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  • Title: J waves induced during coronary angiography in patients with vasospastic angina and its implication.
    Author: Kitazawa H, Sato A, Okabe M, Aizawa Y.
    Journal: J Electrocardiol; 2021; 64():99-101. PubMed ID: 33421661.
    Abstract:
    BACKGROUND: J waves may develop during coronary angiography (CAG). PATIENTS AND RESULTS: Seven patients (61±6 years, 6 male) had vasospastic angina. ST-segment elevation and ventricular fibrillation were documented in all patients. CAG revealed normal arteries, but slurring or notching (J waves) with an amplitude of 0.20±0.06 mV appeared for the first time (n=6) or in an augmented manner (n=1) with distinct alterations in QRS morphology when contrast medium was injected into the right coronary artery. CONCLUSION: In patients with vasospastic angina, J waves observed during CAG can be a manifestation of a local conduction delay caused by contrast medium-induced myocardial ischemia.
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