September 1, 1975Circulation
P waves during ectopic atrial rhythms in man: a study utilizing atrial pacing with fixed electrodes.
Why the study?
Can P wave polarity, morphology, and P-R interval reliably localize the origin of ectopic atrial rhythms in patients following open-heart surgery?
Population
69 patients following open-heart surgery
Design
Other
Authors
Discussion
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Member takes
Implication
P-wave criteria may not reliably localize post-surgical ectopic atrial rhythms; challenges prior criteria but leaves open need for validation.
Structured PICO
Can P wave polarity, morphology, and P-R interval reliably localize the origin of ectopic atrial rhythms in patients following open-heart surgery?
P
Population
69 patients following open-heart surgery
I
Intervention
Threshold bipolar pacing from one of 12 selected atrial sites with temporary implanted electrodes
O
Outcome
P wave polarity and morphology and the P-R interval during paced ectopic atrial rhythmssurrogate
P wave polarity, morphology, and P-R interval are unreliable indicators for localizing the origin of ectopic atrial rhythms in humans.
Limitations
- Relation of paced rhythms to spontaneously occurring ectopic rhythms is unclear
Cite This Study
MacLean et al. (1975) studied this question.