Fig. 4From: Impact of caffeine on myocardial perfusion reserve assessed by semiquantitative adenosine stress perfusion cardiovascular magnetic resonancea Splenic perfusion (RU) was reduced (“switch-off”) during adenosine vs. rest perfusion on all stress CMR exams, indicating adequate adenosine-induced hyperemia, irrespective of the intake of caffeine. b Likewise, the splenic perfusion ratio was not influenced by caffeine. Thus, the splenic switch-off did not allow for detection of prior caffeine consumption in this studyBack to article page