Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 152 for “"arrhythmias"”.
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Arrhythmias in Pulmonary Hypertension
Cardiac arrhythmias are common in patients with pulmonary arterial hypertension (PAH) due to structural and electrical remodelling of the right heart, and are associated with adverse clinical outcomes. This study investigated the prevalence and clinical significance of conduction abnormalities and …
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Cardiac Arrhythmias following total Pneumonectomy
<p>[Abstract Not Included]</p> <p>[No Advisor Signatures]</p>
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Controlling Arrhythmias Using Optogenetic Actuators in Computational Simulations
… (GtACR1) to terminate atrial and ventricular arrhythmias in 3D patient-derived models. Additionally, a 2-state photocurrent model for GtACR1 is introduced. Chapter 4 studies the use of subthreshold optogenetic stimulation to up- and down-regulate early afterdepolarization propensity …
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Programmable stimulator system for study of cardiac arrhythmias
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Phosphorylation of TASK-1 and its role in atrial arrhythmias
… phosphorylation at T383 could play a role in arrhythmias, particularly those with an inflammatory component to their etiology. Therefore, an aim of this thesis was to investigate the relationship between inhibitory TASK-1 phosphorylation and peri-operative atrial fibrillation (POAF) in a …
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A Multi-Processor System for the Detection of Electrocardiogram Arrhythmias
… system for the diagnosis of cardiac arrhythmias. The distributed microprocessor approach developed allowed the allocation of a microprocessor to each patient for the purpose of electrocardiogram analysis. The functions performed by these patient-dedicated processors include digital …
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A novel technique for guiding ablative therapy of cardiac arrhythmias
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1999.
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Contribution of the Purkinje System in Initiation and Maintenance of Arrhythmias
The Purkinje system is the conduction network of the heart that facilitates coordinated ventricular contraction and couples to the myocardium at discrete sites called Purkinje-Myocyte Junctions (PMJs). Fine and intricate geometry of the Purkinje system have confined experimental observations, …
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A device user interface for the guided ablative therapy of cardiac arrhythmias
Radio Frequency Ablation (RFA) of cardiac arrhythmias involves the guidance of an ablation catheter to the site of the arrhythmia and the administration of a high-intensity radio-frequency current to the tissue. The current technique used to locate the arrhythmic site suffers from a number of …
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Invasive treatment of atrial arrhythmias, insight in mechanisms and outcome of different techniques
Contains fulltext : 191595.pdf (Publisher’s version ) (Open Access)
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Improved detection and classification of arrhythmias in noise-corrupted electrocardiograms using contextual information
Thesis (Ph. D.)--Harvard University--Massachusetts Institute of Technology Division of Health Sciences and Technology, Program in Medical Engineering and Medical Physics, 1990.
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Computer simulation of a novel technique for Radio-Frequency Ablation of ventricular arrhythmias
Ventricular Tachycardia (VT) is a rapid arrhythmia, most commonly due to reentrant electrical activity in the heart. A common treatment for VT is Radio-Frequency Ablation (RFA), which is minimally invasive, but requires maintenance of VT until the target site for ablation is determined. Most …
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Can the measurement of transventricular intracardiac impedance reliably differentiate haemodynamically stable from unstable arrhythmias?
… unable to assess the haemodynamic stability of arrhythmias and can occasionally deliver intracardiac shocks when patients are conscious. We investigated the use of trans-ventricular impedance (across the left ventricle {LV}) as a haemodynamic sensor during arrhythmias in man.Methodology: …
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Synchronised capacitor discharge in the management of cardiac arrhythmias with particular reference to the haemodynamic significance of atrial systole
In December 1962 a boy of 15 years was referred to the National Heart Hospital because of a ventricular tachycardia, which had proved resistant to treatment with procaine amide, quinidine, atropine, prostigmine, prednisone and digoxin. A second stage, total correction for tetralogy of Pallot had …
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Electrophysiologic Characterization of the Arrhythmogenic Substrate in Reentrant Atrial and Ventricular Arrhythmias Insights from the Clinical and Experimental Electrophysiology Laboratories
… with structural heart disease and ventricular arrhythmias. Such advancements in elucidating the mechanisms and pathophysiology underlying scar-related ventricular tachycardia have yielded improved clinical outcomes for patients with drug-refractory ventricular arrhythmias. Chapter 1 describes …
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Agreement between gadolinium-enhanced cardiac magnetic resonance and electro-anatomical maps in patients with non-ischemic dilated cardiomyopathy and ventricular arrhythmias
… outcome after catheter ablation of ventricular arrhythmias (VA). We identified 50 patients with NIDCM who underwent CMR and ablation for VA. LGE was detected in 16 patients (32%), mostly in those presenting with sustained VT (15 patients). Low-voltage areas (<1.5 mV) were observed in 23 patients …
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