RT Book, Section
A1 Doherty, Gerard M.
SR Print(0)
ID 58092561
T1 Aortic Valve Regurgitation
T2 Quick Answers Surgery
YR 2010
FD 2010
PB The McGraw-Hill Companies
PP New York, NY
SN 
LK accesssurgery.mhmedical.com/content.aspx?aid=58092561
RD 2024/04/16
AB •  Aortic  valve  (AV):  Usually  tricuspid,  composed  of  fibrous  skeleton,  3  cusps,  and  sinuses  of  Valsalva•  Free  edge  of  each  cusp  is  concave  and  thicker,  with  fibrous  node  at  midpoint•  During  systole:  Eddy  currents  in  sinuses  of  Valsalva  prevent  occlusion  of  coronary  ostia•  During  diastole:  Cusps  fall  closed  and  coapt,  supports  ejected  column  of  blood•  Coronary  arteries  arise  from  2  of  3  sinuses  of  Valsalva•  Aortic  regurgitation  (AR)  is  caused  by  abnormal  coaptation  of  valve  leaflets,  allowing  blood  to  return  from  aorta  to  ventricle  during  diastole•  Etiology  of  chronic  AR:  -Rheumatic  dilation-Annuloaortic  ectasia-Cystic  medial  necrosis-Atherosclerosis-Syphilis-Arthritic  inflammatory  disease-Congenital  bicuspid  valve•  Etiology  of  acute  AR:  -Endocarditis-Acute  aortic  dissection-Trauma•  LV  becomes  eccentrically  hypertrophied  and  dilated