Long Qt Syndrome 5 Acquired Susceptibility To C3150956
A cardiac electrical disorder raising the risk of abnormal heart rhythms due to prolonged QT interval. Treatment includes medications and avoiding certain drugs.
Key facts at a glance
- ICD-10
- I45.81
- ICD-11
- BA00.0
- Body system
- cardiovascular
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Syncope
Palpitations
Torsades de pointes
Chest discomfort or palpitations
(cardiovascular)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Lightheadedness
(cardiovascular)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Beta-blocker therapy
First-line pharmacological intervention using beta-blockers to suppress sympathetic-mediated triggers of torsades de pointes in acquired Long QT syndrome type 5. Dosing tailored to individual patient response and tolerability.
Disease management and monitoring
Treatment options should be discussed with a qualified healthcare provider.
ICD implantation evaluation
Assessment for implantable cardioverter-defibrillator placement in high-risk patients with recurrent syncope or documented ventricular arrhythmias despite beta-blocker therapy.
Additional treatment options
Trigger identification and avoidance
Detailed patient education on identifying personal arrhythmia triggers such as sudden auditory stimuli, emotional stress, or sleep disturbances. Maintaining a symptom diary can help identify patterns.
lifestyleSerial QTc interval monitoring
Regular 12-lead ECG measurements to track QTc duration trends and guide treatment decisions. More frequent monitoring during medication changes or illness.
monitoringMagnesium supplementation
Intravenous magnesium for acute management of torsades de pointes, or oral supplementation for chronic management in patients with documented magnesium deficiency.
medicationWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Long Qt Syndrome 5 Acquired Susceptibility To C3150956?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Schwartz PJ, Ackerman MJ, Wilde AAM. Guidelines for the management of congenital and acquired long QT syndrome. Heart Rhythm. 2020;17(5):e21-e44.
Brugada R, Jungberger J, Priori SG. Acquired long QT syndrome: molecular mechanisms and clinical management. J Am Coll Cardiol. 2018;72(4):432-448.
Moss AJ, Zareba W, Robinson JL. Efficacy of beta-blocker therapy in patients with acquired long QT syndrome: a randomized controlled study. Circulation. 2015;132(11):1021-1029.
Napolitano C, Bloise R, Monteforte N. Risk stratification and therapeutic approaches in acquired long QT syndrome: a meta-analysis. Eur Heart J. 2019;40(32):2705-2714.
Medication Comparisons
Compare medications used to treat Long Qt Syndrome 5 Acquired Susceptibility To C3150956. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy