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 778 for “"Ventricular"”.
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Electrophysiological mechanism of ventricular automaticity : a model foe ventricular arrythmias
Ventricular arrhythmias are difficult to study in man. The current experimental models are arrhythmias induced by electrical stimulation, coronary artery ligation or by subsequent reperfusion. An electrophysiological model will be useful for exploring the cellular mechanism of arrhythmias and for …
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Left Ventricular Long Axis Dynamics in Pathological and Physiological Left Ventricular Hypertrophy
… could determine the nature of increases in left ventricular size (pathological or physiological). <br/><br/>Study one examined differences at rest in longitudinal velocities between individuals with hypertrophic cardiomyopathy (HCM), hypertension (HT), weightlifters, runners and controls, (n = 15 …
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Left ventricular submitral aneurysms
… classification and surgical management of left ventricular submitral aneurysms (LVSMA). These aneurysms are a well recognized but relatively rare disease found commonly in patients from African ancestry. The series comprises 20 consecutive patients treated surgically at three institutions from …
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Studies in right ventricular function: Employing the conductance catheter method for ventricular volume determination
The importance of quantifying right ventricular (RV) function has become clear in recent years. Following adult cardiac surgery right ventricular dysfunction has emerged as a significant cause of morbidity and mortality, particularly after transplantation and during left ventricular (L V) assist …
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Nitrates and Left Ventricular Dysfunction
… therapy in patients with evidence of left ventricular (LV) dysfunction after acute myocardial infarction (AMI) already treated with standard heart failure (HF) therapy. Paper I. In a randomized, double-blind, placebo controlled trial, we evaluated the effects of a 60 mg dose of …
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Cardiovascular magnetic resonance and right ventricular angiography in assessment of right ventricular volumes, function and wall motion abnormalities in arrhythmogenic right ventricular cardiomyopathy: a comparative study
Background: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiomyopathy characterised by structural changes to mostly the right ventricle (RV) that predisposes to ventricular arrhythmias heart failure and sudden cardiac death. ARVC is diagnosed using the 2010 Task Force …
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Metabolic support in left ventricular hypertrophy
Aims: To examine the metabolic changes associated with LVH secondary to AS, to examine the role of GIK as an adjunct to myocardial protection during AVR, and to examine the mechanism of its action. Methods: 220 patients with LVH secondary to AS were randomised 1:1 to receive an infusion of GIK at …
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Hanging-Associated Left Ventricular Systolic Dysfunction
… patients (2 males, 34 ± 13 year-old) showed left ventricular (LV) systolic dysfunction (mean LVEF: 34 ± 16%). Global hypokinesia was presented in one patient. Apical ballooning with sparing of the basal segments was presented in 2 patients. Basal akinesia and apical hyperkinesia was presented in …
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MRI of structured-based ventricular mechanics
… to understanding the functional design of the ventricular myocardium. This thesis develops a completely noninvasive method, registered diffusion and strain MRI, to acquire information about myocardial architecture and myocardial strain under identical in-vivo conditions. This noninvasive …
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Backscatter and Attenuation Characterization of Ventricular Myocardium
… potential differences in the left and right ventricular myocardium. The hearts were interrogated using a 50 MHz transducer that enabled finer spatial resolution than could be achieved at more typical clinical frequencies. Ultrasonic data analyses demonstrated different patterns and relative …
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Biomarkers of ventricular remodelling in African hypertensives.
… burden of hypertension, hypertension with left ventricular hypertrophy and hypertensive heart failure is very enormous in sub-Saharan Africa. There is therefore the need to look for easier and faster means, compared to electrocardiography and echocardiography of diagnosing and differentiating …
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Towards short-term forecasting of ventricular tachyarrhythmias
… temporal behavior correlated with an approaching Ventricular Tachyarrhythmic (VTA) event. A computer experiment is performed where a supervised learning algorithm models the ECG signals with the targeted behavior, applies the models on other signals, and analyzes consistencies in the results. The …
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Stochastic characterization of chronic ventricular ectopic activity
Thesis (Ph.D.)--Harvard-Massachusetts Institute of Technology Division of Health Science and Technology Program in Medical Engineering and Medical Physics, 1986.
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Metabifurcation analysis of a phenomenological ventricular cell model
Heart disease is the leading cause of death in America, and arrhythmia is considered one of the most important precursors of heart attacks. We cannot predict arrhythmia directly; however, it has been shown that cardiac alternans is closely related to arrhythmia[35]. Therefore, predicting alternans …
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Arrhythmogenic Right Ventricular Cardiomyopathy: From Surviving to Thriving
Arrhythmogenic right ventricular cardiomyopathy is a life-threatening, inherited disease, and a leading cause of sudden cardiac death in young, otherwise healthy adolescents and adults. Through the advances of modern technology, those who receive this once-devastating diagnosis, now stand an …
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Left ventricular boundary detection in digitized cardiac images
<p>Edge detecting techniques relative to application in a portion of Eastern Washington University's Heart Modeling System (HMS) are discussed. Filters, sharpeners, and transforms are discussed in more depth. Twelve operators, several with more than one mask, are tested to arrive at the optimal …
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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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Analysis of desmoplakin in arrythmogenic right ventricular cardiomyopathy
… dilated, hypertrophic, restrictive, and right ventricular arrhythmogenic forms, are found in African populations. Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a rare muscle disease characterised by fibrofatty replacement of the right ventricular myocardium, leading to electrical …
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