Radiographic Diagnosis of Aortic-Ball Variance

John C. Hylen, Melvin P. Judkins, Rodney H. Herr, Albert Starr

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Assessing changes in the silicone-rubber ball of the Model 1000 series Starr-Edwards aortic-valve prosthesis is an increasingly frequent diagnostic problem. Bariumimpregnated, silicone-rubber balls have been available since 1962. Presently, these constitute slightly less than 10% of all silicon-rubber balls distributed. Radiographic evidence of aortic-ball variance was obtained for a patient having normal sounds of the prosthetic aortic valve as determined by auscultation, phonocardiography, and sound spectrography. All silicone-rubber balls now produced by the manufacturer are barium-impregnated; henceforth, radiographic techniques will be more uniformly applicable to the early diagnosis of aortic-ball variance. Since most patients with aortic-ball variance are asymptomatic, routine screening for the early detection of ball variance is suggested for all patients with barium-impregnated, silicone-rubber balls. Serial high-resolution films and cineradiography should be used.

Original languageEnglish (US)
Pages (from-to)1120-1122
Number of pages3
JournalJAMA: The Journal of the American Medical Association
Issue number6
StatePublished - Feb 10 1969

ASJC Scopus subject areas

  • General Medicine


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