Electrocardiogram (ECG) is generally used for diagnosis of cardiovascular abnormalities and disorders. An efficient method for analysing the ECG signal towards the detection of heart rate (HR) and ischemic episodes follows mainly five stages: pre-processing, feature extraction, heart rate detection, beat classification and ischemic episode recognition. The heart rate is calculated using the ext...

OBJECTIVE To assess heart rate variability (HRV) in athletes with concussion across three phases of recovery. DESIGN A prospective matched control group design included the collection of HRV and symptoms measured by the Rivermead Post-Concussion Questionnaire. These measures were taken at 3 phases of recovery [(1) symptomatic; (2). asymptomatic; and (3) one-week after return-to-play (RTP)]. T...

In the article published in Revista Española de Cardiologı́a, Barge-Caballero et al report on the results of a single-center retrospective observational study to explore the prognostic significance of the mean resting heart rate (HR) at 1 year after heart transplantation and its temporal trend. The authors concluded that elevated resting HR after heart transplantation is a poor prognostic marker...

The aim of this study was to investigate orthostatic reactions in females with Rett syndrome (RTT), and also whether the severity of the syndrome had an impact on autonomic reactions. Based on signs of impaired function of the central autonomic system found in RTT, it could be suspected that orthostatic reactions were affected. The orthostatic reactions in 21 females with RTT and 14 normally de...

The heart rate variation has been observed when analyzing the speech analysis of a person sitting at remote place. In the presented approach, 20 –30 years age group person’s speech is recorded using the common recording utility for testing purposes. The time duration for speech production is approximately 1 2 minutes. Further, the entropy, energy, power, mean, frequency, standard deviation and ...

BACKGROUND Increased heart rate (HR) and decreased heart rate variability (HRV) are evident in some dogs with degenerative mitral valve disease (DMVD). OBJECTIVES Evaluation of the factors influencing HR and HRV (assessed by the vasovagal tonus index; VVTI) and their change over time in dogs with DMVD. ANIMALS Client-owned dogs (n = 257) with DMVD recruited from first opinion practice. ME...

background: it has been reported that the chronic oral administration of garlic homogenate protected the rat heart from in vitro ischemic reperfusion injury. however, the biological effects of garlic juice on the heart are expected to be different from oral administration of it. objective: the present study was designed to investigate the effect of garlic juice on the isolated rat heart in isch...

Studies in animals have shown that drug-induced action potential prolongation with class III antiarrhythmic agents increases with slow pacing rates. We studied the physiological rate dependence of sotalol effects on ventricular repolarization, measured as QT interval duration on the surface electrocardiogram at rest and during a maximal exercise test, in 10 normal volunteers. In a randomized, c...