltiazem, are another option. These medications slow the heart rate by affecting the electrical conduction system. They are given intravenously and take effect within minutes.

Beta-blockers, such as metoprolol, are also used in some cases. They work by blocking the effects of adrenaline on the heart. These medications are less commonly used for acute episodes because they work more slowly than adenosine.

No oral medication is approved for stopping an episode of paroxysmal tachycardia at home. Some doctors prescribe “pill-in-the-pocket” therapy for people with frequent episodes, but this is not a standard approach for everyone. Discuss this option with your cardiologist if you have frequent episodes that do not respond to vagal maneuvers.

What Causes Paroxysmal Tachycardia?

Paroxysmal tachycardia occurs when an extra electrical pathway exists in the heart. This pathway is usually present from birth, even if the first episode does not happen until adulthood.

In a normal heart, electrical signals travel from the top chambers to the bottom chambers through a single pathway. In people with SVT, an extra pathway allows the signal to loop back on itself. This creates a rapid, repeating circuit that drives the heart rate up.

Certain triggers can start an episode. Common triggers include:

• Caffeine in large amounts
• Alcohol
• Stress or anxiety
• Lack of sleep
• Strenuous exercise
• Certain medications, including some cold and asthma drugs

Some people have episodes without any identifiable trigger. Hormonal changes, such as those during pregnancy or menopause, can also increase the likelihood of episodes in some women.

Can Lifestyle Changes Prevent Future Episodes?

Preventing episodes is not always possible, but some lifestyle changes may reduce their frequency. The evidence for these changes is not strong, but they are low-risk and worth trying.

Limiting caffeine and alcohol is the most common recommendation. Both substances can stimulate the heart and trigger an abnormal rhythm. If you notice that episodes happen after coffee or alcohol, reducing your intake is a reasonable step.

Getting regular sleep can help. Fatigue is a known trigger for many people with SVT. Aim for consistent sleep hours and avoid staying up late repeatedly.

Managing stress is also important. Stress activates the sympathetic nervous system, which increases heart rate. Techniques like deep breathing, meditation, or gentle yoga may help reduce the frequency of episodes, although no large trials have confirmed this.

Staying hydrated is sometimes recommended. Dehydration can lower blood volume and make the heart work harder. There is no strong evidence that hydration prevents SVT, but it is generally good for heart health.

Medical Procedures For Recurrent Episodes

If episodes are frequent or difficult to control, a cardiologist may recommend a procedure called catheter ablation. This is the most effective treatment for paroxysmal SVT.

During ablation, a doctor threads a thin tube through a blood vessel in the leg up to the heart. The doctor identifies the extra electrical pathway and destroys it with heat or cold energy. This eliminates the short circuit that causes the rapid heart rate.

Ablation has a high success rate. Most studies report that over 90 percent of people who undergo ablation are free of episodes afterward. The procedure is minimally invasive, and most people go home the same day or the next day.

Not everyone needs ablation. If your episodes are rare, short, and easily controlled with vagal maneuvers, you may choose to manage them without a procedure. The decision depends on how much the episodes affect your quality of life.

Are There Risks To Stopping The Episode Yourself?

Vagal maneuvers are generally safe, but they are not appropriate for everyone. If you have coronary artery disease, carotid artery disease, or a history of stroke, some maneuvers may carry risk. The Valsalva maneuver briefly increases pressure in the chest and can affect blood flow to the brain.

If you have been diagnosed with a heart condition other than SVT, talk to your doctor before using vagal maneuvers. Your doctor can tell you which techniques are safe for your specific situation.

Do not attempt to stop an episode yourself if you are alone and feel faint. Sit or lie down first. If you pass out during a vagal maneuver, you could injure yourself in the fall.

It is also important not to confuse paroxysmal tachycardia with other types of rapid heart rhythms. Atrial fibrillation, for example, is a different condition with different treatments. If you have not been formally diagnosed, do not assume your racing heart is SVT. See a doctor for an evaluation.