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J waves induced during coronary angiography in patients with vasospastic angina and its implication

Hitoshi Kitazawa1, Akinori Sato1, Masaaki Okabe1

  • 1Department of Cardiology, Tachikawa General Hospital, Japan.

Journal of Electrocardiology
|January 9, 2021
PubMed

Insights

J waves during coronary angiography (CAG) may indicate myocardial ischemia in vasospastic angina patients. This finding suggests a local conduction delay, aiding in diagnosis and understanding cardiac events.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Diagnostic Imaging

Background:

  • J waves are an electrocardiographic phenomenon that can occur during cardiac procedures.
  • Coronary angiography (CAG) is a common diagnostic tool for evaluating coronary artery disease.

Purpose of the Study:

  • To investigate the occurrence and significance of J waves during CAG in patients with vasospastic angina.

Main Methods:

  • Observation of J waves during CAG in seven patients with vasospastic angina.
  • Analysis of electrocardiographic changes, including ST-segment elevation and QRS morphology alterations.
  • Correlation of J wave appearance with contrast medium injection into the right coronary artery.

Main Results:

  • J waves were observed in all seven patients during CAG.
  • These waves appeared with contrast injection, often associated with ST-segment elevation and ventricular fibrillation.
  • Distinct QRS morphology alterations accompanied the J waves, suggesting a conduction delay.

Conclusions:

  • J waves observed during CAG in vasospastic angina patients can signify local conduction delay.
  • This delay is likely induced by myocardial ischemia from the injected contrast medium.
  • J waves may serve as a diagnostic marker for contrast-induced ischemia in this patient population.
Abstract

Keywords:
Conduction delayContrast mediumCoronary angiographyJ wavesMyocardial ischemia

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