Evaluation of right atrial appendage blood flow by transesophageal echocardiography in subjects with a normal heart


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Bilge M., Eryonucu B., Guler N., Asker M.

JAPANESE HEART JOURNAL, vol.40, no.5, pp.599-607, 1999 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 5
  • Publication Date: 1999
  • Doi Number: 10.1536/jhj.40.599
  • Title of Journal : JAPANESE HEART JOURNAL
  • Page Numbers: pp.599-607

Abstract

Right atrial appendage (RAA) blood flow pattern was analyzed in 42 normal subjects without cardiovascular disease (aged 30 to 48 years, mean 40 +/- 6) who underwent transesophageal echocardiography. RAA flow pattern was demonstrated to be bi-, tri- or quadriphasic and heart rate dependent (p < 0.01) in this study. In 15 subjects (36%), a biphasic pattern was observed. A triphasic pattern was observed in 12 subjects (28%). Fifteen subjects (36%) had a quadriphasic pattern. In these subjects, we observed a pattern consisting of two diastolic forward flow waves, each followed by a backward flow wave. Mean heart rates among subjects with bi-, tri- and quadriphasic patterns were 110 +/- 6, 91 +/- 4 and 72 +/- 13 beats/min, respectively. In the triphasic pattern, the onset of superior vena cava diastolic forward flow began 18 +/- 4 ms after the onset of tricuspid E wave, whereas the first diastolic forward flow wave in the RAA began 40 +/- 7 ms after onset of the tricuspid E wave. A similar relation was also noted in the quadriphasic pattern. This sequence was constant and independent of heart rate (p < 0.05), suggesting a temporal relation between right ventricular relaxation and the first diastolic forward flow wave in the RAA.