Effect of sudden reductions of the arterial blood pressure on the mean diastolic coronary resistance.
At the beginning of a 10 sec arterial haemorrhage, vascular elasticity induces an increase of mean diastolic coronary resistance. Then, the increase is counteracted by the relaxation of the vascular musculature, which causes a coronary hyperaemia when, after the haemorrhage is arrested, the vascular wall is stretched by a sudden though slight increase of blood pressure.
D000818:Animals; D001794:Blood Pressure; D004285:Dogs; D006321:Heart / Q000503:physiopathology*; D006470:Hemorrhage / Q000503:physiopathology; D007022:Hypotension / Q000503:physiopathology*; D014655:Vascular Resistance