[Myogenic constriction of myocardial arterial vessels following an increase in the pulsations of coronary perfusion pressure].
In isolated cat hearts, increase of coronary pulse pressure without change of the mean coronary perfusion pressure was followed by constriction of coronary arteries. The analysis of data eliminated extravascular (contractile activity of the heart, tissue pressure) and metabolic factors as a possible cause of the coronary arterial constriction. This leaves out that the observed reaction of myocardial vessels was a result of the coronary arterial smooth muscle contraction in response to the distending action of the increased pulse pressure.
D000818:Animals; D001794:Blood Pressure; D002415:Cats; D003250:Constriction; D003331:Coronary Vessels / Q000502:physiology*; D011674:Pulse
Miogennaia konstriktsiia arterial'nykh sosudov miokarda pri uvelichenii pul'satsiĭ koronarnogo perfuzionnogo davleniia