title: Transesophageal echocardiography values for left ventricular end-diastolic area and pulmonary vein and mitral inflow Doppler velocities in patients undergoing coronary artery bypass graft surgery.
abstract: OBJECTIVE
  To determine left ventricular end-diastolic area (EDA) and pulmonary vein and mitral inflow Doppler velocities in patients undergoing coronary artery bypass graft (CABG) surgery using transesophageal echocardiography (TEE). To examine the effects of age, sex, and left ventricular function on these values.
  
  
  METHODS
  Prospective observational study; all measurements performed before cardiopulmonary bypass.
  
  
  METHODS
  Tertiary referral teaching hospital.
  
  
  METHODS
  Eighty-six elective CABG surgery patients.
  
  
  METHODS
  Intraoperative TEE was performed in all patients.
  
  
  RESULTS
  The left ventricular EDA was measured at the midpapillary level, excluding the papillary muscles. Mean EDA for patients with normal left ventricular function, defined by fractional area change (FAC) 0.50 or greater, was 10.66 cm2 and when indexed to body surface area was 5.6 cm2/m2. The EDA was greater in patients with impaired left ventricular function (FAC < 0.50). Mean EDA was 14.84 cm2, and EDA/body surface area was 7.8 cm2/m2. In patients with FAC 0.50 or greater, mean peak pulmonary vein Doppler velocities were 46.10 cm/sec (systole), 31.71 cm/sec (diastole), and 1.50 (ratio systole to diastole). Mean peak mitral inflow Doppler velocities were 57.25 cm/sec (early diastole), 57.21 cm/sec (late diastole), and 1.10 (ratio early to late), and deceleration time was 216 msec. Age, sex, and left ventricular function were not significant predictors of Doppler variables.
  
  
  CONCLUSIONS
  Values are presented for a predominantly white population undergoing cardiac surgery. Left ventricular dysfunction is associated with increased left ventricular EDA measurements.
authors.affiliation: Department of Anaesthesiology, The Royal Melbourne Hospital, Victoria, Australia.
authors.forename: C F
authors.initials: CF
authors.lastname: Royse
authors.forename: M J
authors.initials: MJ
authors.lastname: Barrington
authors.forename: A G
authors.initials: AG
authors.lastname: Royse
mesh_terms: D000368:Aged; D000758:Anesthesia; D001026:Coronary Artery Bypass / Q000379:methods*; D015150:Echocardiography, Doppler; D017548:Echocardiography, Transesophageal; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000502:physiology*; D011446:Prospective Studies; D011667:Pulmonary Veins / Q000000981:diagnostic imaging / Q000502:physiology*; D016277:Ventricular Function, Left / Q000502:physiology*