title: [Effect of caffeine on myocardial blood flow during pharmacological vasodilation].
abstract: Pharmacologic stress with adenosine is frequently used for noninvasive detection of coronary artery disease. Dietary intake of caffeinated food, beverages or medications might alter adenosine-induced hyperemic blood flow, thereby compromising the diagnostic sensitivity of adenosine stress testing. In this case we report on a male patient with CAD. Myocardial blood flow at rest and during adenosine-induced hyperemia 2 hours after consumption of decaffeinated coffee and again without caffeine intake were quantified by ammonia PET. After caffeine intake there was a clearly diminished increase of myocardial blood flow during adenosine. The average coronary flow reserve in the myocardium was 1.3 after caffeine. In the baseline study without caffeine the coronary flow reserve has been improved to 2.3. Caffeine intake alters the coronary vasodilatory capacity. These findings emphasize the importance of carefully screening patients for intake of caffeinated food prior to adenosine stress testing.
authors.affiliation: Institut für Molekulare Biophysik, Radiopharmazie und Nuklearmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Ruhr-Universität Bochum, Georgstr. 11, 32545, Bad Oeynhausen, Germany. pwielepp@hdz-nrw.de
authors.forename: J P
authors.initials: JP
authors.lastname: Wielepp
authors.forename: E
authors.initials: E
authors.lastname: Fricke
authors.forename: D
authors.initials: D
authors.lastname: Horstkotte
authors.forename: W
authors.initials: W
authors.lastname: Burchert
mesh_terms: D000241:Adenosine; D002110:Caffeine / Q000494:pharmacology*; D003326:Coronary Circulation / Q000187:drug effects*; D003327:Coronary Disease / Q000000981:diagnostic imaging*; D003331:Coronary Vessels / Q000000981:diagnostic imaging / Q000187:drug effects; D004347:Drug Interactions; D006801:Humans; D006940:Hyperemia / Q000139:chemically induced* / Q000000981:diagnostic imaging; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008297:Male; D008875:Middle Aged; D049268:Positron-Emission Tomography; D014664:Vasodilation / Q000187:drug effects
chemical_list: D002110:Caffeine; D000241:Adenosine