title: Noninvasive prediction of left ventricular systolic dysfunction in patients with clinically suspected heart failure using acoustic cardiography.
abstract: The signs and symptoms of systolic heart failure are frequently insensitive and nonspecific, making an accurate bedside diagnosis of left ventricular systolic dysfunction (LVSD) challenging. B-type natriuretic peptide (BNP) is often used, but is not diagnostically useful when in the indeterminate range. The authors investigated the diagnostic test characteristics of acoustic cardiographic parameters to identify patients with LVSD. Four hundred thirty-three patients with contemporaneous measurements of computerized acoustic cardiography, BNP, and echocardiography were included. The acoustic cardiographic model outperformed BNP alone at detecting reduced left ventricular ejection fraction (C statistic, 0.88 vs 0.67; P<.0001). The acoustic model with BNP did not perform better than the acoustic model alone (P=.14). Within the indeterminate BNP range, the acoustic model outperformed BNP (C statistic, 0.89 vs 0.64; P<.0001). Noninvasive computerized acoustic cardiography predicted LVSD in a diverse population. This acoustic cardiographic model outperformed BNP alone for predicting LVSD.
authors.affiliation: Division of Cardiology, University of Utah, Salt Lake City, UT 84132-2401, USA.
authors.forename: Douglas L
authors.initials: DL
authors.lastname: Kosmicki
authors.forename: Sean P
authors.initials: SP
authors.lastname: Collins
authors.forename: Michael C
authors.initials: MC
authors.lastname: Kontos
authors.forename: Michel
authors.initials: M
authors.lastname: Zuber
authors.forename: Peter
authors.initials: P
authors.lastname: Kipfer
authors.forename: Christine
authors.initials: C
authors.lastname: Attenhofer Jost
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Michaels
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D054143:Heart Failure, Systolic / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000473:pathology; D006352:Heart Ventricles / Q000000981:diagnostic imaging* / Q000473:pathology; D006439:Hemodynamics; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D020097:Natriuretic Peptide, Brain; D010701:Phonocardiography / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D011379:Prognosis; D012372:ROC Curve; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D013318:Stroke Volume; D014463:Ultrasonography; D014481:United States / Q000453:epidemiology; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000473:pathology; D016277:Ventricular Function, Left; D055815:Young Adult
chemical_list: D020097:Natriuretic Peptide, Brain