Search results for "electrocardiogram"
showing 10 items of 21 documents
Update I. A systematic review on the efficacy and safety of chloroquine/hydroxychloroquine for COVID-19
2020
Purpose To assess efficacy and safety of chloroquine (CQ)/hydroxychloroquine (HCQ) for treatment or prophylaxis of COVID-19 in adult humans. Materials and methods MEDLINE, PubMed, EMBASE and two pre-print repositories (bioRxiv, medRxiv) were searched from inception to 8th June 2020 for RCTs and nonrandomized studies (retrospective and prospective, including single-arm, studies) addressing the use of CQ/HCQ in any dose or combination for COVID-19. Results Thirty-two studies were included (6 RCTs, 26 nonrandomized, 29,192 participants). Two RCTs had high risk, two ‘some concerns’ and two low risk of bias (Rob2). Among nonrandomized studies with comparators, nine had high risk and five moderat…
Korelācija starp ehokardiogrammu un EKG atradni slimniekiem ar kreisā kambara hipertorfiju
2018
KOPSAVILKUMS Pamatojums Kreisā kambara hipertrofijai tiek pievērsta uzmanība globālā līmenī. Kreisā kambara hipertrofijas esamība un tās pakāpes novērtēšana ir neatņemama sastāvdaļa ikdienā veiktiem mērījumiem kardioloģijā. Gan ehokardiogrāfija (EhoKG), gan elektrokardiogrāfija (EKG) ir labi zināmas metodes kreisā kamabara hipertrofijas un ar to saistītā riska novērtēšanai. Kreisā kambara hipertrofija tiek uzskatīta par neatkarīgu kardiovaskulārās mirstības un saslimstības riska faktoru. Mērķis Noteikt kreisā kambara hipertrofijas pazīmes, izmantojot elektrokardiogrāfijas un ehokardiogrāfijas metodes, un noskaidrot korelāciju starp kreisā kambara hipertrofijas pazīmēm EKG un EhoKG, kā arī n…
LEFT VENTRICULAR HYPERTROPHY IN HYPERTENSIVE PATIENTS WITH NORMAL ELECTROCARDIOGRAM
2011
Objective: In hypertensive patients the presence of left ventricular hypertrophy (LVH) is associated with increased cardiovascular (CV) morbidity and mortality. Unfortunately electrocardiogram (ECG) has a low sensitivity in detecting LVH, while echocardiography cannot be routinely and extensively performed in all hypertensive patients. In this study we evaluated the prevalence of LVH and of anomalies of diastolic function in a group of hypertensive patients with normal ECG, and free of diabetes and CV diseases. Design and Methods: Patients with CV diseases, diabetes, chronic kidney disease (CKD), electrocardiographic LVH (Sokolow-Lyons or Cornell criterion) or “strain” were excluded. We enr…
Left bundle branch block and myocardial infarction, a diagnosis not always easy: Our experience and review of literature
2012
The occurrence of left bundle branch block (LBBB) is quite common in clinical practice. The changes in cardiac repolarization, caused by this disorder of electric conduction, may mask the presence of an acute myocardial infarction (AMI), delaying the diagnostic-therapeutic iter, with an important impact on prognosis. We describe the case of a woman of 59 years with LBBB, came to our observation for a constrictive chest pain associated with dyspnea. The diagnostic workup for suspected acute coronary syndrome (ACS), initially conducted only on the analysis of the electrocardiogram (negative TnI at entry), showed the presence of coronary arteries free of stenosis. However, the diagnostic confi…
Global electrical heterogeneity as a predictor of cardiovascular mortality in men and women
2018
Aims The aim of this study was to investigate the contribution of depolarization and repolarization abnormalities, specially abnormalities in global electrical heterogeneity of heart in cardiovascular disease (CVD) and all-cause mortality. Methods and results Eight hundred and forty men and 911 women, average age of 63 years participated in this study with average follow-up was 14 years. Six electrocardiogram/vector electrocardiogram (ECG/VECG) markers QRS-duration, QTc-interval, QRST-angle, sum of absolute QRST integral (SAI QRST), T-wave roundness, and TV1-amplitude were estimated from VECG measurements. Hazard ratios (HRs) for CVD events (164 deaths) and all-cause mortality (383 deaths) …
Automatic detection of paroxysmal atrial fibrillation in patients with ischaemic stroke: better than routine diagnostic workup?
2016
Background and purpose Prolonged electrocardiogram (ECG) monitoring after ischaemic stroke increases the diagnostic yield of paroxysmal atrial fibrillation (pAF). In order to facilitate the additional workload involved in ECG analysis due to prolonged monitoring times, we investigated the effectiveness of pAF detection with an automated software algorithm (SA) in comparison to the routine staff-based analysis (RA) during standard stroke-unit care. Therefore, patients with acute ischaemic stroke or transitory ischaemic attack presenting with sinus rhythmus on the admission ECG and no history of atrial fibrillation were prospectively included. Methods A 24-h Holter ECG assessment was performe…
Association between Tpeak-Tend/QT and major adverse cardiovascular events in patients with Takotsubo syndrome
2020
Background:Conflicting results have been described in the scientific literature regarding the relationship between electrocardiographic parameters and complications in patients with Takotsubo syndrome (TTS). Aim of the present study was to investigate whether there is an association between markers of ventricular repolarization and major adverse cardiovascular events (MACE) during hospitalisation. Methods:A retrospective chart review was conducted on a sample of patients with diagnosis of TTS, based on the fulfilment of the revised Mayo Clinic criteria. MACE included acute heart failure, cardiogenic shock, sustained ventricular tachycardia, ventricular fibrillation, and death. The following…
Assessment Of Driving Stress Through SVM And KNN Classifiers On Multi-Domain Physiological Data
2022
We propose an objective stress assessment method based on the extraction of features from physiological time series and their classification using Support Vector Machine and K-Nearest Neighbors algorithms. For this purpose, we used an open dataset consisting of multiparametric physiological signals (electrocardiogram, electromyogram, galvanic skin response and breath signal) obtained during the execution of a driving route within the city of Boston with restful, highway and city driving periods indicative of three different stress states. To predict the driver stress level, 21 features were extracted from 122 chunks of raw signals and were subsequently managed by classification algorithms. …
A portable system for multiple parameters monitoring: towards assessment of health conditions and stress level in the automotive field
2019
In this work, an electronic portable combo system able to synchronously acquire multiple signals, e.g. electrocardiographic (ECG), photoplethysmographic (PPG) and breathing waveforms, is presented. The realized system is also capable of showing in real time some physiological parameters which can be used for assessing health/stress status of the volunteer, such as heart rate and breathing frequency and their trends over time. Thanks to the use of non-invasive PPG probes, of batteries as power supply, and to the possibility to add in the future additional sensors to acquire other signals, the system could also be employed inside vehicles for assessing the status of the driver. Finally, the r…
Automated detection and localization system of myocardial infarction in single-beat ECG using Dual-Q TQWT and wavelet packet tensor decomposition
2020
Background and objective. It is challenging to conduct real-time identification of myocardial infarction (MI) due to artifact corruption and high dimensionality of multi-lead electrocardiogram (ECG). In the present study, we proposed an automated single-beat MI detection and localization system using dual-Q tunable Q-factor wavelet transformation (Dual-Q TQWT) denoising algorithm. Methods. After denoising and segmentation of ECG, a fourth-order wavelet tensor (leads × subbands × samples × beats) was constructed based on thediscretewavelet packet transform (DWPT), to represent the features considering the information of inter-beat, intra-beat, inter-frequency, and inter-lead. To reduce the t…