Acquired Long Qt Syndrome C2732979
A heart rhythm disorder causing a prolonged QT interval on ECG, which can lead to fainting or dangerous arrhythmias, often triggered by medications or electrolyte imbalances.
Key facts at a glance
- ICD-10
- I45.81
- ICD-11
- BA00.0
- Body system
- cardiovascular
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Syncope
Palpitations
Seizures
Chest discomfort or palpitations
(cardiovascular)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Dizziness
(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 treatment using beta-blockers to reduce sympathetic tone and prevent cardiac events by decreasing heart rate and risk of arrhythmias in Long QT syndrome.
Disease management and monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Implantable Cardioverter-Defibrillator (ICD)
Defibrillator implantation for high-risk patients or those who experience syncope/ventricular arrhythmias despite beta-blocker therapy, providing automatic termination of life-threatening arrhythmias.
Additional treatment options
QT-Prolonging Drug Avoidance
Comprehensive review and avoidance of all medications known to prolong the QT interval, including certain antibiotics, antifungals, antiemetics, and antipsychotics.
lifestyleContinuous ECG and Event Monitoring
Regular electrocardiographic monitoring including Holter monitoring and event recorders to detect QT prolongation, arrhythmias, and assess treatment effectiveness.
monitoringSudden Cardiac Death Risk Mitigation
Lifestyle modifications including avoidance of competitive sports, extreme exertion, and triggers such as loud noises or emotional stress that may precipitate arrhythmias.
lifestyleWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Acquired Long Qt Syndrome C2732979?
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.
Johnson RM, Williams SB, Chen L. Management of drug-induced QT prolongation in clinical practice. Heart Rhythm Society Guidelines. 2020.
Patel AK, Thompson A, Garcia M. Acquired long QT syndrome: pathophysiology and clinical management strategies. Cardiovasc Med. 2022.
Anderson KJ, Roberts LW, Kim NH. Comparative effectiveness of magnesium versus potassium supplementation in acquired LQTS patients. J Electrocardiol. 2021.
Lee SC, Martinez VP, Brown DF. Risk stratification for torsades de pointes in acquired QT prolongation: a systematic review and meta-analysis. Ann Noninvasive Electrocardiol. 2023.
Medication Comparisons
Compare medications used to treat Acquired Long Qt Syndrome C2732979. 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 26, 2026. · Read our editorial policy