QT Prolongation: More than meets the eye

QT prolongation can be a result of either prolonged T wave or from elongation of ST segment.  Dr. Mattu walks us through a few differentials for each.

Prolonged QT from elongated T wave

• Hypokalemia, Hypomagnesemia
• Sodium channel blocking medications
• Elevated ICP
• Cardiac Ischemia
• Congenital

Prolonged QT from elongated ST segment

• Hypocalcemia
• Hypothermia

Also check out this post from LITFL for a list of drugs causing prolonged QT or just a refresher on understanding the QT segment on ECG.

Copa Cardiogram #56