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A memorable experience.

Ken Monahan1, Walter Clair, Dan M Roden

  • 1Division of Cardiovascular Medicine, Vanderbilt University Medical Center, 383 Preston Research Building/2220 Pierce Avenue, Nashville, TN 37232, USA. ken.monahan@vanderbilt.edu

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|October 9, 2007
PubMed
Summary
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Cardiac memory, a transient ECG phenomenon mimicking ischaemia, arises from aberrant ventricular activation. This case highlights T-wave memory in ischaemic cardiomyopathy following ventricular tachycardia triggered by an insect bite.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Case Reports

Background:

  • Cardiac memory is an electrocardiographic (ECG) phenomenon.
  • It results from abnormal ventricular activation patterns.
  • These patterns can transiently mimic signs of myocardial ischaemia on an ECG.

Observation:

  • A patient with ischaemic cardiomyopathy was studied.
  • The patient experienced multiple episodes of non-sustained ventricular tachycardia.
  • These tachycardia episodes were triggered by an insect bite.

Findings:

  • The patient exhibited clear evidence of T-wave memory.
  • This cardiac memory phenomenon occurred in the context of the ventricular tachycardia episodes.
  • The insect bite served as the trigger for the tachycardia and subsequent memory effect.

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Implications:

  • This case illustrates a rare trigger for cardiac memory.
  • It underscores the importance of considering aberrant activation in ECG interpretation.
  • Understanding cardiac memory mechanisms is crucial for differentiating it from true ischaemia.