Addison病原发性慢性肾上腺皮质功能减退症
Af(atrialfibrillation，Af)心房颤动
AGN(acuteglomerulonephritis,AGN)急性肾小球肾炎
AIDS(AcquiredImmuno-deficiencySyndrome,AIDS)获得性免疫缺陷综合症（艾滋病）
ALL(acutelymphoblasticleukemia,ALL)急性淋巴细胞性白血病
AVB(atrioventricularblock，AVB)房室传导阻滞
ASD(AtrialSeptalDefect,ASD)房间隔缺损
AS(aorticstenosis)主动脉瓣狭窄
ASO(ArteriosclerosisObliterans)动脉硬化性闭塞症
AI(aorticin