Mechanisms of ECG signs in chronic obstructive pulmonary disease.

26 27 We could not confirm previous reports of significantly shorter QRS duration in COPD, 24 28 but found a borderline significant negative correlation between the ratio RV/LV EDV and QRS duration, adjusted for gender and afterload ( table 6 ).

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T able 6 shows that although correlations were highly significant, the R 2 values were rather low, attesting to the complexity of the relationships between the pathophysiological mechanisms.

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