Search Results - "Mazgalev, T"

Functional mathematical model of dual pathway AV nodal conduction by Climent, A M, Guillem, M S, Zhang, Y, Millet, J, Mazgalev, T N

“…Dual atrioventricular (AV) nodal pathway physiology is described as two different wave fronts that propagate from the atria to the His bundle: one with a…”
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High-resolution, three-dimensional fluorescent imaging reveals multilayer conduction pattern in the atrioventricular node by EFIMOV, I. R, MAZGALEV, T. N

“…The atrioventricular node (AVN) is the only normal electrical link between the upper and lower chambers of the heart. The AVN modulates transmission of…”
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Preload-adjusted maximal power: a novel index of left ventricular contractility in atrial fibrillation by Takagaki, M, McCarthy, P M, Chung, M, Connor, J, Dessoffy, R, Ochiai, Y, Howard, M, Doi, K, Kopcak, M, Mazgalev, T N, Fukamachi, K

“…Background: Left ventricular contractility in atrial fibrillation is known to change in a beat to beat fashion, but there is no gold standard for contractility…”
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Surface potentials from the region of the atrioventricular node and their relation to dual pathway electrophysiology by MAZGALEV, T. N, TCHOU, P. J

“…Clinical applications of the principles of dual atrioventricular nodal (AVN) electrophysiology in the treatment of AVN reentrant tachycardias rely on empirical…”
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Anatomic-electrophysiological correlations concerning the pathways for atrioventricular conduction by MAZGALEV, Todor N, HO SIEW YEN, ANDERSON, Robert H

“…The remarkable success of radiofrequency ablation in recent decades in curing atrioventricular nodal reentrant tachycardias has intensified efforts to provide…”
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Selective AV nodal vagal stimulation improves hemodynamics during acute atrial fibrillation in dogs by Wallick, D W, Zhang, Y, Tabata, T, Zhuang, S, Mowrey, K A, Watanabe, J, Greenberg, N L, Grimm, R A, Mazgalev, T N

“…Although the atrioventricular node (AVN) plays a vital role in blocking many of the atrial impulses from reaching the ventricles during atrial fibrillation…”
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Role of the differential bombardment of atrial inputs to the atrioventricular node as a factor influencing ventricular rate during high atrial rate by GARRIGUE, S, TCHOU, P. J, MAZGALEV, T. N

“…The role of the atrial inputs for the conduction through the atrioventricular node (AVN) at slow rates and during reentrant tachycardia is well acknowledged,…”
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Autonomic modification of the atrioventricular node during atrial fibrillation : Role in the slowing of ventricular rate by MAZGALEV, T. N, GARRIGUE, S, MOWREY, K. A, YAMANOUCHI, Y, TCHOU, P. J

“…Postganglionic vagal stimulation (PGVS) by short bursts of subthreshold current evokes release of acetylcholine from myocardial nerve terminals. PGVS applied…”
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Atrioventricular nodal conduction during atrial fibrillation : Role of atrial input modification by GARRIGUE, S, MOWREY, K. A, FAHY, G, TCHOU, P. J, MAZGALEV, T. N

“…Posteroseptal ablation of the atrioventricular node (AVN) has been proposed as a means to slow the ventricular rate during atrial fibrillation (AF). The…”
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His electrogram alternans reveal dual atrioventricular nodal pathway conduction during atrial fibrillation: The role of slow-pathway modification by YOUHUA ZHANG, BHARATI, Saroja, MOWREY, Kent A, MAZGALEV, Todor N

“…Traditional tools to study dual-pathway atrioventricular nodal (AVN) electrophysiology are not applicable in subjects with permanent atrial fibrillation (AF)…”
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The dual AV nodal pathways: are they dual and where are they? by Mazgalev, T N

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Transmembrane Voltage Changes Produced by Real and Virtual Electrodes During Monophasic Defibrillation Shock Delivered by an Implantable Electrode by EFIMOV, IGOR R., CHENG, YUANNA N., BIERMANN, MARTIN, Van WAGONER, DAVID R., MAZGALEV, TODOR N., TCHOU, PATRICK J.

