title: Single beat 3D echocardiography for the assessment of right ventricular dimension and function after endurance exercise: Intraindividual comparison with magnetic resonance imaging.
abstract: BACKGROUND
  Our study compares new single beat 3D echocardiography (sb3DE) to cardiovascular magnetic resonance imaging (CMR) for the measurement of right ventricular (RV) dimension and function immediately after a 30 km run. This is to validate sb3DE against the "gold standard" CMR and to bring new insights into acute changes of RV dimension and function after endurance exercise.
  
  
  METHODS
  21 non-elite male marathon runners were examined by sb3DE (Siemens ACUSON SC2000, matrix transducer 4Z1c, volume rates 10-29/s), CMR (Siemens Magnetom Avanto, 1,5 Tesla) and blood tests before and immediately after each athlete ran 30 km. The runners were not allowed to rehydrate after the race. The order of sb3DE and CMR examination was randomized.
  
  
  RESULTS
  Sb3DE for the acquisition of RV dimension and function was feasible in all subjects. The decrease in mean body weight and the significant increase in hematocrit indicated dehydration. RV dimensions measured by CMR were consistently larger than measured by sb3DE.Neither sb3DE nor CMR showed a significant difference in the RV ejection fraction before and after exercise. CMR demonstrated a significant decrease in RV dimensions. Measured by sb3DE, this decrease of RV volumes was not significant.
  
  
  CONCLUSIONS
  First, both methods agree well in the acquisition of systolic RV function. The dimensions of the RV measured by CMR are larger than measured by sb3DE. After exercise, the RV volumes decrease significantly when measured by CMR compared to baseline.Second, endurance exercise seems not to induce acute RV dysfunction in athletes without rehydration.
authors.affiliation: Charité - Universitätsmedizin Berlin, Medizinische Klinik mit Schwerpunkt Kardiologie und Angiologie, Charité Campus Mitte, Charitéplatz 1, 10117 Berlin, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schattke
authors.forename: Moritz
authors.initials: M
authors.lastname: Wagner
authors.forename: Robert
authors.initials: R
authors.lastname: Hättasch
authors.forename: Sabrina
authors.initials: S
authors.lastname: Schroeckh
authors.forename: Tahir
authors.initials: T
authors.lastname: Durmus
authors.forename: Ingolf
authors.initials: I
authors.lastname: Schimke
authors.forename: Wasiem
authors.initials: W
authors.lastname: Sanad
authors.forename: Sebastian
authors.initials: S
authors.lastname: Spethmann
authors.forename: Jürgen
authors.initials: J
authors.lastname: Scharhag
authors.forename: Alexander
authors.initials: A
authors.lastname: Huppertz
authors.forename: Gert
authors.initials: G
authors.lastname: Baumann
authors.forename: Adrian C
authors.initials: AC
authors.lastname: Borges
authors.forename: Fabian
authors.initials: F
authors.lastname: Knebel
mesh_terms: D019560:Echocardiography, Three-Dimensional; D005240:Feasibility Studies; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010807:Physical Endurance / Q000502:physiology; D012420:Running / Q000502:physiology; D016278:Ventricular Function, Right