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September 1, 1974Annals of Internal Medicine

Syncope in Patients with Chronic Bifascicular Block

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Population

186 patients with chronic bifascicular block

Design

Cohort

Authors

DRDhingra RcUniversity of Illinois ChicagoPDP DenesNorthwestern UniversityDWDexi WuSun Yat-sen University

Discussion

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Implication

May avoid unnecessary pacing without documented bradyarrhythmia; leaves open need for prospective trials to guide management.

Structured PICO

P
Population
186 patients with chronic bifascicular block (124 with right bundle-branch block and left anterior hemiblock, 24 with right bundle-branch block and left posterior hemiblock, and 38 with left bundle-branch block)
O
Outcome
Causes of syncope, recurrence of syncope, and incidence of late sudden deathhard clinical

Syncope in patients with chronic bifascicular block has diverse causes, rarely recurs, and does not increase the risk of late sudden death, suggesting permanent pacing is only indicated for documented serious bradyarrhythmia.

Cite This Study

Rc et al. (1974) studied this question.

synapsesocial.com/papers/6a1c07e04ebd09f3dfa95bb6https://doi.org/10.7326/0003-4819-81-3-302
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Relationship of Right Bundle-Branch Block and Marked Left Axis Deviation (with Left Parietal or Peri-infarction Block) to Complete Heart Block and Syncope1968 · 181 citations
  2. 2Right Bundle-Branch Block Associated with Left Superior or Inferior Intraventricular Block1970 · 135 citations
  3. 3Atrioventricular conduction defects in patients presenting with syncope and normal PR interval.1972 · 22 citations
  4. 4His Bundle Recordings in Patients with Bundle Branch Block and Transient Neurologic Symptoms1973 · 64 citations
  5. 5Association of right bundle-branch block with left superior or inferior intraventricular block. Its relation to complete heart block and Adams-Stokes syndrome.1969 · 105 citations