title: Computer-aided auscultation to diagnose Renal Artery Stenosis.
abstract: Renal Artery Stenosis (RAS) is the most common cause of secondary hypertension, and early diagnosis is important since correct and timely treatment may cure hypertension and prevent loss of renal function. This study investigates a new approach to diagnosing renal artery stenosis by computer analysis of the phonogram recorded with an electronic stethoscope. Phonograms recorded from five positions over the renal arteries were obtained, three from patients with confirmed RAS and 15 from healthy subjects. Two features describing the power ratios between the systolic and diastolic periods in two different frequency bands were extracted. It was possible to discriminate all three RAS subjects from the healthy subjects in the frequency band 0.4-1.1 kHz. However, the number of subjects is insufficient to draw statistically significant conclusions about the performance of the system.
authors.affiliation: Dept. of Mechanics and Production, Denmark. mclund@gmail.com
authors.forename: Morten Enemark
authors.initials: ME
authors.lastname: Lund
authors.forename: Tom
authors.initials: T
authors.lastname: Buur
authors.forename: Samuel Emil
authors.initials: SE
authors.lastname: Schmidt
authors.forename: Johannes Jan
authors.initials: JJ
authors.lastname: Struijk
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D005260:Female; D006326:Heart Auscultation / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012078:Renal Artery Obstruction / Q000175:diagnosis* / Q000503:physiopathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013018:Sound Spectrography / Q000379:methods*; D055815:Young Adult