Search Results - "SWARTZ, F J"

Radiofrequency endocardial catheter ablation of accessory atrioventricular pathway atrial insertion sites by SWARTZ, J. F, TRACY, C. M, FLETCHER, R. D

“…High rates of success using radiofrequency ablation energy have rapidly transformed catheter ablation from an investigational procedure to the…”
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Optimization of biphasic waveforms for human nonthoracotomy defibrillation by SWARTZ, J. F, FLETCHER, R. D, KARASIK, P. E

“…Biphasic waveforms reduce defibrillation threshold (DFT) in a wide variety of models. Although there are several human studies of long-duration, high-tilt…”
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Radiofrequency catheter ablation of ectopic atrial tachycardia using paced activation sequence mapping by Tracy, Cynthia M., Swartz, John F., Fletcher, Ross D., Hoops, Harry G., Solomon, Allen J., Karasik, Pamela E., Mukherjee, Diane

“…Objectives. Although ectopic atrial tachycardia is infrequent, it can be an important clinical challenge. We sought to define an alternative therapeutic…”
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Conditioning Prepulse of Biphasic Defibrillator Waveforms Enhances Refractoriness to Fibrillation Wavefronts by Swartz, John F, Jones, Janice L, Jones, Ronald E, Fletcher, Ross

“…The mechanism of biphasic waveform defibrillation threshold reduction is unknown. We tested the hypothesis that, during refractory period stimulation,…”
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Increasing Fibrillation Duration Enhances Relative Asymmetrical Biphasic Versus Monophasic Defibrillator Waveform Efficacy by Jones, Janice L, Swartz, John F, Jones, Ronald E, Fletcher, Ross

“…Biphasic waveforms reduce defibrillation threshold compared with corresponding monophasic waveforms. However, effects of fibrillation duration on relative…”
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Characterization of ventricular fibrillation based on monophasic action potential morphology in the human heart by SWARTZ, J. F, JONES, J. L, FLETCHER, R. D

“…Recent studies examining mechanisms of defibrillation have focused on prolongation of graded cellular response duration during refractory period stimulation…”
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Effect on coronary artery anatomy of radiofrequency catheter ablation of atrial insertion sites of accessory pathways by Solomon, Allen J., Tracy, Cynthia M., Swartz, John F., Reagan, Kathleen M., Karasik, Pamela E., Fletcher, Ross D.

“…Objectives. The purpose of this study was to analyze the effects of radiofrequency catheter ablation of the atrial insertion site of accessory pathways on the…”
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Excess glucose intake induces accelerated beta-cell polyploidization in normal mice: a possible deleterious effect by White, J W, Swartz, F J, Swartz, A F

“…Normal nondiabetic homozygous and heterozygous littermates of db/db diabetes-prone mice (seven/group) were fed a 5% solution of glucose as their sole source of…”
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Changes in polyploidization of exocrine pancreas in db/db diabetic and normal mice by White, J W, Swartz, F J

“…Polyploidy in tele-insular and peri-insular exocrine pancreas of C57BL/KsJ-db/db diabetic mice and normal littermate controls was quantitated, because the…”
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An islet of Langerhans located within the epithelium of a human pancreatic duct by Swartz, F J, Carstens, P H

“…An unusual structure resembling an islet of Langerhans was described in the pancreatic ductal epithelium of a presumably normal human male. Further studies to…”
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Development of polyploidy in B-cells of normal and diabetic mice by Pohl, M N, Swartz, F J

“…This study was designed to clarify the relationship between pancreatic B-cell polyploidization and the progress of the diabetic syndrome in genetically…”
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Catheter ablation of hemodynamically compromising incessant atrioventricular tachycardia by Tracy, C M, Swartz, J F, Karasik, P, Solomon, A, Fletcher, R D

“…A 27-year-old woman was admitted to the Georgetown University Hospital with refractory hemodynamically compromising incessant atrioventricular tachycardia. A…”
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Pseudopacemaker malfunction secondary to digital ECG artifact by Higgins, J R, Swartz, J F, Fessenden, K K

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Polyploidy in the pancreas of the normal and diabetic mutant mouse by Ehrie, M G, Swartz, F J

“…The DNA content of endocrine and exocrine pancreatic nuclei of normal C57BL/KsJ and diabetic mutant C57BL/Ks-db/db mice was measured by Feulgen…”
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Diploid, tetraploid and octaploid beta cells in the islets of Langerhans of the normal human pancreas by Ehrie, M G, Swartz, F J

“…The nuclear DNA content of normal human endocrine and exocrine pancreatic cells was determined by Feulgen microdensitometry. Exocrine cell nuclei consistently…”
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The ultrastructure of polyploid B-cells in the islets of normal mice by Bowen, R E, Swartz, F J

“…Light and electron microscopic studies of diploid, tetraploid and octaploid B-cells in the islets of normal C57BL/KsJ mice revealed that polyploid cells were…”
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Chemical and cytological aspects of rat liver growth by SWARTZ, F J

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The uterine epithelium of Ascaris lumbricoides as a model system for the study of polyploidy by Floyd, A D, Swartz, F J

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Evidence for a subpopulation of cells with an extended G2 period in normal adult mouse liver by Perry, L D, Swartz, F J

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Use of an Orthogonal Electrode Array to Identify the Successful Ablation Site in Right Ventricular Outflow Tract Tachycardia by FISHER, WESTBY G., BACON, MARTIN E., SWARTZ, JOHN F.

“…A novel approach to localize the origin of a right ventricular outflow tract tachycardia using an ablation catheter having an orthogonally oriented electrode…”
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