Cardiac conduction abnormalities in endocarditis defined by the Duke criteria
T J Meine1, R E Nettles, D J Anderson
1Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
American Heart Journal
|August 2, 2001
Summary
Electrocardiogram (ECG) conduction changes are common in endocarditis, affecting 26% of patients. These changes indicate invasive infection and are linked to higher mortality rates.
Area of Science:
- Cardiology
- Infectious Diseases
- Medical Diagnostics
Background:
- Cardiac conduction abnormalities are known complications of endocarditis, associated with increased mortality.
- No prior prospective studies have investigated electrocardiogram (ECG) conduction changes in endocarditis patients.
Purpose of the Study:
- To determine the incidence of ECG conduction changes in a prospective cohort with suspected endocarditis.
- To correlate these ECG changes with echocardiographic findings of invasive infection and patient mortality.
Main Methods:
- 137 patients with definite or possible endocarditis (Duke criteria) and interpretable ECGs were analyzed.
- ECG conduction changes were categorized as new or indeterminate. Echocardiograms assessed for infected valves and invasive infection.
Main Results:
- ECG conduction changes were observed in 26% of patients, more frequent in males and those with prosthetic valves.
- Invasive infections showed ECG conduction changes in 53% of cases, versus 26% for isolated valve infections (P=.046).
- Mortality was higher in patients with ECG conduction changes (31%) compared to those without (15%) (P=.039).
Conclusions:
- ECG conduction changes are a frequent finding in endocarditis.
- These changes are associated with invasive infection and increased in-hospital mortality.
- ECG monitoring remains crucial for assessing endocarditis severity and prognosis.
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