Browsing by Author "John, Roy M."
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Direct Comparison of Adjacent Endocardial and Epicardial Electrograms: Implications for Substrate Mapping
Tokuda, Michifumi; Tedrow, Usha B.; Inada, Keiichi; Reichlin, Tobias; Michaud, Gregory F.; John, Roy M.; Epstein, Laurence M.; Stevenson, William G. (Blackwell Publishing Ltd, 2013)Background: Analysis of unipolar voltage maps has been used to detect epicardial scar, but data to define optimal parameters to identify scar remote from the recording site is limited. This study compares the characteristics ... -
Effect of Late Gadolinium Enhancement on the Recovery of Left Ventricular Systolic Function After Pulmonary Vein Isolation
Addison, Daniel; Farhad, Hoshang; Shah, Ravi V.; Mayrhofer, Thomas; Abbasi, Siddique A.; John, Roy M.; Michaud, Gregory F.; Jerosch‐Herold, Michael; Hoffmann, Udo; Stevenson, William G.; Kwong, Raymond Y.; Neilan, Tomas G. (John Wiley and Sons Inc., 2016)Background: The factors that predict recovery of left ventricular (LV) systolic dysfunction among patients with atrial fibrillation (AF) are not completely understood. Late gadolinium enhancement (LGE) of the LV has been ... -
The Incidence, Pattern, and Prognostic Value of Left Ventricular Myocardial Scar by Late Gadolinium Enhancement in Patients With Atrial Fibrillation
Neilan, Tomas G; Shah, Ravi Vikram; Abbasi, Siddique Akbar; Farhad, Hoshang; Groarke, John David; Dodson, John; Coelho-Filho, Otavio; McMullan, Ciaran Joseph; Heydari, Bobak; Michaud, Gregory F.; John, Roy Mattathu; van der Geest, Rob; Steigner, Michael L.; Blankstein, Ron; Jerosch-Herold, Michael; Kwong, Raymond Yan-Kit (Elsevier BV, 2013)Objectives We aimed to identify the frequency, pattern, and prognostic significance of left ventricular (LV) late gadolinium enhancement (LGE) in patients with atrial fibrillation (AF). Background There are limited ... -
Left Atrial Passive Emptying Function Determined by Cardiac Magnetic Resonance Predicts Atrial Fibrillation Recurrence After Pulmonary Vein Isolation
Dodson, J; Neilan, Tomas G; Shah, Ravi Vikram; Farhad, H.; Blankstein, Ron; Steigner, Michael L.; Michaud, Gregory F.; John, Roy Mattathu; Abbasi, Siddique Akbar; Jerosch-Herold, Michael; Kwong, Raymond Yan-Kit (Ovid Technologies (Wolters Kluwer Health), 2014)Background While pulmonary vein isolation (PVI) has become a mainstream therapy for selected patients with atrial fibrillation (AF), late recurrent AF is common and its risk factors remain poorly defined. The purpose ...