Feedback control of multiple hemodynamic variables with multiple cardiovascular drugs.
The ultimate goal of disease treatment is to control the biological system beyond the native regulation to combat pathological process. To maximize the advantage of drugs, we attempted to pharmacologically control the biological system at will, e.g., control multiple hemodynamic variables with multiple cardiovascular drugs. A comprehensive physiological cardiovascular model enabled us to evaluate cardiovascular properties (pump function, vascular resistance, and blood volume) and the feedback control of these properties. In 12 dogs, with dobutamine (5+/-3 mug.kg(-1).min(-1)), nitroprusside (4+/-2 mug.kg(-1).min(-1)), dextran (2+/-2 ml.kg(-1)), and furosemide (10 mg in one, 20 mg in one), rapid, sufficient and stable control of pump function, vascular resistance and blood volume resulted in similarly quick and stable control of blood pressure, cardiac output and left atrial pressure in 5+/-7, 7+/-5, and 12+/-10 minutes, respectively. These variables remained stable for 60 minutes (RMS 4+/-3 mmHg, 5+/-2 ml.min(-1).kg(-1), 0.8+/-0.6 mmHg, respectively).
Sugimachi
Masaru
M
National Cardiovascular Center Research Institute, Suita, Osaka 5658565, Japan. su91mach@ri.ncvc.go.jp
Uemura
Kazunori
K
Kamiya
Atsunori
A
Shimizu
Shuji
S
Inagaki
Masashi
M
Shishido
Toshiaki
T
D000318:Adrenergic beta-Agonists / Q000494:pharmacology; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects*; D001810:Blood Volume / Q000187:drug effects*; D002302:Cardiac Output / Q000187:drug effects*; D002320:Cardiovascular Physiological Phenomena / Q000187:drug effects; D003911:Dextrans / Q000494:pharmacology; D004280:Dobutamine / Q000494:pharmacology*; D004285:Dogs; D007839:Functional Laterality; D005665:Furosemide / Q000494:pharmacology; D006325:Heart Atria / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects / Q000502:physiology*; D007700:Kinetics
D000318:Adrenergic beta-Agonists; D003911:Dextrans; D004280:Dobutamine; D005665:Furosemide