Key result
Proposed vectorcardiographic criteria for right ventricular hypertrophy in COPD yielded a higher recognition rate than conventional ECG criteria, with good correspondence to autopsy findings.
Why the study?
Do vectorcardiographic criteria improve the recognition of right ventricular hypertrophy compared to conventional ECG in patients with COPD?
Observational
Do vectorcardiographic criteria improve the recognition of right ventricular hypertrophy compared to conventional ECG in patients with COPD?
Proposed quantitative vectorcardiographic criteria improve the recognition rate of right ventricular hypertrophy in COPD patients compared to conventional ECG.
Caution advised before clinical adoption of VCG criteria in COPD; leaves open prospective validation in larger cohorts.
Vectorcardiographic analysis was mainly made on the basis of hemodynamic findings through right heart catheterization in COPD. From the results obtained in the present study, the authors proposed the following quantitative VCG criteria as a mean for clinical recognition of right ventricular overload in patients with COPD. (I) Individual parameters of the criteria are: i) The QRS loop; (a) P/A (posterior force/anterior force) greater than or equal to 2.8 (b) R/L (rightward force/leftward force) greater than or equal to 0.6 (c) P/6 (posterior force/leftward force) greater than or equal to 1.8 ii) The P loop; Ap/Pp (anterior force/posterior force) greater than or equal to 1.8 (II) Criteria i) "RVH (right ventricular hypertrophy)" should satisfy more than 3 of the above individual parameters. ii) "RVH suspected" should satisfy 1 or 2 of them. iii) "RVH negative" should not satisfy any of them. The recognition rate for RVH by the present VCG criteria was higher than the conventional ECG criteria and there was good correspondence with autopsy findings.
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Fujita et al. (1976) conducted an observational in Chronic Obstructive Pulmonary Disease (COPD). Vectorcardiographic (VCG) criteria vs. Conventional ECG criteria was evaluated on Recognition rate for right ventricular hypertrophy (RVH). Proposed vectorcardiographic criteria for right ventricular hypertrophy in COPD yielded a higher recognition rate than conventional ECG criteria, with good correspondence to autopsy findings.
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