The mosaic theory states that multiple factors sustain elevated bp even though an aberration of only one was initially responsible ; eg , the interaction between the sympathetic nervous system and the renin - angiotensin - aldosterone system 镶嵌理论认为,有多种因素使血压维持在升高位置,尽管最初起作用的异常因素只有一个,如交感神经系统和肾素-血管紧张素-醛固酮之间的相互作用。