The Natural History of Right Bundle Branch CHEST,80: 2, AUGUST,1981 NATURAL HISTORY OF RBBB AND FRONTAL PLANE ORS AXIS 191 Block and Frontal Plane QRS Axis in Apparently Healthy Men*
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چکیده
We examined the characteristics, long-term follow-up, and prognosis of right bundle branch block (RBBB) detected on a routine ECG in men with no apparent heart disease. During the 29-year period, 59 cases of RBBB were observed in men with a mean age of 44.4 ± 1.9 years. Because marked right or left axis deviation may identify cases with concomitant involvement of the left bundle branch system, subsets of frontal plane QRS (A QRS) were examined. Comparisons were made with groups of similar ages who were free of RBBB. Cases with RBBB were observed for 936 person-years (mean
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