Diagnosing Left Ventricular Dysfunction in Primary Care
Author Information
Author(s): Madhok V, Falk G, Rogers A, Struthers AD, Sullivan FM, Fahey T
Primary Institution: Tayside Centre for General Practice, University of Dundee
Hypothesis
To assess the accuracy of findings from clinical history, symptoms, signs, and diagnostic tests in diagnosing left ventricular systolic dysfunction (LVSD) in primary care.
Conclusion
Clinical history and examination findings are insufficient to diagnose LVSD, but BNP and ECG tests are useful for ruling out the condition when results are normal.
Supporting Evidence
- 24 studies were included in the analysis.
- The median prevalence of LVSD was 29.9%.
- No clinical history item provided sufficient diagnostic information to rule in or out LVSD.
- Displaced apex beat had a high positive likelihood ratio but was infrequently observed.
- ECG was the most studied diagnostic test with varying negative likelihood ratios.
Takeaway
Doctors can't always tell if someone has heart problems just by asking questions or doing exams, but certain tests can help them be sure.
Methodology
A systematic review and meta-analysis of diagnostic accuracy studies in primary care, including cross-sectional or cohort studies that assessed symptoms, signs, and diagnostic tests against echocardiography.
Potential Biases
Potential bias due to lack of blinding between index tests and reference standards in half of the included studies.
Limitations
The studies included had significant heterogeneity in definitions and diagnostic thresholds, and many clinical signs were infrequently observed.
Participant Demographics
Participants were recruited from community or primary care settings with symptoms suggestive of LVSD.
Statistical Information
Confidence Interval
8.2–30.9 for displaced apex beat
Digital Object Identifier (DOI)
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