Search Results - "YAMANASHI, WILLIAM S."

The effects of caffeine on the inducibility of atrial fibrillation by Rashid, Abdul, Hines, Mujahid, Scherlag, Benjamin J., Yamanashi, William S., Lovallo, William

“…There is widespread belief that caffeine consumption is linked to atrial arrhythmias; however, there is a relative lack of systematic evidence to support the…”
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High Incidence of Thrombus Formation Without Impedance Rise During Radiofrequency Ablation Using Electrode Temperature Control by MATSUDAIRA, KAGARI, NAKAGAWA, HIROSHI, WITTKAMPF, FRED H.M., YAMANASHI, WILLIAM S., IMAI, SHINOBU, PITHA, JAN V., LAZZARA, RALPH, JACKMAN, WARREN M.

“…The authors hypothesized that during RF ablation, the electrode to tissue interface temperature may significantly exceed electrode temperature in the presence…”
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Experimental model for paroxysmal atrial fibrillation arising at the pulmonary vein-atrial junctions by Po, Sunny S, Scherlag, Benjamin J, Yamanashi, William S, Edwards, Jeff, Zhou, Jing, Wu, Richard, Geng, Ning, Lazzara, Ralph, Jackman, Warren M

“…The mechanism(s) by which pulmonary veins (PVs) become ectopically active and subsequently initiate and sustain atrial fibrillation (AF) remains poorly…”
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Electrical stimulation to identify neural elements on the heart: their role in atrial fibrillation by Scherlag, Benjamin J, Nakagawa, Hiroshi, Jackman, Warren M, Yamanashi, William S, Patterson, Eugene, Po, Sunny, Lazzara, Ralph

“…Anesthetized dogs were subjected to a right then left thoracotomy. Two modes of electrical stimulation were used to activate ganglionated plexi (GP) on the…”
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Thermal latency in radiofrequency ablation by WITTKAMPF, F. H. M, NAKAGAWA, H, YAMANASHI, W. S, IMAI, S, JACKMAN, W. M

“…Progression of unintentionally induced atrioventricular delay is occasionally observed directly after termination of radiofrequency delivery in the vicinity of…”
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Comparison of atrial fibrillation inducibility by electrical stimulation of either the extrinsic or the intrinsic autonomic nervous systems by Zhang, Yuan, Scherlag, Benjamin J., Lu, Zhibing, Niu, Guo-Dong, Yamanashi, William S., Hogan, Cameron, Fields, Jerad, Ghias, Muhammad, Lazzara, Ralph, Jackman, Warren M., Po, Sunny

“…Objectives To study the effects of bilateral vagosympathetic nerve stimulation (VNS) and ganglionated plexi stimulation (GPS) on atrial refractoriness and…”
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Comparison of in vivo tissue temperature profile and lesion geometry for radiofrequency ablation with a saline-irrigated electrode versus temperature control in a canine thigh muscle preparation by NAKAGAWA, H, YAMANASHI, W. S, PITHA, J. V, ARRUDA, M, XANZHUNG WANG, OHTOMO, K, BECKMAN, K. J, MCCLELLAND, J. H, LAZZARA, R, JACKMAN, W. M

“…It is thought that only a thin layer of tissue adjacent to the electrode is heated directly by electrical current (resistive heating) during radiofrequency…”
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Inverse relationship between electrode size and lesion size during radiofrequency ablation with active electrode cooling by NAKAGAWA, H, WITTKAMPF, F. H. M, YAMANASHI, W. S, PITHA, J. V, IMAI, S, CAMPBELL, B, ARRUDA, M, LAZZARA, R, JACKMAN, W. M

“…Clinical efficacy has driven the use of larger electrodes (7F, length > or =4 mm) for radiofrequency ablation, which reduces electrogram resolution and causes…”
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Endovascular stimulation within the left pulmonary artery to induce slowing of heart rate and paroxysmal atrial fibrillation by Scherlag, Benjamin J, Yamanashi, William S, Schauerte, Patrick, Scherlag, Michael, Sun, Ying-Xian, Hou, Yuemei, Jackman, Warren M, Lazzara, Ralph

“…In recent years there have been many reports dealing with basic models for sustained atrial fibrillation (AF), however few animal models exist for paroxysmal…”
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Experimental model of inappropriate sinus tachycardia: initiation and ablation by Scherlag, Benjamin J, Yamanashi, William S, Amin, Rohit, Lazzara, Ralph, Jackman, Warren M

