Systole has little effect on diastolic coronary artery blood flow.

@article{Katz1988SystoleHL,
  title={Systole has little effect on diastolic coronary artery blood flow.},
  author={Steven A Katz and Eric O. Feigl},
  journal={Circulation research},
  year={1988},
  volume={62 3},
  pages={443-51}
}
The hypothesis that myocardial systolic contraction attenuates diastolic coronary flow was tested by comparing flow during diastole to flow during a prolonged asystole. The circumflex coronary artery was cannulated and perfused at constant pressure in closed-chest, morphine- and alpha-chloralose-anesthetized dogs. The heart was paced at 80, 120, 160, or 200 beats/min after atrioventricular heart block under control, intracoronary adenosine, and intravenous norepinephrine treatment conditions… CONTINUE READING

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