Douglas L. Packer
Mayo Clinic
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Publication
Featured researches published by Douglas L. Packer.
Journal of Cardiovascular Electrophysiology | 2005
T. Jared Bunch; G. Keith Bruce; Srijoy Mahapatra; B B S Susan Johnson; Dylan V. Miller; Alvaro Sarabanda; Mark A. Milton; Douglas L. Packer
Background: The phrenic nerve can be injured with radiofrequency energy delivery. Nevertheless, the mechanisms of injury are unknown. This study was undertaken to examine phrenic nerve tissue temperatures during ablation at the pulmonary vein (PV) orifice, assess the temperature dependence of injury, and to delineate the possible mechanisms of untoward nerve effects.
Journal of Cardiovascular Electrophysiology | 2008
Yasuo Okumura; B B S Susan Johnson; T. Jared Bunch; Benhur D. Henz; Christine J. O'brien; Douglas L. Packer
Introduction: While catheter tip/tissue contact has been shown to be an important determinant of ablative lesions in in vitro studies, the impact of contact on the outcomes of mapping and ablation in the intact heart has not been evaluated.
Journal of Cardiovascular Electrophysiology | 2010
Anita Wokhlu; David O. Hodge; H R N Kristi Monahan; Samuel J. Asirvatham; Paul A. Friedman; Thomas M. Munger; Yong-Mei Cha; Win-Kuang Shen; Peter A. Brady; M R N Christine Bluhm; M R N Janis Haroldson; Stephen C. Hammill; Douglas L. Packer
Long‐Term Outcome of AF Ablation. Introduction: Ablation eliminates atrial fibrillation (AF) in studies with 1 year follow‐up, but very late recurrences may compromise long‐term efficacy. In a large cohort, we sought to describe the determinants of delayed recurrence after AF ablation.
Journal of Cardiovascular Electrophysiology | 2005
T. Jared Bunch; Samuel J. Asirvatham; Paul A. Friedman; H R N Kristi Monahan; Thomas M. Munger; Robert F. Rea; Lawrence J. Sinak; Douglas L. Packer
Background: Perforation during catheter procedures in either the atrium or ventricle is relatively uncommon, but potentially fatal if tamponade ensues. This study analyzes the occurrence and outcomes of cardiac perforation during catheter‐based radiofrequency ablation procedures in the left atrium.
Journal of Cardiovascular Electrophysiology | 2009
Paul A. Friedman; Samuel J. Asirvatham; Charles Dalegrave; Masayoshi Kinoshita; Andrew J. Danielsen; B B S Susan Johnson; David O. Hodge; Thomas M. Munger; Douglas L. Packer; Charles J. Bruce
Background: Pharmacologic therapies to prevent stroke in atrial fibrillation (AF) have numerous limitations, prompting the development of device‐based therapies. We investigated whether an electrogram‐based approach using a novel hollow suture can safely capture and ligate the left atrial appendage (LAA).
Journal of Cardiovascular Electrophysiology | 2001
David M. Luria; Jan Nemec; Susan P. Etheridge; Steven J. Compton; Richard C. Klein; Sumeet S. Chugh; Thomas M. Munger; Win K. Shen; Douglas L. Packer; Arshad Jahangir; Robert F. Rea; Stephen C. Hammill; Paul A. Friedman
Left Atrial Isthmus. Introduction: We observed a change in the atrial activation sequence during radiofrequency (RF) energy application in patients undergoing left accessory pathway (AP) ablation. This occurred without damage to the AP and in the absence of a second AP or alternative arrhythmia mechanism. We hypothesized that block in a left atrial “isthmus” of tissue between the mitral annulus and a left inferior pulmonary vein was responsible for these findings.
Journal of Cardiovascular Electrophysiology | 2010
Apoor S. Gami; William D. Edwards; Nirusha Lachman; Paul A. Friedman; Deepak Talreja; Thomas M. Munger; Stephen C. Hammill; Douglas L. Packer; Samuel J. Asirvatham
Electrophysiological Anatomy of Typical Atrial Flutter. Background: The electrophysiological anatomy of cavotricuspid isthmus‐dependent atrial flutter (CVTI‐AFL) has not been fully elucidated.
Journal of Cardiovascular Electrophysiology | 2009
Yasuo Okumura; Benhur D. Henz; T. Jared Bunch; Charles Dalegrave; B B S Susan Johnson; Douglas L. Packer
Introduction: Cryothermal, HIFU, and laser catheter‐based balloon technologies have been developed to simplify ablation for AF. Initial enthusiasm for their widespread use has been dampened by phrenic nerve (PN) injury. The interaction between PN and pulmonary vein (PV) geometry contributing to PN injury is unclear.
Journal of Cardiovascular Electrophysiology | 2008
Yasuo Okumura; Mark W. Kolasa; B B S Susan Johnson; T. Jared Bunch; Benhur D. Henz; Christine J. O'brien; Dylan V. Miller; Douglas L. Packer
Introduction: The purpose of this study was to examine tissue temperatures around pulmonary veins (PVs) during high intensity focused ultrasound (HIFU) balloon ablation for atrial fibrillation. The thermodynamics and extent of PV and phrenic nerve (PN) heating during HIFU ablation have not been established.
Journal of Cardiovascular Electrophysiology | 2009
Benhur D. Henz; Paul A. Friedman; Charles J. Bruce; Yasuo Okumura; B B S Susan Johnson; Andrew J. Danielsen; Douglas L. Packer; Samuel J. Asirvatham
Background: Right ventricular apical (RVA) pacing promotes tricuspid regurgitation (TR), electromechanical dyssynchrony, and ventricular dysfunction. We tested a novel intramyocardial bipolar lead to assess whether stimulation of the atrioventricular septum (AVS) produces synchronous ventricular activation without crossing the tricuspid valve (TV).