[Functional state characteristics of the heart in measured coronary blood flow limitation to varying degrees].
The consequences of three different degrees of restricted circulation (by 30%, 50%, and 70%) in the circumflex branch of the left coronary artery were studied in experiments on dogs in which partial strictly dosed reduction of coronary blood flow was reproduced without opening the thoracic cavity. In most cases, the first two degrees of blood flow restriction were not attended by the natural changes in the contractile function of the heart, its decrease in particular, in the first 30 minutes. In 70% restriction of blood flow, on the contrary, moderate diminution of the contractile function of the heart begins to be manifested in most of the cases despite the fact that there is no progressive deterioration in general hemodynamics.
D000818:Animals; D003326:Coronary Circulation; D003327:Coronary Disease / Q000503:physiopathology*; D004285:Dogs; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006439:Hemodynamics; D013997:Time Factors
Osobennosti funktsional'nogo sostoianiia serdtsa pri dozirovannom ogranichenii koronarnogo krovotoka razlichnoĭ stepeni.