Search results for "ECG"

Measurements of cardiac Pre-Ejection period using a combo PPG-ECG system

2015

The extraction of biomedical parameters, for early disease detection, is assuming today an ever increasing and fundamental importance. In particular, in the cardiologic field, the preejection period (PEP) is the duration of the iso-volumetric left ventricle contraction until the aortic valve opening. This parameter is a non-constant additive delay, which rapidly changes in response to stress, emotion and physical effort. To estimate this period, several wearable electronics devices have been developed in literature, and among them the Impedance Cardiogram equipment is the most used. However, these systems are often expensive and bulky. In this paper, we propose a cost-effective and easy to …

Predictors of Left Ventricular Hypertrophy in Hypertensive Patients with Normal ECG

2011

Introduction: Early identification of left ventricular hypertrophy (LVH) in hypertensive patients is of great importance for correct stratification of cardiovascular (CV) risk. It is well known that ECGhas low sensibility in detecting LVH, while echocardiography, for organizational difficulties, cannot be performed routinely. Aim: To evaluate the prevalence of LVH and of anomalies of diastolic function in a group of hypertensive patients free of diabetes, CV diseases, and with normal ECG. Methods: We excluded patients with CV diseases, diabetes, chronic kidney disease (CKD), or having ECG-LVH or other ECG anomalies. Then, we enrolled 310 hypertensive patients (mean age 48 years). All enroll…

Piecgadīgu bērnu dabas izzināšanas un veicināšana caur vērojumiem un eksperimentiem

2017

Kvalifikācijas darba temats : “Piecgadīgu bērnu dabas izzināšanas veicināšana caur vērojumiem un eksperimentiem”. Darba autore: Jekaterina Matisāne Pētījuma hipotēze: Piecgadīgu bērnu dabas izzināšanas veicināšana caur vērojumiem un eksperimentiem notiks veiksmīgi tad, ja: -pedagogs motivēs bērnus uz eksperimentālo darbību -tiks veikta praktiska darbošanās Pētījuma mērķis: Piecgadīgu bērnu dabas izzināšanas veicināšana caur vērojumiem un eksperimentiem. Kvalifikācijas darbs sastāv no trīm daļām, kurās ietvertas vairākas apakšnodaļas. Teorētiskajā daļā tiek aplūkoti vairāku pedagogu un pētnieku uzskati un skaidrojumi par dabas izzināšanas veicināšanu. Empīriskās daļas saturs balstās uz prakt…

Electrocardiographic Imaging Using a Spatio-Temporal Basis of Body Surface Potentials—Application to Atrial Ectopic Activity

2018

Electrocardiographic imaging (ECGI) strongly relies on a priori assumptions and additional information to overcome ill-posedness. The major challenge of obtaining good reconstructions consists in finding ways to add information that effectively restricts the solution space without violating properties of the sought solution. In this work, we attempt to address this problem by constructing a spatio-temporal basis of body surface potentials (BSP) from simulations of many focal excitations. Measured BSPs are projected onto this basis and reconstructions are expressed as linear combinations of corresponding transmembrane voltage (TMV) basis vectors. The novel method was applied to simulations o…

Autonomic dysfunction in a group of lower extremities arterial disease outpatients.

2021

Background: The understanding of the specific role of sympathetic neural control and dysregulation in lower extremities arterial disease (LEAD) is still very limited. Aim of our study was to investigate the autonomic profile in LEAD patients and to evaluate if the eventual autonomic alterations were more severe in patients with advanced disease. Methods: We enrolled all consecutive outpatients with LEAD referred to our Departments between July 2012 and September 2014. They were compared to a group of matched outpatients without LEAD. All patients underwent Holter ECG monitoring. Time-domain analysis of heart rate variability (HRV) was evaluated. Results: Compared to controls, patients with …

New insights into symptomatic or silent atrial fibrillation complicating acute myocardial infarction

2015

International audience; Atrial fibrillation (AF) is the most frequent heart rhythm disorder in the general population and contributes not only to a major deterioration in quality of life but also to an increase in cardiovascular morbimortality. The onset of AF in the acute phase of myocardial infarction (MI) is a major event that can jeopardize the prognosis of patients in the short-, medium- and long-term, and is a powerful predictor of a poor prognosis after MI. The suspected mechanism underlying the excess mortality is the drop in coronary flow linked to the acceleration and arrhythmic nature of the left ventricular contractions, which reduce the left ventricular ejection fraction. The p…

Association between silent atrial fibrillation and heart failure after acute myocardial infarction

2013

Silent atrial fibrillation during the acute phase of myocardial infarction

2013

Use of quantitative ECG analysis for early detection and prediction of coronary heart disease

1985

(1985). Use of quantitative ECG analysis for early detection and prediction of coronary heart disease. Medical Informatics: Vol. 10, No. 3, pp. 207-214.

The electrocardiographic ‘triangular QRS-ST-T waveform’ pattern : a marker of severe haemodynamic compromise in Takotsubo syndrome : a case report

2020

Abstract Background Takotsubo cardiomyopathy is characterized by transient regional systolic dysfunction of the left ventricle, mimicking myocardial infarction. Although systolic left ventricular (LV) function normalizes in most cases, the outcome is not always favourable. Recently, a rare electrocardiogram (ECG) finding, lambda wave ST elevation or ‘triangular QRS-ST-T waveform’, was suggested as a possible marker of poor outcome in Takotsubo patients Case summary After a brief episode of chest pain and shortness of breath, a 67-year-old woman developed cardiogenic shock. Her resting ECG showed widespread ST elevations, which soon evolved into a pattern of triangular QRS-ST-T waveforms in …