Tag: heart rate variability

Deceleration capacity (DC) is a novel electrocardiography (ECG) parameter characterizing the overall capacity of slowing down the heart rate. The aim of this study was to evaluate clinical and ECG covariates of DC in patients with the first episode of ST-segment elevation myocardial infarction (STEMI) treated with primary angioplasty...

In chronic obstructive pulmonary disease (COPD) patients, functional and structural changes of the respiratory system greatly influence cardiovascular autonomic functions. Determining autonomic balance may be important in understanding the pathophysiology of COPD and useful clinically in the treatment of COPD patients. Heart rate variability (HRV) and heart rate turbulence (HRT) are useful tools in assessing the autonomic neurovegetative function...

Arterial hypertension is an increasingly important medical and public health issue. Although it is most often considered a disease of old age, it is prone to appear in adolescents in increasing frequencies [1], despite important advances in our understanding of its pathophysiology and the availability of effective treatment strategies...

Obesity has been shown to affect heart rate variability (HRV). Adipokines (hormone-like peptides secreted by adipose tissue) display several bioactivities and have an impact on the cardiovascular system. The aim of the study was to evaluate the impact of obesity (BMI ≥ 30) and adipokines (leptin, adiponectin and resistin) on HRV...

Congestive heart failure (CHF) is an increasingly widespread, costly and deadly disease, frequently named as epidemics of the 21 century. Despite advancement in modern treatment, mortality rate in CHF patients remains high. Therefore, risk stratification in patients with CHF remains one of the major challenges of contemporary cardiology...

Head-up tilt testing (HUT) plays a pivotal role in the management of vasovagal syncope (VVS). Heart rate variability (HRV) is a well-known method used for noninvasive evaluation of autonomic nervous system activity. However, different results have been obtained in studies that have evaluated the HRV response to HUT in patients with VVS...

Reduced heart rate variability (HRV) is associated with a poor outcome in patients with sinus rhythm (SR) or atrial fibrillation (AF). However, cut-off points for HRV measures differ between SR and AF. We hypothesized that a global index of 24-hour HRV based on evaluation of scatterplot would describe HRV irrespective of cardiac rhythm...

The cardiovascular autonomic nervous system in obese children is one of the main initiators of coronary heart disease and hypertension and may have a close relationship with insulin resistance.