Jorge P A
Arq Bras Cardiol. 1989 Mar;52(3):129-31.
The author studied the histologic features of the intramyocardial arterioles of the dog, under various situations of vasomotricity induced by drugs. Hemodynamics were evaluated by the pressures of the right atria and the aorta and through the coronary flow. The histologic studies were done on biopsy specimens taken from the anterior left ventricular wall. The results were 1.1 (0.7-1.3) for the control state, 0.3 (0.1-0.6) for situations of vasodilatation and 1.5 (1.1-1.8) during vasoconstriction. The authors believe that the histologic appearance of the intramyocardial vessels, in the various situations of vasomotricity may represent the lower and upper limits of the autoregulatory curve.
作者研究了在药物诱导的各种血管舒缩状态下犬心肌内小动脉的组织学特征。通过右心房和主动脉压力以及冠状动脉血流量评估血流动力学。组织学研究在取自左心室前壁的活检标本上进行。对照状态下的结果为1.1（0.7 - 1.3），血管舒张状态下为0.3（0.1 - 0.6），血管收缩时为1.5（1.1 - 1.8）。作者认为，在各种血管舒缩状态下，心肌内血管的组织学表现可能代表了自动调节曲线的下限和上限。
