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- Acquired long QT syndrome: Definitions, pathophysiology, and . . . - UpToDate
Before puberty, a QTc <450 ms is considered normal, between 450 and 459 borderline, and ≥460 prolonged After puberty in males, a QTc between 460 and 469 is borderline and ≥470 is considered prolonged In post-pubertal females, 460 to 479 is borderline and ≥480 ms is considered prolonged
- QTc: how long is too long? - PMC
This review discusses the components of accurate QTc measurement and diagnosis, re-examines what is known about factors affecting QT interval measurement, and clarifies current recommendations regarding diagnosis of so-called “borderline” QT interval prolongation
- Long QT Syndrome - StatPearls - NCBI Bookshelf
Cardiac events and fatal arrhythmias may occur when the QT interval is prolonged either congenitally or through acquired causes This activity reviews the causes of QT prolongation and highlights the role of the interprofessional team in its management Objectives: Identify the etiology of prolonged QT syndrome
- What Does Prolonged QT Indicate? Causes, Symptoms, Triggers
Long QT syndrome (LQTS) is typically referred to as a corrected QT interval that exceeds 440 ms in men and 460 ms in women on a resting electrocardiogram Multiple factors have been implicated in causing prolonged QT intervals, including:
- Long QT Syndrome: Symptoms Treatment - Cleveland Clinic
Long QT syndrome is a problem with the electrical system in your heart taking too long to recharge This issue can lead to a life-threatening type of abnormal heart rhythm People can inherit or acquire long QT syndrome Most people take medication for long QT Others may need a device or surgery to lower their risk of abnormal heart rhythms
- Long QT (QTc) interval, long QT syndrome (LQTS) torsades de pointes
Long QT syndrome (LQTS) is manifest when a long QT interval induces ventricular arrhythmias Figure 1 The QT interval on the ECG The QT interval is inversely related to heart rate As the heart rate increases, the QT interval decreases and vice versa
- Long QT syndrome - Diagnosis and treatment - Mayo Clinic
If the interval takes longer than usual to happen, it's called a prolonged QT interval An ideal QT interval depends on your age, your sex and your personal heart rate In people who have a LQTS complication called torsades de pointes, the waves on the ECG results look twisted
- Long QT Syndrome: Symptoms Treatment | Mass General Brigham
Long QT syndrome occurs when the heart takes too long to recharge between beats, creating a longer-than-normal QT interval, or a prolonged QT interval A healthy heart beats at a regular rhythm Steady electrical signals tell the heart when to contract and when to recharge On an electrocardiogram (EKG or ECG), these signals appear as waves
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