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congenital abnormalities文献资料
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The most frequently encountered type of ventricular preexcitation is that1 associated with AV bypass tracts.These connections are composed of2 strands of atrial-like muscle which may occur almost anywhere around the AV ring s.T he term Wolff-Parkinson-White(WPW) syndrome is applied to patients with both preexcitation on the ECG and paroxysmal tachycardias. AV bypass tracts can be associated with certain congenital abnormalities,the most important of which3 is Ebstein's anomaly.
