TY - JOUR
T1 - Sudden Death in Bundle-Branch Block
AU - Michael, Max
AU - Rosen, Kenneth M.
AU - Denes, Pablo
AU - Dhingra, Ramesh
AU - Wyndham, Christopher
AU - Mcanulty, John H.
AU - Rahimtoola, Shahbudin H.
AU - Murphy, Edward S.
AU - Ritzmann, Leonard W.
AU - Kanarek, Paula
AU - Demots, Henry
PY - 1978/11/30
Y1 - 1978/11/30
N2 - To the Editor: The report by McAnulty et al. of their prospective study of bundle-branch-block in the August 3 issue of the Journal demonstrates an epidemiologic flaw that could modify the study results and its implications. For the 1211 abnormal electrocardiograms meeting the authors' criteria the authors got in touch with 638 patients as part of the study protocol. Only half the population at risk was studied. The demographic characteristics of the patients lost to follow-up observation are not available to determine the potential effect of selection bias. The problems of a large, prospective study are formidable, but size and…
AB - To the Editor: The report by McAnulty et al. of their prospective study of bundle-branch-block in the August 3 issue of the Journal demonstrates an epidemiologic flaw that could modify the study results and its implications. For the 1211 abnormal electrocardiograms meeting the authors' criteria the authors got in touch with 638 patients as part of the study protocol. Only half the population at risk was studied. The demographic characteristics of the patients lost to follow-up observation are not available to determine the potential effect of selection bias. The problems of a large, prospective study are formidable, but size and…
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U2 - 10.1056/NEJM197811302992219
DO - 10.1056/NEJM197811302992219
M3 - Letter
C2 - 714091
AN - SCOPUS:0018280094
SN - 0028-4793
VL - 299
SP - 1256
EP - 1257
JO - New England Journal of Medicine
JF - New England Journal of Medicine
IS - 22
ER -