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Fig. 1 | Journal of Cardiovascular Magnetic Resonance

Fig. 1

From: Impact of caffeine on myocardial perfusion reserve assessed by semiquantitative adenosine stress perfusion cardiovascular magnetic resonance

Fig. 1

a) Myocardial and splenic perfusion was assessed by semiquantitative analysis. b) Signal intensity-over-time curves were generated for the LV blood-pool (red curve), 16 myocardial (American Heart Association (AHA)-) segments representative for the left ventricular (LV) myocardium (blue curve = ischemic segment; green curve = remote segment) and the spleen (orange curve). Maximum upslope (dashed lines) of each curve was determined by linear fitting. Myocardial and splenic relative upslope (RU) was calculated by dividing the maximum upslope of the myocardial/splenic signal intensity curve through the maximum upslope of the LV-blood-pool curve. Myocardial perfusion reserve index (MPRI) and splenic perfusion reserve (SPR) represent the ratio of stress and rest perfusion

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