Measure QT and RR intervals

Correct for Heart Rate

Check QTc versus Normal Limits

Risk Factors
Genetics

Electrolytes

Brady-Arrhythmia

Poor Liver or Heart Function

Drugs

Tools and Strategies for Measuring Difficult ECGs
Artifact

Flat T-wave in Limb Leads - Use All Leads

Bi-phasic T-wave - Include Terminal Portion

Calculating QTc in the Presence of Varying Heart Rate

TP Fusion - Measuring QT in Presence of High Heart Rate

Do Not Include Normal U-waves

TP Fusion - Long PR Interval

Include U-wave When Abnormal or Unable to Separate from T-wave

T-wave Before and After Drug Effect
