Heart Rate Variability: Clinical Applications and Interaction between HRV and Heart Rate - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Heart Rate Variability: Clinical Applications and Interaction between HRV and Heart Rate write by Karin Trimmel. This book was released on 2015-10-07. Heart Rate Variability: Clinical Applications and Interaction between HRV and Heart Rate available in PDF, EPUB and Kindle. Over the last decades, assessment of heart rate variability (HRV) has increased in various fields of research. HRV describes changes in heartbeat intervals, which are caused by autonomic neural regulation, i.e. by the interplay of the sympathetic and the parasympathetic nervous systems. The most frequent application of HRV is connected to cardiological issues, most importantly to the monitoring of post-myocardial infarction patients and the prediction of sudden cardiac death. Analysis of HRV is also frequently applied in relation to diabetes, renal failure, neurological and psychiatric conditions, sleep disorders, psychological phenomena such as stress, as well as drug and addiction research including alcohol and smoking. The widespread application of HRV measurements is based on the fact that they are noninvasive, easy to perform, and in general reproducible – if carried out under standardized conditions. However, the amount of parameters to be analysed is still rising. Well-established time domain and frequency domain parameters are discussed controversially when it comes to their physiological interpretation and their psychometric properties like reliability and validity, and the sensitivity to cardiovascular properties of the variety of parameters seems to be a topic for further research. Recently introduced parameters like pNNxx and new dynamic methods such as approximate entropy and detrended fluctuation analysis offer new potentials and warrant standardization. However, HRV is significantly associated with average heart rate (HR) and one can conclude that HRV actually provides information on two quantities, i.e. on HR and its variability. It is hard to determine which of these two plays a principal role in the clinical value of HRV. The association between HRV and HR is not only a physiological phenomenon but also a mathematical one which is due to non-linear (mathematical) relationship between RR interval and HR. If one normalizes HRV to its average RR interval, one may get ‘pure’ variability free from the mathematical bias. Recently, a new modification method of the association between HRV and HR has been developed which enables us to completely remove the HRV dependence on HR (even the physiological one), or conversely enhance this dependence. Such an approach allows us to explore the HR contribution to the clinical significance of HRV, i.e. whether HR or its variability plays a main role in the HRV clinical value. This Research Topic covers recent advances in the application of HRV, methodological issues, basic underlying mechanisms as well as all aspects of the interaction between HRV and HR.
Electrocardiographic Imaging
Electrocardiographic Imaging - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Electrocardiographic Imaging write by Maria S. Guillem. This book was released on 2020-04-17. Electrocardiographic Imaging available in PDF, EPUB and Kindle. Electrical activity in the myocardium coordinates the contraction of the heart, and its knowledge could lead to a better understanding, diagnosis, and treatment of cardiac diseases. This electrical activity generates an electromagnetic field that propagates outside the heart and reaches the human torso surface, where it can be easily measured. Classical electrocardiography aims to interpret the 12-lead electrocardiogram (ECG) to determine cardiac activity and support the diagnosis of cardiac pathologies such as arrhythmias, altered activations, and ischemia. More recently, a higher number of leads is used to reconstruct a more detailed quantitative description of the electrical activity in the heart by solving the so-called inverse problem of electrocardiography. This technique is known as ECG imaging. Today, clinical applications of ECG imaging are showing promising results in guiding a variety of electrophysiological interventions such as catheter ablation of atrial fibrillation and ventricular tachycardia. However, in order to promote the adoption of ECG imaging in the routine clinical practice, further research is required regarding more accurate mathematical methods, further scientific validation under different preclinical scenarios and a more extensive clinical validation
Current and Future Role of Artificial Intelligence in Cardiac Imaging
Current and Future Role of Artificial Intelligence in Cardiac Imaging - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Current and Future Role of Artificial Intelligence in Cardiac Imaging write by Steffen Erhard Petersen. This book was released on 2020-10-09. Current and Future Role of Artificial Intelligence in Cardiac Imaging available in PDF, EPUB and Kindle. This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Coronary Microvascular Dysfunction
Coronary Microvascular Dysfunction - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Coronary Microvascular Dysfunction write by Filippo Crea. This book was released on 2013-08-15. Coronary Microvascular Dysfunction available in PDF, EPUB and Kindle. In the past two decades a number of studies have shown that abnormalities in the function and structure of coronary microcirculation can be detected in several cardiovascular diseases. On the basis of the clinical setting in which it occurs, coronary microvascular dysfunction (CMD) can be classified into four types: CMD in the absence of any other cardiac disease; CMD in myocardial diseases; CMD in obstructive epicardial coronary artery disease; and iatrogenic CMD. In some instances CMD represents an epiphenomenon, whereas in others it represents an important marker of risk or may contribute to the pathogenesis of myocardial ischemia, thus becoming a possible therapeutic target. This book provides an update on coronary physiology and a systematic assessment of microvascular abnormalities in cardiovascular diseases, in the hope that it will assist clinicians in prevention, detection and management of CMD in their everyday activity.
Cardioimmunology: Inflammation and Immunity in Cardiovascular Disease
Cardioimmunology: Inflammation and Immunity in Cardiovascular Disease - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Cardioimmunology: Inflammation and Immunity in Cardiovascular Disease write by Mohamed Boutjdir. This book was released on 2020-01-30. Cardioimmunology: Inflammation and Immunity in Cardiovascular Disease available in PDF, EPUB and Kindle.
