Whereas someone exhibiting marked prolongation of the QT interval with QTc exceeding 500 ms who was just externally defibrillated from torsades de pointes while swimming poses negligible diagnostic ...

The QT interval is the time from the beginning of the QRS complex, representing ventricular depolarization, to the end of the T wave, resulting from ventricular repolarization. The normal QT ...

the QT interval corrected for heart rate (QTc interval) actually increased by 50 ± 30 ms. By contrast, the QT interval did not decrease in patients with LQTS (it lengthened by 4 ± 34 ms ...

This new insight about the interrelation among PERED/weight, amplitude of ECG potentials, and durations of P waves, QRS complexes, and QTc intervals in patients with CHF can be immediately ...

Because of the increased risk of TdP, dofetilide is contraindicated if the baseline QTc interval is greater than 440 msec (500 msec in patients with a ventricular conduction abnormality).

Extreme caution with MAOIs, tricyclics, or drugs known to prolong QTc interval. Antagonized by β-blockers; if needed, consider cardioselective agents. Potentiated by strong CYP450 and P-gp ...

Dr. George Shaker has huge hopes for a small radar device he developed with a team of researchers at the University of Waterloo. An engineer who has pursued the possibilities of radio waves for more ...

Due to the heart rates effects, the corrected QT interval (QTc) is frequently used. The QTc is considered prolonged if greater than 450 ms in males and 470 in females and is calculated using the ...