Adenosine Deaminase in Stroma-Free Hemoglobin Solution is Not Responsible for Coronary Vasoconstriction
One of us (Biro, 1982), using an unmodified preparation of stroma-free hemoglobin solution (SFHS) to hemodilute dogs, observed that coronary blood flow was inadequate to maintain normal coronary sinus pO2. In view of the likely involvement of adenosine in flow autoregulation of the coronary circulation (Berne, 1980) and of the presence of significant concentrations of adenosine deaminase (ADA) in human red blood cells (Lerner et al., 1970), the suggestion was made (Biro, 1982) that ADA activity in SFHS may have interfered with endogenous adenosine and thereby prevented adequate coronary vasodilation.
KeywordsPerfusion Pressure Coronary Blood Flow Adenosine Deaminase Coronary Perfusion Pressure Coronary Vasoconstriction
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