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 31 for “"Ventricular fibrillation"”.
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Ventricular fibrillation and fluctuations in the T-wave
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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The development and analysis of a ventricular fibrillation detector
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1986.
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Exercise and the heart : effects of exercise training on coronary artery disease and on myocardial function, metabolism and vulnerability to ventricular fibrillation
There is epidemiological and experimental evidence suggesting that exercise training may reduce the mortality rate from coronary heart disease, in particular the sudden death rate, and that it may improve the peak functional capacity of the heart. This thesis includes experimental work that is …
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LUCAS - Lund University Cardiopulmonary Assist System
… cardiac arrest using different porcine models of ventricular fibrillation. Four hypotheses were formulated: 1. LUCAS-CPR is superior to manual CPR regarding coronary perfusion pressure (CPP) and return of spontaneous circulation (ROSC). 2. Hypothermic LUCAS-CPR is superior to normothermic …
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Arrhythmogenic potential of alpha-adrenoceptor stimulation in the rat heart
… stimulation on vulnerability to ventricular fibrillation in the norrnoxic rat ventricular myocardium and further to evaluate the possible underlying cellular mechanism. The model used was the isolated perfused rat heart (Langendorff technique) in which ventricular fibrillation was …
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An electrophysiologic investigation of the normal and ischemic left ventricle
… in the electrogenesis of cardiac arrhythmias and ventricular fibrillation in the ischemic heart. Psychological adaptation of the conscious animal to the experimental environment appears to prevent ventricular fibrillation following coronary occlusion. Administration of propranolol in sufficient …
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A study of defibrillator waveforms, vectors, and therapies Kevin Anthony Michael.
The defibrillation studies were performed in a porcine model given its resemblance to the human heart and its resilience to repeated ventricular fibrillation inductions (VF) and defibrillations. A novel sequential preshock waveform was assessed in a prototype serial capacitance device. Single and …
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Study of the Kalman filter for arrhythmia detection with intracardiac electrograms
… devices offer tiered-therapy to reverse ventricular fibrillation (VF) by defibrillation and ventricular tachycardia (VT) by low-energy cardioversion or antitachycardia pacing. The schemes for detecting cardiac arrhythmias often realize nonpathologic tachycardia as serious arrhythmias and …
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The Experiences of Women Who Live with an Implantable Cardioverter-Defibrillator (lCD)
… for terminating potentially life-threatening ventricular fibrillation and ventricular tachycardia. The lCD detects and attempts to correct these arrhythmias by pacing, cardioversion, and defibrillation thereby providing lifesaving therapy to patients at risk for sudden cardiac death. …
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Prehospital Care of Out-of-Hospital Cardiac Arrest Patients
… the initial rhythm at arrival to ER was ventricular fibrillation in 22 (29.3%) cases,defibrillation performed in the ambulance were 4 (18.2%) cases. CONCLUSION: By stander and 119 resuscitation were not satisfactory in the care of the out-of-hospital cardiac arrests.Witnessed arrest and …
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Adenosine and its role in cardioplegia : experimental evaluation in the isolated rat heart and in an-vivo primate model
… even high concentrations of adenosine to limit ventricular fibrillation in the baboon exclude its use as cardioplegic agent on its own without additional interventions. It appears likely that adenosine without high potassium is cardioprotective via activation of A₁ receptors and opening of …
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Echocardiographic Evaluation of Left Ventricular Recovery After Refractory Out-of-Hospital Cardiac Arrest
… design to evaluate patients with refractory ventricular tachycardia/ventricular fibrillation out-of-hospital cardiac arrest who were treated with the Minnesota Resuscitation Consortium protocol. Left ventricular ejection fraction (LVEF), end-diastolic diameter (LVEDD), end-systolic diameter …
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New Paradigm of Defibrillation: Towards Painless Therapy
… year in the United States. It usually starts as ventricular tachycardia: VT) and then degenerates into ventricular fibrillation: VF). Implantable cardioverter defibrillator: ICD) therapy is the only reliable treatment of VT/VF and has been shown to effectively reduce mortality by many clinical …
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The Effects of total and partial inhibition of the sodium and pottassium-activated Adenosine Triphosphatase on the isolated perfused rabbit heart
… investigated in relation to the development of ventricular fibrillation (VF) and contractile failure.Sodium pump inhibition was effected either by reducing the perfusate K concen-^ration (Kq) to 1.1 mmol. 1“’' or zero, or by including luraol.l ’ ouabain in the control medium (K<, = 4.9 mmol. 1 …
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St. Jude Medical: Enhanced MICS (eMICS)
… world. The survival chances for patients with ventricular fibrillation/ventricular tachycardia reduces significantly as time passes without treatment and even after getting timely treatment recurring episode are common. These patients can benefit from an Implantable Cardioverter Defibrillator …
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Atrial arrhythmogenesis in a murine model of mitochondrial insufficiency
Age-related atrial arrhythmias including atrial fibrillation are frequently encountered in clinical practice and are associated with significant mortality and morbidity. A putative role for chronic mitochondrial impairment in their pathogenesis was investigated using a murine model with homozygous …
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Mechanisms of ventricular arrhythmogenesis in the age dependent Pgc-1β -/- model of mitochondrial dysfunction.
… death is a leading cause of mortality worldwide. Ventricular arrhythmias, both ventricular tachycardia and ventricular fibrillation, are the primary arrhythmias that lead to sudden cardiac death. A large proportion of ventricular arrhythmias are ischaemic in origin. However, increasing clinical …
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Contribution of the Purkinje System in Initiation and Maintenance of Arrhythmias
… 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, therefore density and distribution of PMJs …
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A study of the effect of harmonics in the system on the performance of residual current-operated circuit-breakers and electromechanical overcurrent relays
… for the protection of both human beings against ventricular fibrillation and installations against fire. Although they work well with sinusoidal waveforms, there is little published information on their characteristics. Due to shunt connected non-linear devices, not the least of which is the use …
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The Pattern of Ventricular Repolarization during Therapeutic Hypothermia
… (QTc). QTc prolongation can cause polymorphic ventricular tachycardia (VT) and ventricular fibrillation (VF). The interval from the peak to the end of the T wave (TpTe) indicates myocardial transmural dispersion of repolarization (TDR) and increased TDR may create electrophysiological …
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