Key result
Right ventricle to pulmonary artery shunt was associated with a slightly longer QRS duration immediately post-Norwood compared to Blalock-Taussig shunt (P=0.04), but differences did not persist.
Why the study?
Does the use of a right ventricle to pulmonary artery shunt compared to a modified Blalock-Taussig shunt affect QRS duration and ventricular arrhythmias in patients undergoing the Norwood procedure?
Population
82 consecutive patients undergoing Norwood palliation with subsequent superior cavopulmonary anastomosis
Comparison
Right ventricle to pulmonary artery shunt during… vs Modified Blalock-Taussig shunt during Norwood…
Design
Cohort
Follow-up
Until prior to the superior cavopulmonary anastomosis
Authors
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Transient QRS difference with RV-PA shunt does not persist or affect arrhythmias by SCPC; leaves open longer-term conduction outcomes.
Cohort (n=82)
Does the use of a right ventricle to pulmonary artery shunt compared to a modified Blalock-Taussig shunt affect QRS duration and ventricular arrhythmias in patients undergoing the Norwood procedure?
p-value: p=0.04
The type of shunt used during the Norwood procedure (RV-PA vs BTS) does not significantly impact QRS duration or the incidence of treatable ventricular arrhythmias by the time of superior cavopulmonary anastomosis.
Graham et al. (2007) conducted a cohort in Congenital heart disease requiring Norwood procedure (n=82). Right ventricle to pulmonary artery shunt (RV-PA) vs. Modified Blalock-Taussig shunt (BTS) was evaluated on Absolute QRS duration and change in QRS duration (p=0.04). Right ventricle to pulmonary artery shunt was associated with a slightly longer QRS duration immediately post-Norwood compared to Blalock-Taussig shunt (P=0.04), but differences did not persist.
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