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What is severe tachycardia?

What is severe tachycardia?

In tachycardia, an abnormal electrical impulse starting in the upper or lower chambers of the heart causes the heart to beat faster. Tachycardia is the medical term for a heart rate over 100 beats per minute. There are many heart rhythm disorders (arrhythmias) that can cause tachycardia.

What tachycardia is life-threatening?

Ventricular tachycardia (VT) is a fast, abnormal heart rate. It starts in your heart’s lower chambers, called the ventricles. VT is defined as 3 or more heartbeats in a row, at a rate of more than 100 beats a minute. If VT lasts for more than a few seconds at a time, it can become life-threatening.

What happens to the heart if left untreated for tachycardia?

But if left untreated, tachycardia can disrupt normal heart function and lead to serious complications, including: Treatments, such as drugs, medical procedures or surgery, may help control a rapid heartbeat or manage other conditions contributing to tachycardia. A normal heart has two upper (receiving) and two lower (pumping) chambers.

What are the signs and symptoms of tachycardia?

No matter which type of tachycardia you have, you may feel: Dizziness. Lightheadedness. Shortness of breath. Chest pain. Heart palpitations.

What causes tachycardia on the left side of the heart?

Strenuous exercise, a fever, fear, stress, anxiety, certain medications, and street drugs can lead to sinus tachycardia. It can also be triggered by anemia, an overactive thyroid, or damage from a heart attack or heart failure. Supraventricular tachycardia is most likely to affect people who smoke, drink too much alcohol, or have a lot of caffeine.

Can you go into cardiac arrest with tachycardia?

No matter which type of tachycardia you have, you may feel: In extreme cases, you could become unconscious or go into cardiac arrest. But sometimes, a super-fast heart rate causes no symptoms at all. Electrocardiogram (ECG or EKG). This records the electrical activity in your heart and helps your doctor search for things that don’t look normal.

How is tachycardia related to other cardiac problems?

The seriousness depends largely on whether other cardiac dysfunction is present and on the degree of the ventricular tachycardia. In cases of ventricular tachycardia, electrical signals in the heart’s lower chambers fire abnormally. This interferes with electrical impulses coming from the sinoatrial (SA) node, the heart’s natural pacemaker.

No matter which type of tachycardia you have, you may feel: In extreme cases, you could become unconscious or go into cardiac arrest. But sometimes, a super-fast heart rate causes no symptoms at all. Electrocardiogram (ECG or EKG). This records the electrical activity in your heart and helps your doctor search for things that don’t look normal.

What happens if you have an episode of supraventricular tachycardia?

Over time, untreated and frequent episodes of supraventricular tachycardia may weaken the heart and lead to heart failure, particularly if you have other coexisting medical conditions. In extreme cases, an episode of supraventricular tachycardia may cause unconsciousness or cardiac arrest.

How long does it take for tachycardia to go away?

Expected Duration. How long tachycardia lasts depends on its cause. For example, tachycardia resulting from fever will go away when body temperature returns to normal. Tachycardia resulting from blood loss will end when the patient is stabilized with intravenous (IV) fluids and/or blood transfusions.