Comparison between the Valsalva maneuver and a newly-devised expiratory valve on splitting of the second heart sound.

نویسندگان

  • P D Gupta
  • G S Sainani
  • A A Luisada
چکیده

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عنوان ژورنال:
  • Diseases of the chest

دوره 51 6  شماره 

صفحات  -

تاریخ انتشار 1967