Key result
Combined RV6>RV5 and precordial voltage ECG criteria yield ~100% specificity for diagnosing LVH.
Why the study?
Do specific ECG criteria accurately diagnose left ventricular hypertrophy in patients with essential hypertension and right bundle branch block?
Cross-Sectional (n=37)
Do specific ECG criteria accurately diagnose left ventricular hypertrophy in patients with essential hypertension and right bundle branch block?
A specific combination of ECG criteria (RV6 > RV5 and S III + (R+S) maximum precordial lead >= 30 mm) provides 100% specificity and moderate sensitivity for diagnosing left ventricular hypertrophy in hypertensive patients with right bundle branch block.
May aid noninvasive LVH confirmation in hypertensive RBBB; hypothesis-generating and requires prospective validation.
Right bundle branch block was diagnosed in electrocardiograms of 37 of 1085 patients with essential hypertension. Echocardiographically left ventricular hypertrophy was diagnosed in 14 of these 37 patients. Eighteen electrocardiographic (ECG) criteria, which were previously recommended, were determined in these 37 patients. The sensitivities of five criteria were found to be better than 50%. These are SV1 > or = 2 mm; RV6 > RV5; S III + (R+S) maximum precordial lead > or = 30 mm; P/PR > or = 1.6; R aVL > or = 11 mm. However, their specificities ranged from 56.5% to 95.6%. When the combination of RV6 > RV5 and S III + (R+S) maximum precordial lead > or = 30 mm was used, sensitivity was 57.1 and specificity was 100%. It is concluded that the presence of right bundle branch block these ECG criteria can be used for the diagnosis of left ventricular hypertrophy.
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Nalbantgil et al. (1994) conducted a cross-sectional in Essential hypertension with right bundle branch block (n=37). Electrocardiographic criteria vs. Echocardiography was evaluated on Diagnosis of left ventricular hypertrophy. The combination of ECG criteria RV6 > RV5 and S III + (R+S) maximum precordial lead ≥ 30 mm yielded a sensitivity of 57.1% and specificity of 100% for diagnosing left ventricular hypertrophy.
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