Why the study?
Does the site of block on His-bundle electrogram correlate with symptoms like syncope and heart failure in adults with chronic heart block?
Population
49 adults with chronic heart block
Design
Cross-sectional
Authors
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Block distal to His was associated with more syncope in chronic heart block; leaves open whether His-bundle recording improves risk stratification beyond ECG.
Does the site of block on His-bundle electrogram correlate with symptoms like syncope and heart failure in adults with chronic heart block?
In adults with chronic heart block, syncope is significantly more common when the block is distal to the His bundle, and surface ECG features like QRS duration cannot reliably predict the block site.
Kenneth M. Rosen (1973) studied this question.
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