{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,4]],"date-time":"2026-07-04T16:12:43Z","timestamp":1783181563146,"version":"3.54.6"},"reference-count":12,"publisher":"Oxford University Press (OUP)","issue":"7","license":[{"start":{"date-parts":[[2022,6,28]],"date-time":"2022-06-28T00:00:00Z","timestamp":1656374400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,7,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>Although there are many negative reports on coffee consumption and the occurrence of atrial fibrillation (AF), several factors are involved in the metabolism of caffeine, and it is possible that the response to caffeine changes with age. We present a case in which Apple Watch was useful in detecting very brief paroxysmal AF that was thought to be triggered by coffee consumption.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Case summary<\/jats:title>\n                  <jats:p>The patient was a man in his early 60s. He often drank a cup of coffee after breakfast. At some point, after drinking coffee and commuting to work, he noticed palpitations. He got an Apple Watch, and when he recorded his electrocardiogram when the symptoms occurred, he found that he had AF. During the following month, the frequency of AF was examined in relation to whether coffee was consumed in the morning. Twenty days of 28 days, coffee was consumed, and of these, AF was observed on 8 days (40%). In the 8 days when he did not drink coffee, there was no AF. For the next 28 days, the coffee was changed to decaffeinated coffee and the frequency of AF was examined. AF was observed on 5 of the 24 days when decaffeinated coffee was consumed (21%). AF did not occur on the 4 days when decaffeinated coffee was not consumed.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Discussion<\/jats:title>\n                  <jats:p>These results may indicate that AF was significantly more common on days when coffee was consumed. In the case of frequent but short-lasting AF, it is worth considering whether coffee consumption may be a trigger.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/ehjcr\/ytac252","type":"journal-article","created":{"date-parts":[[2022,6,28]],"date-time":"2022-06-28T02:45:06Z","timestamp":1656384306000},"source":"Crossref","is-referenced-by-count":1,"title":["Apple Watch is useful in demonstrating coffee-triggered atrial fibrillation with a very short duration: a case report"],"prefix":"10.1093","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7514-6600","authenticated-orcid":false,"given":"Akira","family":"Itoh","sequence":"first","affiliation":[{"name":"Department of Cardiology, HITO Medical Center , 788-1, Kamibuncho, Shikokuchuo City, Ehime , Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2022,6,28]]},"reference":[{"key":"2022070817475416000_ytac252-B1","doi-asserted-by":"crossref","first-page":"1383","DOI":"10.1136\/heartjnl-2013-303950","article-title":"Caffeine does not increase the risk of atrial fibrillation: a systematic review and meta-analysis of observational studies","volume":"99","author":"Caldeira","year":"2013","journal-title":"Heart"},{"key":"2022070817475416000_ytac252-B2","doi-asserted-by":"crossref","first-page":"448","DOI":"10.1016\/j.cjca.2013.12.026","article-title":"Caffeine intake and atrial fibrillation incidence: dose response meta-analysis of prospective cohort studies","volume":"30","author":"Cheng","year":"2014","journal-title":"Can J Cardiol"},{"key":"2022070817475416000_ytac252-B3","doi-asserted-by":"crossref","first-page":"106","DOI":"10.1159\/000489843","article-title":"Does caffeine consumption increase the risk of new-onset atrial fibrillation?","volume":"140","author":"Abdelfattah","year":"2018","journal-title":"Cardiology"},{"key":"2022070817475416000_ytac252-B4","doi-asserted-by":"crossref","first-page":"e29","DOI":"10.1093\/eurjpc\/zwaa130","article-title":"Coffee consumption and risk of coronary artery disease","volume":"29","author":"Zhang","year":"2022","journal-title":"Eur J Prev Cardiol"},{"key":"2022070817475416000_ytac252-B5","doi-asserted-by":"crossref","first-page":"479","DOI":"10.1093\/oxfordjournals.aje.a115684","article-title":"Coffee use prior to myocardial infarction restudied: heavier intake may increase the risk","volume":"132","author":"Klatsky","year":"1990","journal-title":"Am J Epidemiol"},{"key":"2022070817475416000_ytac252-B6","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1016\/j.numecd.2006.07.013","article-title":"Coffee consumption and risk of coronary heart disease: a meta-analysis","volume":"17","author":"Sofi","year":"2007","journal-title":"Nutr Metab Cardiovasc Dis"},{"key":"2022070817475416000_ytac252-B7","doi-asserted-by":"crossref","first-page":"2944","DOI":"10.1161\/CIRCULATIONAHA.107.712976","article-title":"Coffee consumption and risk of cardiovascular events after acute myocardial infarction: results from the GISSI (Gruppo Italiano per lo Studio della Sopravvivenza nell\u2019Infarto miocardico)-Prevenzione trial","volume":"116","author":"Silletta","year":"2007","journal-title":"Circulation"},{"key":"2022070817475416000_ytac252-B8","doi-asserted-by":"crossref","first-page":"2045","DOI":"10.1161\/CIRCULATIONAHA.105.598664","article-title":"Coffee consumption and coronary heart disease in men and women: a prospective cohort study","volume":"113","author":"Lopez-Garcia","year":"2006","journal-title":"Circulation"},{"key":"2022070817475416000_ytac252-B9","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1007\/BF01061844","article-title":"Comparative pharmacokinetics of caffeine in young and elderly men","volume":"11","author":"Blanchard","year":"1983","journal-title":"J Pharmacokinet Biopharm"},{"key":"2022070817475416000_ytac252-B10","doi-asserted-by":"crossref","first-page":"258","DOI":"10.1067\/mcp.2000.104617","article-title":"Effect of age and smoking on in vivo CYP1A2, flavin-containing monooxygenase, and xanthine oxidase activities in Koreans: determination by caffeine metabolism","volume":"67","author":"Chung","year":"2000","journal-title":"Clin Pharmacol Ther"},{"key":"2022070817475416000_ytac252-B11","article-title":"Importance of pharmacogenetic and environmental factors for variation in caffeine disposition: with special emphasis on CYP1A2, CYP2A6, NAT2 and Xo","author":"Djordjevic","year":"2012"},{"key":"2022070817475416000_ytac252-B12","doi-asserted-by":"crossref","first-page":"702","DOI":"10.1161\/CIRCULATIONAHA.119.044126","article-title":"Accuracy of Apple Watch for detection of atrial fibrillation","volume":"141","author":"Seshadri","year":"2020","journal-title":"Circulation"}],"container-title":["European Heart Journal - 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