ECG Case 076

This ECG is from a 40 yr old male who presented following a large overdose of an anti-spasmodic agent.

ECG 076 LITFL Top 100

Describe and interpret this ECG

ECG ANSWER and INTERPRETATION

Rate:

  • 66

Rhythm:

  • Sinus Arrhythmia

Axis:

  • Inferior (+90 deg)

Intervals:

  • PR – Normal (~120ms)
  • QRS – Normal (~80ms)
  • QT – 560-600ms (QTc Bazett ~ 610-630 ms)
    • Note absolute QT interval greater than 1/2 of R-R interval

Segments:

  • Up-stroked ST segment I, V2-4

Additional:

  • T Wave Inversion aVL, aVR

Interpretation:

  • Marked QT Prolongation

FURTHER READING

LITFL

Article

  • Chan A, Isbister GK, Kirkpatrick CMJ, Duffu SB. Drug-induced QT prolongation and torsades de pointes: evaluation of a QT nomogram. QJM2007 100(10):609-615 PMID: 17881416 Full text here

TOP 150 ECG SERIES



Emergency Medicine Specialist MBChB FRCEM FACEM. Medical Education, Cardiology and Web Based Resources | @jjlarkin78 | LinkedIn |

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