Related Experiment Videos
Twelve-lead electrocardiography in tuberculous pericarditis
J P Smedema1, I Katjitae, H Reuter
1Department of Internal Medicine, Cardiology Unit, Tygerberg Hospital, Western Cape, South Africa.
Summary
Electrocardiograms (ECGs) show changes in tuberculosis pericarditis but do not reliably diagnose cardiac tamponade. Microvoltage on ECG suggests large effusions, aiding in assessing pericardial effusion severity.
Area of Science:
- Cardiology
- Infectious Diseases
- Medical Diagnostics
Background:
- Tuberculosis pericarditis is a significant cause of pericardial effusion.
- Adjuvant corticosteroids are being investigated for their therapeutic efficacy in TB pericarditis management.
- Cardiac tamponade is a critical complication requiring timely diagnosis.
Purpose of the Study:
- To describe 12-lead electrocardiogram (ECG) findings in patients with TB pericarditis.
- To evaluate the diagnostic accuracy of ECG parameters for cardiac tamponade in TB pericarditis.
- To correlate ECG findings with the presence and severity of pericardial effusion.
Main Methods:
- Retrospective descriptive study of 157 patients with echocardiographically confirmed large pericardial effusions.
- Clinical assessment, pericardiocentesis, and fluid analysis were performed.
- ECG parameters including rate, rhythm, microvoltage, electrical alternans, and segment abnormalities were analyzed.
Main Results:
- 88 patients diagnosed with TB pericarditis all had abnormal ECGs; 83% showed chronic pericarditis changes.
- Microvoltage on ECG correlated with large pericardial effusions (>750 ml).
- No specific ECG parameters accurately diagnosed cardiac tamponade.
Conclusions:
- Twelve-lead ECG provides supportive, not diagnostic, information for cardiac tamponade in TB pericarditis.
- Microvoltage on ECG is indicative of large pericardial effusions.
- Absence of microvoltage suggests cardiac tamponade is unlikely.