2024年10月8日 · Normal QTc values. QTc is prolonged if > 440ms in men or > 460ms in women; QTc > 500 is associated with an increased risk of torsades de pointes; QTc is abnormally …

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 …

2024年7月19日 · Long QT syndrome can cause sudden fainting and seizures. Young people with LQTS syndrome have a higher risk of sudden cardiac death. Treatment for long QT syndrome …

2022年12月26日 · QTc is prolonged if it is greater than 440 ms in men or greater than 460 ms in women. A QTc greater than 500 is associated with an increased risk of torsade de pointes. …

Long QT syndrome (LQTS) is a cardiac conduction disorder characterized by prolongation and increased dispersion of ventricular repolarization, manifested by lengthening of the QT interval …

2007年2月20日 · The QTc is considered prolonged if the values are greater than 450 milliseconds in males and greater than 470 milliseconds in females. 3 The risk of cardiac events correlates …

2023年12月22日 · QT prolongation occurs when the heart muscle takes longer to contract and relax than usual. It can affect heart rhythms and lead to sudden cardiac arrest.

Long QT syndrome is principally diagnosed by measuring the QT interval corrected for heart rate (QTc) on a 12-lead electrocardiogram (ECG). Long QT syndrome is associated with a …

2023年3月20日 · 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. …

2024年7月19日 · In a prolonged QT interval, it takes longer than usual for the heart to recharge between beats. A prolonged QT interval can be seen on a heart test called an …