Tachycardia, a resting heart rate above 100 beats per minute, is treated differently depending on the type, the underlying cause, and how severe the symptoms are. Some episodes stop with simple breathing techniques you can do at home, while others require medication, a procedure to correct the heart’s electrical signals, or an implanted device. The right treatment depends on what’s driving your heart rate up in the first place.
Vagal Maneuvers: The First Thing to Try
For many episodes of supraventricular tachycardia (SVT), where the fast rhythm originates above the lower chambers of the heart, a set of physical techniques called vagal maneuvers can slow or stop the episode. These work by stimulating the vagus nerve, which acts like a brake pedal for your heart rate.
The most common technique is the Valsalva maneuver: you bear down as if straining during a bowel movement, or blow hard against a closed airway, for about 15 seconds. A modified version improves the odds of success. You perform the strain while sitting up, then quickly lie flat while someone raises your legs into the air or brings your knees to your chest. You hold that position for 30 to 45 seconds beyond the initial strain. Other options include splashing ice-cold water on your face or coughing forcefully.
In a medical setting, a provider may try carotid sinus massage, pressing on the carotid artery in your neck for five to ten seconds. If one side doesn’t work, they can try the other after a brief pause. These maneuvers are worth attempting early because they’re safe, free, and sometimes all you need.
Medications for Acute Episodes
When vagal maneuvers don’t break the rhythm, the next step in a hospital or emergency setting is medication delivered through an IV. The specific drug depends on the type of tachycardia.
For narrow-complex tachycardias (the most common fast rhythms originating above the ventricles), a drug that temporarily blocks the electrical relay station between the upper and lower chambers of the heart works rapidly. It has very high conversion rates for the most common SVT types. The effect is brief, lasting only seconds, which means it’s very safe but also means the rhythm can sometimes return.
If the rhythm comes back, longer-acting calcium channel blockers are often used instead. IV versions of these drugs convert SVT to a normal rhythm in 64% to 98% of patients. They’re especially useful for recurrent episodes but must be given slowly because they can lower blood pressure. Beta-blockers, which reduce heart rate by blunting the effects of adrenaline, are another option for stable patients. Both drug classes are avoided in people with heart failure or very low blood pressure.
For atrial fibrillation or atrial flutter, the goal shifts from stopping the rhythm entirely to controlling the heart rate. Beta-blockers and calcium channel blockers are the standard choices for this, sometimes given as a continuous drip to maintain control.
Fixing the Electrical Problem: Catheter Ablation
If tachycardia keeps coming back, a procedure called catheter ablation can often provide a permanent fix. A thin, flexible tube is threaded through a blood vessel (usually in the groin) up to the heart. The tip of the catheter delivers heat or cold to destroy the tiny patch of tissue causing the abnormal electrical signals.
For most types of SVT, ablation has a 90% to 95% success rate. Recurrence happens in roughly 2% to 11% of cases, sometimes requiring a second procedure. The procedure typically takes a few hours, and most people go home the same day or the next morning. Recovery involves a few days of taking it easy and avoiding heavy lifting while the catheter insertion site heals.
Ablation is commonly recommended for people with Wolff-Parkinson-White syndrome (an extra electrical pathway in the heart), recurrent SVT, and certain types of atrial flutter. It’s less straightforward for atrial fibrillation, where the abnormal signals come from multiple areas, but it remains an option when medications fail.
Long-Term Medications
Not everyone needs or wants a procedure. Daily medications can keep heart rate under control for people with recurring tachycardia. Beta-blockers are the most widely prescribed option, reducing resting heart rate and blunting the heart’s response to stress and exertion.
For inappropriate sinus tachycardia, a condition where the heart runs fast for no clear reason, a medication that specifically slows the heart’s natural pacemaker cells offers an alternative. In a study of patients who hadn’t responded to other treatments, this drug reduced resting heart rate from an average of about 114 beats per minute down to around 87 during daily activities, outperforming a standard beta-blocker. Seventy percent of patients on the drug were free of symptoms, and they also tolerated exercise better, achieving higher levels of exertion than they could on the beta-blocker. The key advantage is that it lowers heart rate without dropping blood pressure or causing the fatigue that beta-blockers sometimes produce.
Implanted Devices for Dangerous Rhythms
Some forms of tachycardia originate in the lower chambers of the heart (ventricular tachycardia or ventricular fibrillation) and can be life-threatening. When these rhythms are sustained or cause loss of consciousness, an implantable cardioverter-defibrillator (ICD) is often recommended. This small device, placed under the skin near the collarbone, continuously monitors heart rhythm. If it detects a dangerous fast rhythm, it delivers a shock to reset the heart.
ICDs are considered for people who have survived a cardiac arrest, those with sustained ventricular tachycardia, and certain patients with significantly reduced heart pumping function due to heart disease or cardiomyopathy. The decision involves weighing the severity of the rhythm problem, the underlying heart condition, and whether the cause is reversible.
Identifying and Treating the Underlying Cause
Tachycardia is often a symptom rather than a standalone problem. Treating the root cause can resolve the fast heart rate entirely, making other interventions unnecessary.
Electrolyte imbalances are a well-known trigger. Potassium levels below 3.5 mEq/L can produce dangerous heart rhythm changes, particularly in people taking certain heart medications. Magnesium levels below 1.3 mEq/L are linked to a specific type of ventricular tachycardia called torsades de pointes. When both minerals are low simultaneously, the risk of severe arrhythmias climbs further. Correcting these levels, sometimes with IV supplementation in urgent cases or oral supplements for milder deficiencies, can eliminate the rhythm problem.
Other reversible causes include an overactive thyroid, dehydration, fever, anemia, and infections. Addressing these conditions typically brings the heart rate back to normal without any heart-specific treatment.
Lifestyle Triggers Worth Addressing
Caffeine, nicotine, and alcohol are commonly cited triggers, though the evidence varies. Caffeine sensitivity is highly individual. Some people notice palpitations after a single cup of coffee, while others tolerate several with no effect. If you notice a pattern, reducing intake is a reasonable first step.
Alcohol’s relationship with tachycardia is clearest during binge drinking. In a study of young adults monitored with continuous heart tracings, blood alcohol levels at or above the binge threshold (roughly four drinks for women, five for men in two hours) produced a significant heart rate increase, peaking at an average of 97 beats per minute about four hours after consumption, along with a measurable increase in episodes of atrial tachycardia. Routine moderate drinking does not appear to substantially influence supraventricular or ventricular tachycardia risk based on current evidence.
Nicotine stimulates adrenaline release and directly raises heart rate. For people with tachycardia, quitting tobacco and nicotine products removes one of the most consistent chemical triggers. Beyond substances, poor sleep, high stress, and decongestant medications (commonly found in cold and allergy products) can all provoke episodes.
When Tachycardia Is an Emergency
Most tachycardia episodes are uncomfortable but not dangerous. However, certain signs indicate the heart is failing to pump effectively and require immediate medical attention: difficulty breathing, chest pain, feeling faint or dizzy, or a sensation of your heart pounding. If someone collapses or loses consciousness, they may be in ventricular fibrillation, which requires CPR and emergency defibrillation to survive. In the emergency department, electrical cardioversion (a controlled shock delivered through pads on the chest) can reset the rhythm when medications aren’t working fast enough or the patient is unstable.