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 59 for “"Electrocardiography"”.
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Electrocardiography in DICOM
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Alternative Lead Systems for Diagnostic Electrocardiography: Validation and Clinical Applicability
The standard 12-lead electrocardiogram (ECG) remains one of the most important and most frequently used tools for diagnosing cardiac diseases, although several different examination modalities in cardio¬logy have been developed over the years. The standard ECG uses 10 electrodes placed on …
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The Impact of Prolonged Strenuous Exercise on Right Ventricular Structure and Function: Insights from Novel Echocardiography and Electrocardiography
The body of evidence investigating post-exercise changes in left (LV) and right ventricular (RV) structure and function, commonly referred to as exercise induced cardiac fatigue (EICF), demonstrates a reduction in both systolic and diastolic function. RV dilatation and reduced LV filling are also …
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Ventricular Depolarization in Ischemic Heart Disease.Value of Electrocardiography in Assessment of Severity and Extent of Acute Myocardial Ischemia.
Background In patients with symptoms compatible with acute myocardial infarction (MI), early triage by ECG in the pre-hospital phase by ST-segment elevation myocardial infarction (STEMI) criteria is important for direct transport of these patients to a regional center for primary percutaneous …
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The prognostic value of electrocardiography to predict inpatient mortality in patients with acute pulmonary embolism: a retrospective cohort analysis
… study aims to assess the prognostic value of electrocardiography in predicting inpatient mortality in patients with acute pulmonary embolism, as diagnosed with computed tomography pulmonary angiogram. Method: This was a retrospective cohort design study based at Tygerberg Hospital, Cape Town, …
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Maximum oxygen uptake predicted from submaximal tests
… workloads using open circuit spirometry and electrocardiography, respectively. (Abstract shortened with permission of author.).
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Biomarkers of ventricular remodelling in African hypertensives.
… to look for easier and faster means, compared to electrocardiography and echocardiography of diagnosing and differentiating the different effects of long standing hypertension on cardiac remodelling which ultimately lead to systolic and diastolic dysfunctions as this affects the prognosis, …
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Secondary and Tertiary Prevention at Different Stages in the Development of Heart Failure
… It compared the utility of NT-proBNP with electrocardiography for the detection of left ventricular hypertrophy among patients with type 2 diabetes mellitus (T2DM) without cardiovascular disease. A total of 375 participants were recruited between 2006 and 2007. The key finding is that …
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A Validation Study: Fitbit Charge 2 Heart Rate Measurement at Rest and During Cognitive-Emotional Stressors
… Fitbit Charge 2 (FBC2) Heart Rate (HR) and electrocardiography (ECG) under sedentary conditions. In a sample of 32 post-secondary students, agreement was observed during rest, negative affect images, deceptive pattern solving task, and a listening task. ECG HR and FBC2 HR was sampled …
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Optimizing electrocardiogram analysis for efficient heart condition diagnosis
… lead grouping strategy for efficient real-time Electrocardiography signal classification. This method uses a maximum of six leads instead of the traditional 12-lead approach, leading to significant reductions in sampling time (93.67%), data size at the data acquisition device (50%), and signal …
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The Role Of Seniority And Self-Perceived Expertise In Ecg Monitoring
… expertise of nurses with the level of electrocardiography (ECG) knowledge. Pre-test scores and improvement in post-test scores were compared for 1,910 registered nurses based on their seniority and self-perceived expertise using Pearson correlation and Spearman's Rho. The length of …
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The Effect of Heart Rate on Normal and Abnormal QRS Voltage
Scalar electrocardiography, despite its shortcomings, is still the best single clinical tool for the detection of enlargement of cardiac chambers, particularly the left ventricle. The electrocardiographic diagnosis of left ventricular enlargement is primarily based upon increase in the QRS voltage …
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PhysioMiner : a scalable cloud based framework for physiological waveform mining
… PhysioMiner is tested on a large dataset of electrocardiography (ECG) from 6000 patients in the MIMIC database. Signals are cleaned and processed, and features are extracted per period. A total of 1.2 billion heart beats were processed and 26 billion features were extracted resulting in half …
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Chronic Treatment of TMAO Undermines Mouse Cardiac Structure and Function in a Sex-specific Manner
… hearts showed functional deficits based on electrocardiography and echocardiography results. Immunohistochemistry results showed signs of hypertrophic cardiomyopathy in TMAO-treated male hearts while female TMAO-treated hearts showed signs of dilated cardiomyopathy. Neither TMAO group showed …
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Resiliency and Autonomic Control of Cardiac Responses to Stress
… activation along a continuum of threat. Electrocardiography and impedance cardiography were collected before, during, and after these tasks to assess changes in autonomic functioning. Results from multiple regression analyses indicated that high levels of EC predicted increased vagal …
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Sleep under stress: the complex web of fear, hypervigilance and mental health in a low socioeconomic status community in South Africa
… are derived from the spectral power of the electrocardiography signal and include very low, low and high frequency power measures (VLF, LF and HF power, respectively). VLF and HF power reflect sympathetic withdrawal and parasympathetic input, respectively while LF is understood to reflect a …
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Using Pressure Transducers for Noninvasive Heart and Respiratory Monitoring
… detecting such signals include the widely used electrocardiography (ECG) method. Other more manual methods of heart and respiratory rate estimation require a practitioner to constantly observe the patient. These methods are time consuming and detract valuable time from emergency medical care. …
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Opto-Physiological Modelling: On Light Interaction in Skin Tissue
… introducing a method for contactless imaging electrocardiography.
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Investigating Office Workers’ Performance and Physiological Responses in Virtual Reality Work Environments.
… responses such as electroencephalogram (EEG), electrocardiography (ECG), electrodermal Activity (EDA), and subjective ratings. A within-subject, fully randomized experiment (n=20) was conducted, during which participants performed four sets of cognitive tasks designed to assess perception, …
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