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Living with Short QT syndrome

A heart rhythm condition in which the heart muscle recharges too quickly between beats.

Understanding Short QT syndrome

Short QT syndrome is a condition that can disrupt the heart's normal rhythm (arrhythmia).

In people with this condition, the heart muscle takes less time than usual to recharge between beats. An electrocardiogram (EKG) shows this as an unusually short QT interval. Without treatment, the rhythm problems can cause symptoms from dizziness and fainting (syncope) to more serious heart events. Symptoms can start any time from early infancy to old age, and some people never have health problems from it.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Pounding or fluttering heartbeat (palpitations)
  • Irregular heartbeat from the upper chambers (atrial fibrillation)
  • Slow heartbeat (bradycardia)
  • Fainting spells (less common)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists and heart and blood vessel specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    SADS Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Genetic specialists (geneticists); Heart and blood vessel specialists (cardiologists)
Expert care
Expert lists: SADS Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with SADS Foundation
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which tests, such as an EKG, confirm short QT syndrome?
Could genetic testing help my family members?
Which heart rhythm specialist should I see?

Quick facts

Symptoms usually startany time in life
InheritanceAutosomal Dominant

GARD says changes in genes cause this condition, but it doesn't list a gene. It is inherited in an autosomal dominant pattern, meaning one changed copy of a gene is enough.

Genetic

Also known as: familial short qt syndrome; genetic short qt syndrome; sqts; ventricular arrhythmia associated with short qt syndrome

Patient organizations

Source: NIH GARD · Short QT syndromeGARD ID 16650 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Short QT syndrome.

Explore the Short QT syndrome blog

Explore research for Short QT syndrome

Explore actively recruiting Short QT syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Short QT syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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