Whereas someone exhibiting marked prolongation of the QT interval with QTc exceeding 500 ms who was ... Owing to multiple variables interacting at any given time, patients may have different QT ...

Long QT syndrome (LQTS) is an inherited genetic disorder associated with QT prolongation on the electrocardiogram (ECG) and ventricular tachyarrhythmias that manifest as syncope, aborted cardiac ...

Medically reviewed by Mary Choy, PharmD Hydroxyzine is a commonly prescribed antihistamine medication for anxiety and ...

Conclusion: Q-T interval prolongation and TdP associated with the use of methadone are potentially fatal adverse effects. A thorough patient history and ECG monitoring are essential for patients ...

When graphed on an electrocardiogram (EKG or ECG) each heartbeat has five distinct waves ... The instructions will clarify what to do if they feel new symptoms or prolonged symptoms. Long QT syndrome ...