Relationship between accurate auscultation of the fourth heart sound and the level of physician experience

Saurabh Gupta, Andrew D. Michaels

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Background: Poor performance by physicians-in-training and interobserver variability between physicians has diminished clinicians' confidence in the value of the fourth heart sound (S4). Hypothesis: We sought to determine if accurate auscultation of an S4 improves with advancing levels of experience. Methods: We performed a prospective study of 100 patients undergoing left heart catheterization. Patients underwent blinded auscultation by 4 physicians (each from1 of 4 different levels of experience), computerized acoustic cardiography, measurement of B-type natriuretic peptide (BNP) levels, echocardiography for measurement of left ventricular ejection fraction (LVEF), and cardiac catheterization for measurement of left ventricular end-diastolic pressure (LVEDP). Results: While cardiology fellows', residents', and interns' auscultatory findings demonstrated no significant agreement with acoustic cardiography, an S4 auscultated by cardiology attendings had moderate diagnostic accuracy with acoustic cardiography (odds ratio [OR]: 2.31; receiver-operating-characteristic [ROC] area: 0.60). The sensitivities of the S4 were low (39%-46%) for identifying patients with abnormal measures of left ventricular filling pressure (BNP and LVEDP, respectively), and the specificities were fair (76%-80%) with acoustic cardiography. The S4 was not associated with abnormal LVEF. None of the ausculatory groups performed as well as acoustic cardiography in separating patients based on objective measures of left ventricular filling pressure. Acoustic cardiography had the lowest (superior) negative likelihood ratios compared to any ausculatory group. Conclusions: The S4 auscultated by cardiology attendings demonstrated superior diagnostic test characteristics compared with internal medicine housestaff and cardiology fellows. Correlations between the S4 and measures of ventricular filling pressure were superior for acoustic cardiography compared to the auscultator groups.

Original languageEnglish (US)
Pages (from-to)69-75
Number of pages7
JournalClinical Cardiology
Volume32
Issue number2
DOIs
StatePublished - Feb 2009
Externally publishedYes

Fingerprint

Heart Sounds
Auscultation
Acoustics
Physicians
Cardiology
Ventricular Pressure
Brain Natriuretic Peptide
Cardiac Catheterization
Stroke Volume
Blood Pressure
Observer Variation
Internal Medicine
Routine Diagnostic Tests
ROC Curve
Echocardiography
Odds Ratio
Prospective Studies

Keywords

  • Auscultation
  • Hemodynamics
  • Phonocardiography
  • Physical diagnosis/cardiovascular

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Relationship between accurate auscultation of the fourth heart sound and the level of physician experience. / Gupta, Saurabh; Michaels, Andrew D.

In: Clinical Cardiology, Vol. 32, No. 2, 02.2009, p. 69-75.

Research output: Contribution to journalArticle

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