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Estimation of pulmonary arterial pressure by measuring the size of the right pulmonary artery in the suprasternal echocardiogram

Abschätzung des Pulmonalarteriendrucks durch Messung der Pulmonalarterienweite mit der suprasternalen M-mode Echokardiographie

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Summary

We studied 175 patients within 24 h before cardiac catheterization with suprasternal echocardiography to evaluate whether pulmonary arterial hypertension can be derived by measuring the size of the right pulmonary artery. Group I consisted of 103 patients without pulmonary arterial hypertension (enddiastolic≤12 mm Hg; mean pressure ≤20 mm Hg) and group II consisted of 72 patients with pulmonary arterial hypertension. The right pulmonary artery could be imaged in 91.2% of the patients studied. The size of the right pulmonary artery at the end of diastole in group I measured 17.9±0.2 mm (mean±SEM) and correlated best to the body surface area in this group (r=0.63;p<0.001). The respective index size amounted to 9.9±0.1 mm/m2, and was different from that in group II with 14.1±0.4 mm/m2 (p<0.001). The systolic percent expansion of the right pulmonary artery in group I was 21.2±0.8% and in group II 9.2±0.8% (p<0.001). The index size of the right pulmonary artery for both groups correlated best to the pulmonary enddiastolic pressure (r=0.82;p<0.001). The systolic per cent expansion showed a negative log linear relationship to the pulmonary enddiastolic pressure (r=0.67;p<0.001). Thus, pulmonary arterial pressure can be derived by measuring the size of right pulmonary artery with suprasternal echocardiography.

Zusammenfassung

175 Patienten wurden innerhalb von 24 h vor der Herzkatheteruntersuchung mit Hilfe der suprasternalen M-mode Echokardiographie untersucht. Es wurde geprüft, ob sich eine pulmonale Hypertonie durch Messung der Weite der rechten Pulmonalarterie im suprasternalen Strahlengang abschätzen läßt. Gruppe I bestand aus 103 Patienten ohne pulmonale Hypertonic (enddiastclich ≤12 mm Hg; Mitteldruck≤20 mm Hg). Gruppe II umfaßte 72 Patienten mit einer pulmonalen Hypertonie. Die rechte Pulmonalarterie konnte bei 91,2% der Patienten dargestellt werden. Der enddiastolische Durchmesser der rechten Pulmonalarterie in Gruppe I betrug 17.9±0.2 mm (MW±mittlerer Fehler des Mittelwertes) und korrelierte zur Körperoberfläche der Patienten (r=0.63;p<0.001). Die Indexweite der rechten Pulmonalarterie in Gruppe I betrug 9.9±0.1 mm/m2 und unterschied sich von der in Gruppe II mit 14.1±0.4 mm/m2 (p<0.001). Die prozentuale systolische Erweiterung der rechten Pulmonalarterie in Gruppe I betrug 21.2±0.8%, in Grupper II 9.2±0.8% (p<0.001). Die Indexweite der rechten Pulmonalarterie korrelierte zum enddiastolischen Pulmonalarteriendruck (r=0.82;p<0.001). Die prozentuale systolische Erweiterung zeigte eine negative log-lineare Beziehung zum diastolischen Pulmonalarteriendruck (r=0.67;p<0.001). Eine pulmonale Druckerhöhung kann über die veränderte Weite der rechten Pulmonalarterie und dem Bewegungsmuster des Gefäßes im suprasternalen Strahlengang diagnostiziert werden.

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Correspondence to Dr. W. Kasper.

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Kasper, W., Meinertz, T. Estimation of pulmonary arterial pressure by measuring the size of the right pulmonary artery in the suprasternal echocardiogram. Klin Wochenschr 60, 71–75 (1982). https://doi.org/10.1007/BF01716384

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Key words

  • Pulmonary arterial pressure
  • Right pulmonary artery
  • Suprasternal echocardiography

Schlüsselwörter

  • Pulmonalarteriendruck
  • rechte Pulmonalarterie
  • suprasternale Echokardiographie