“…The purpose of the present study was to develop an experimental model of inappropriate sinus tachycardia (IST) by injecting a catecholamine into a fat pad…”
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Magnetism and Cardiac Arrhythmias by Scherlag, Benjamin J, Yamanashi, William S, Hou, Yuemei, Jacobson, Jerry I, Jackman, Warren M, Lazzara, Ralph

“…Low-level electromagnetic fields (EMFs) have been used to treat various neurologic disorders. In the present study, we applied micro Gauss (μG) levels of EMFs…”
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Variability of AV nodal potentials recorded, in vivo: direct demonstration of dual AV nodal physiology by Scherlag, Benjamin J, Yamanashi, William S, Yagi, Tetsuo, Patterson, Eugene, Lazzara, Ralph, Jackman, Warren M

“…We developed a method to record extracellular A-V nodal potentials in the beating dog heart, in vivo. In eleven Na-pentobarbital anesthetized, open-chest dogs,…”
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Endovascular Stimulation of Autonomic Neural Elements in the Superior Vena Cava Using a Flexible Loop Catheter by Hasdemir, Can, Scherlag, Benjamin J, Yamanashi, William S, Lazzara, Ralph, Jackman, Warren M

“…It has been previously shown that parasympathetic nerve stimulation (PNS) can be achieved via basket electrode catheters (BEC) positioned in the superior vena…”
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Why a Large Tip Electrode Makes a Deeper Radiofrequency Lesion by OTOMO, KENICHIRO, YAMANASHI, WILLIAM S., TONDO, CLAUDIO, ANTZ, MATTHIAS, BUSSEY, JONATHAN, PITHA, JAN V., ARRUDA, MAURICIO, NAKAGAWA, HIROSHI, WITTKAMPE, FRED H.M., LAZZARA, RALPH, JACKMAN, WARREN M.

“…Increase in RF Lesion Depth with Larger Electrode. Introduction: Increasing electrode size allows an increase in radiofrequency lesion depth. The purpose of…”
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Why a large tip electrode makes a deeper radiofrequency lesion: effects of increase in electrode cooling and electrode-tissue interface area by Otomo, K, Yamanashi, W S, Tondo, C, Antz, M, Bussey, J, Pitha, J V, Arruda, M, Nakagawa, H, Wittkampf, F H, Lazzara, R, Jackman, W M

“…Increasing electrode size allows an increase in radiofrequency lesion depth. The purpose of this study was to examine the roles of added electrode cooling and…”
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Electromagnetically induced focused heat in the treatment of surgically created aneurysm models by Yamanashi, W S, Patil, A A, Valentine, J L, Hill, D L, LePage, J R, Filip, O F, Lester, P D

“…A hand-held radiofrequency (rf) probe of a novel design based on the principle of the induced current convergence was used to treat aneurysm models using…”
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Endovascular stimulation within the left pulmonary artery to induce slowing of heart rate and paroxysmal atrial fibrillation: Atrial Fibrillation: New insights into mechanisms, new therapeutic approaches by SCHERLAG, Benjamin J, YAMANASHI, William S, SCHAUERTE, Patrick, SCHERLAG, Michael, SUN, Ying-Xian, YUEMEI HOU, JACKMAN, Warren M, LAZZARA, Ralph

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Inverse relationship between electrode size and lesion size during radiofrequency ablation with active elecrode cooling by Nakagawa, Hiroshi, Wittkampf, Fred H M, Yamanashi, William S, Pitha, Jan V

“…BACKGROUND: Clinical efficacy has driven the use of larger electrodes (7F, length or =4 mm) for radiofrequency ablation, which reduces electrogram resolution…”
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Radiofrequency Catheter Ablation with the Split-Tip Electrode in the Temperature-Controlled Mode by ANTZ, MATTHIAS, OTOMO, KENICHIRO, NAKAGAWA, HIROSHI, YAMANASHI, WILLIAM S., JACKMAN, WARREN M., KUCK, KARL-HEINZ

“…ANTZ, M., et al.: Radiofrequency Catheter Ablation with the Split‐Tip Electrode in the Temperature‐Controlled Mode. The 7 Fr “split‐tip electrode” (2.5‐mm tip…”
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An initial physical mechanism in the treatment of neurologic disorders with externally applied pico Tesla magnetic fields by Jacobson, J I, Yamanashi, W S

“…The recent clinical studies describing the treatment of some neurological disorders with an externally applied pico Tesla (10(-12) Tesla, or 10(-8) gauss)…”
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