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Ventricular Echo Beats and Retrograde Atrioventricular Nodal Exits in the Dog Heart: Multiplicity in Their Electrophysiologic and Anatomic Characteristics by NOBUO TOSHIDA; KENZO HIRAO; NAOHITO YAMAMOTO; MICHIO TANAKA; FUMIO SUZUKI; MITSUAKI ISOBE is a Medicine article available to read on EtoBox.
What is Ventricular Echo Beats and Retrograde Atrioventricular Nodal Exits in the Dog Heart: Multiplicity in Their Electrophysiologic and Anatomic Characteristics about?
**Ventricular Echo Beats and Retrograde AV Nodal Exits.** __Introduction:__ A single ventricular echo beat frequently is induced in the dog heart by ventricular pacing, but it has not been investigated using a concomitant ablative technique. We studied the effects of ablating the anterior atrial input to the AV node on ventricular echo beats induced in the dog heart to evaluate their electrophysiologic characteristics, the anatomic reentrant circuit, and the retrograde AV nodal exits. __Methods and Results:__ In 20 dogs, an epicardial radiofrequency current was applied to the right anterior septum in an attempt to ablate the anterior input to the AV node. Ventricular programmed stimulation was performed to evaluate the ventricular echo beat and the retrograde AV nodal exit before and after ablation. The AV junction was examined with light microscopy. Seventeen dogs in which the PR interval was prolonged significantly from 108 ± 17 msec to 153 ± 19 msec (P < 0.001) were selected for ventricular echo evaluation; 3 dogs in which persistent second‐ or third‐degree AV block was induced by ablation were excluded. Ventricular echo beats, which were induced in 13 of 17 dogs, were classifie
Who reads Ventricular Echo Beats and Retrograde Atrioventricular Nodal Exits in the Dog Heart: Multiplicity in Their Electrophysiologic and Anatomic Characteristics?
It is typically read by researchers, students, and practitioners in Medicine.
- Author
- NOBUO TOSHIDA; KENZO HIRAO; NAOHITO YAMAMOTO; MICHIO TANAKA; FUMIO SUZUKI; MITSUAKI ISOBE
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Futura Publishing Company, Inc; Blackwell Publishing Inc.; Wiley (ISSN 1540-8167)
- Published
- 2001
- Language
- EN
- Field
- Medicine (Health Sciences)