“…Defibrillation Shock‐Induced Virtual Electrodes. Introduction: Epicardial point stimulation produces nonuniform changes in the trans membrane voltage of…”
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His electrogram alternans reveal dual-wavefront inputs into and longitudinal dissociation within the bundle of his by YOUHUA ZHANG, BHARATI, Saroja, MOWREY, Kent A, SHAOWEI ZHUANG, TCHOU, Patrick J, MAZGALEV, Todor N

“…His electrogram (HE) amplitude and morphology changes were observed in our previous studies during transition from "fast" to "slow" atrioventricular nodal…”
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Fully discharging phases : A new approach to biphasic waveforms for external defibrillation by YAMANOUCHI, Y, BREWER, J. E, OLSON, K. F, MOWREY, K. A, MAZGALEV, T. N, WILKOFF, B. L, TCHOU, P. J

“…Phase-2 voltage and maximum pulse width are dependent on phase-1 pulse characteristics in a single-capacitor biphasic waveform. The use of 2 separate output…”
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Assessment of LV systolic function in atrial fibrillation using an index of preceding cardiac cycles by Tabata, T, Grimm, R A, Greenberg, N L, Agler, D A, Mowrey, K A, Wallick, D W, Zhang, Y, Zhuang, S, Mazgalev, T N, Thomas, J D

“…The clinical assessment of left ventricular (LV) systolic function during atrial fibrillation (AF) is unreliable and difficult because of beat-to-beat…”
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Mechanism of atrioventricular nodal facilitation in the rabbit heart: role of the distal AV node by Fahy, G J, Efimov, I, Cheng, Y, Kidwell, G A, Van Wagoner, D, Tchou, P J, Mazgalev, T

“…We investigated whether atrioventricular (AV) nodal facilitation is the result of distal AV nodal action potential shortening. Atrial and bundle of His (H)…”
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High-Resolution Fluorescent Imaging Does Not Reveal a Distinct Atrioventricular Nodal Anterior Input Channel (Fast Pathway) in the Rabbit Heart During Sinus Rhythm by EFIMOV, IGOR R., FAHY, GERARD J., CHENG, YUANNA, VAN WAGONER, DAVID R., TCHOU, PATRICK J., MAZGALEV, TODOR N.

“…Fluorescent Imaging of AVN. Introduction: We sought to determine the precise pathways of engagement of the AV node during sinus rhythm. Methods and Results:…”
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Voltage-sensitive dye RH421 increases contractility of cardiac muscle by Cheng, Y, Van Wagoner, D R, Mazgalev, T N, Tchou, P J, Efimov, I R

“…Voltage-sensitive dyes and imaging techniques have proved to be indispensable tools for use in in vitro electrophysiological studies. To avoid motion artifacts…”
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Effects of 2,3-Butanedione Monoxime on Atrial-Atrioventricular Nodal Conduction in Isolated Rabbit Heart by CHENG, YUANNA, MOWREY, KENT, EFIMOV, IGOR R., Van WAGONER, DAVID R., TCHOU, PATRICK J., MAZGALBV, TODOR N.

“…BDM Effects on AVN Conduction. Introduction: 2,3‐Butanedione monoxime (BDM) has been found to reversibly block cardiac contraction, without blocking electrical…”
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Relation of the atrial input sites to the dual atrioventricular nodal pathways: crossing of conduction curves generated with posterior and anterior pacing by Tchou, P J, Cheng, Y N, Mowrey, K, Efimov, I R, Van Wagoner, D R, Mazgalev, T N

“…The usually accepted definition of the dual pathway electrophysiology requires the presence of conduction curves with a discontinuity ("jump"). However, AV…”
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