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    Pacing Clin Electrophysiol. 2010 Jan;33(1):e10-3. Epub 2009 Sep 30.

    Idiopathic premature ventricular contractions exhibiting preferential conduction within the aortic root.

    Yamada T, Yoshida Y, Inden Y, Murohara T, Kay GN.

    Source

    Division of Cardiovascular Disease, University of Alabama at Birmingham, VH B147, 1670 University Boulevard, 1530 3rd Avenue S, Birmingham, AL 35294-0019, USA. takumi-y@fb4.so-net.ne.jp

    Abstract

    A 65-year-old man with frequent premature ventricular contractions (PVCs) underwent electrophysiological testing. Although an excellent pace map was obtained from the right coronary cusp (RCC), radiofrequency ablation at that site interrupted the PVCs transiently. Successful ablation was achieved in the left coronary cusp with earlier local ventricular activation during the PVCs than that in the RCC. These findings suggest that preferential conduction within the aortic root may exist and cause ventricular arrhythmias (VAs) arising from this region to exhibit variable electrocardiographic features, thereby limiting the reliability of electrocardiographic algorithms and pace mapping to predict the site of the VA origin.

    PMID:
    19804490
    [PubMed - indexed for MEDLINE]

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