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. Author manuscript; available in PMC: 2019 Aug 2.
Published in final edited form as: Basic Res Cardiol. 2018 Aug 2;113(5):33. doi: 10.1007/s00395-018-0691-0

Fig. 4.

Fig. 4

Relationship between coronary zero-flow pressure (Pzf) and coronary autoregulatory capacity. a Coronary Pzf was closely related to coronary vascular resistance as CPP was lowered from 140 to 40 mmHg in all groups: control (n = 7); hemodilution (n = 6); hemodilution + dobutamine (n = 5). b Changes in coronary blood flow (20 mmHg increments) remained modest at Pzf > 20 mmHg and significantly decreased below this threshold value. c Autoregulatory gain (CPP ranging from 120 to 60 mmHg) was positively correlated with coronary Pzf