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# What does prolonged QT on ECG mean?

## What does prolonged QT on ECG mean?

A prolonged QT interval is an irregular heart rhythm that can be seen on an electrocardiogram. It reflects a disturbance in how the heart’s bottom chambers (ventricles) send signals. In a prolonged QT interval, it takes longer than usual for the heart to recharge between beats.

What is considered a long QT?

Even the latest 2009 AHA/ACCF/HRS Recommendations for the Standardization and Interpretation of the Electrocardiogram states that a QTc ≥450 ms (males) and ≥460 ms (females) “be considered a prolonged QT interval”.

What happens if QT interval too long?

What can happen if the QT interval is too long? If the QT interval lasts longer than 0.50 second (500 milliseconds), then a patient’s heart rhythm is more likely to progress into TdP, an irregular chaotic heartbeat that’s a type of polymorphic ventricular tachycardia (VT).

### Can long QT cause chest pain?

If ventricular arrhythmias do occur as a result of LQTS, some symptoms may include: Chest fluttering (palpitations) Shortness of breath or chest pain. Lightheadedness that comes and goes.

Can long QT cause high blood pressure?

Prolonged QT interval is associated with blood pressure rather than left ventricular mass in spontaneously hypertensive rats. Clin Exp Hypertens. 2008 Oct;30(7):475-85. doi: 10.1080/10641960802443399.

Can long QT come and go?

#### How do I fix my QT interval?

Corrected QT interval (QTc)

1. Bazett formula: QTC = QT / √ RR.
2. Fridericia formula: QTC = QT / RR. 1/3
3. Framingham formula: QTC = QT + 0.154 (1 – RR)
4. Hodges formula: QTC = QT + 1.75 (heart rate – 60)

Can you live a normal life with long QT?

What happens if it is not treated? LQTS is usually a lifelong condition. The risk of having an abnormal heart rhythm that leads to fainting or cardiac arrest may lessen as you get older, especially in men after age 40. However, the risk never completely goes away.

Does long QT go away?

Congenital long QT syndrome can be treated, but it can’t be “cured” and won’t go away on its own. Acquired long QT syndrome usually stops if the cause (like certain medicines) goes away.

## Does long QT cause chest pain?

Can long QT be cured?

Some forms of long QT syndrome result from altered DNA that is passed down through families (inherited). If an underlying medical condition or medication causes it, it’s called acquired long QT syndrome. This type of long QT syndrome is usually reversible when the underlying cause is identified and treated.

Does long QT make you tired?

What happens if I develop Long QT syndrome? Even when an ECG shows a long QT interval, many people never have severe heart problems and are able to live a normal life. However, some people develop symptoms, such as fainting, dizziness, fatigue, and heart palpitations.

### What conditions cause long QT?

Long QT syndrome is usually caused by a faulty gene inherited from a parent. The abnormal gene affects the heart’s electrical activity. Certain medicines can also trigger long QT syndrome, including some types of: antibiotics.

Does Long QT cause chest pain?

Does long QT get worse with age?

QTc generally increases with age, and age-related electrophysiological and structural changes may increase the risk of potentially life-threatening arrhythmic events.

#### Can you drive with long QT syndrome?

You must not drive if you’ve suffered from: loss of consciousness or fainting. another cardiovascular condition that might affect your ability to drive safely – you must check with your doctor before you drive.

Can Long QT be cured?

Can Long QT go away?