title: Biplane stress echocardiography using a prototype matrix-array transducer.
abstract: BACKGROUND
  Rapid image acquisition after cessation of exercise is essential for accurate stress echocardiography. Recently, a prototype matrix-array transducer has been developed that allows simultaneous acquisition of 2 imaging planes (biplane [BP] imaging).
  
  
  METHODS
  In all, 19 healthy volunteers underwent 2 separate stress echocardiographic studies. Images were acquired in traditional 2-dimensional or BP format pre-exercise and postexercise.
  
  
  RESULTS
  Total image acquisition time for 2-dimensional stress echocardiography was 38 +/- 8 seconds versus 29 +/- 8 seconds for BP imaging (P <.05). Heart rates were acquired closer to age-predicted maximum with BP imaging in the apical 3- and 2-chamber and parasternal long- and short-axis views (82%, 75%, 70%, 70% for BP vs 76%, 72%, 68%, 66% for 2-dimensional, respectively).
  
  
  CONCLUSIONS
  BP imaging using a recently developed matrix-array probe allows more rapid imaging postexercise, resulting in acquisition of poststress images at higher heart rates without compromising image quality.
authors.affiliation: Department of Medicine, University of Chicago, USA. kspencer@uchicago.edu
authors.forename: Lissa
authors.initials: L
authors.lastname: Sugeng
authors.forename: Jim
authors.initials: J
authors.lastname: Kirkpatrick
authors.forename: Roberto M
authors.initials: RM
authors.lastname: Lang
authors.forename: James E
authors.initials: JE
authors.lastname: Bednarz
authors.forename: Jeanne M
authors.initials: JM
authors.lastname: Decara
authors.forename: Georgeanne
authors.initials: G
authors.lastname: Lammertin
authors.forename: Kirk T
authors.initials: KT
authors.lastname: Spencer
mesh_terms: D000162:Acoustics; D000367:Age Factors; D001185:Artificial Intelligence; D025401:Echocardiography, Stress / Q000295:instrumentation*; D004867:Equipment Design; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008297:Male; D011237:Predictive Value of Tests; D012016:Reference Values; D013997:Time Factors; D014159:Transducers