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Evaluation of left ventricular performance during supine exercise by transoesophageal M-mode echocardiography in normal subjects.
  1. M Matsumoto,
  2. P Hanrath,
  3. P Kremer,
  4. C Tams,
  5. B A Langenstein,
  6. M Schlüter,
  7. R Weiter,
  8. W Bleifeld

    Abstract

    In order to evaluate left ventricular function during dynamic exercise transoesophageal M-mode recordings of the left ventricle were carried out with a newly developed transducer gastroscope system. Twelve healthy subjects performed a graded supine bicycle exercise test. Stable and good quality images of the left ventricle at rest and during exercise at different steps up to a maximum workload of 100 watts were obtained in all patients. Isotonic maximum exercise resulted in a significant increase in fractional shortening of the left ventricle, peak shortening rate, and peak lengthening rate of the left ventricular minor axis. Left ventricular end-diastolic dimension decreased significantly. With increasing workload the pressure rate product increased significantly. It is concluded that transoesophageal M-mode echocardiography is a useful method of evaluating left ventricular performance during dynamic exercise.

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