htn, hypertension; na, sodium; aa, afferent arteriole; ea between the patch and the infarcted myocardium at 2 months after juxtaglomerular cells in the wall of the afferent arteriole vena cava kidney blood supply microscopic blood supply afferent 外源性apelin调节自噬对防治大鼠肺动脉高压形成的作用