{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T23:22:16Z","timestamp":1791847336798,"version":"4.3.4"},"reference-count":36,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2023,7,18]],"date-time":"2023-07-18T00:00:00Z","timestamp":1689638400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2023,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>J\u2010waves may be observed during coronary angiography (CAG) or intracoronary acetylcholine (ACh) administration, but their significance is unknown.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Forty\u2010nine patients, 59.1\u00a0\u00b1\u00a011.5 years old and 59% male, were studied on suspicion of vasospastic angina, and J wave dynamicity was compared between CAG and Ach administration.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Diagnostic (\u22650.1\u00a0mV) or nondiagnostic (&lt;0.1\u00a0mV) J waves in 9 and 3 patients, respectively, were augmented, and J waves were newly observed in 2 patients during CAG and Ach administration. Similar changes in the J\u2010wave amplitude were observed: from 0.10\u00a0\u00b1\u00a00.09\u00a0mV to 0.20\u00a0\u00b1\u00a00.15\u00a0mV (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a0.002) and from 0.10\u00a0\u00b1\u00a00.10\u00a0mV to 0.20\u00a0\u00b1\u00a00.16\u00a0mV (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a0.001) during CAG and Ach administration, respectively. J waves were located in the inferior leads and changed only during the right coronary interventions. In the remaining 35 patients, J waves were absent before and during the coronary interventions. Augmentation of J waves was found when the RR interval was shortened in some patients. Injection of anoxic media into the coronary artery might induce a conduction delay from myocardial ischemia that manifests as augmentation or new occurrence of J waves.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Both CAG and intracoronary Ach administration affected J waves similarly in the same individuals. A myocardial ischemia\u2010induced conduction delay may be responsible for the changes in J waves, but further studies are needed.<\/jats:p><\/jats:sec>","DOI":"10.1111\/pace.14787","type":"journal-article","created":{"date-parts":[[2023,7,18]],"date-time":"2023-07-18T08:09:42Z","timestamp":1689667782000},"page":"868-874","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["J wave dynamicity during coronary angiography and intracoronary acetylcholine administration"],"prefix":"10.1111","volume":"46","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2850-7906","authenticated-orcid":false,"given":"Yoshiyasu","family":"Aizawa","sequence":"first","affiliation":[{"name":"Department of Cardiology International University of Health and Welfare Narita Hospital Narita Chiba 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