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  • respiratory sinus arrh
  • Effects of relaxation and diaphragmatic breathing on respiratory sinus arrhythmia: Implications for cardiovascular disease. (openrepository.com)
  • Respiratory sinus arrhythmia (RSA) has been shown to be a sensitive noninvasive index of parasympathetic cardiac control with empirical evidence supporting its utility in the study of numerous cardiac problems including: cardiac arrhythmias, sudden cardiac death and as a prognostic indicator of recovery after myocardial infarction. (openrepository.com)
  • The current study evaluated the respiratory sinus arrhythmia in college students (N = 160) under the four experimental conditions (baseline, diaphragmatic breathing, modified autogenic training technique, and concentration task). (openrepository.com)
  • Respiratory Sinus Arrhythmia, the variation in the heart rate synchronized with the breathing cycle, forms an interconnection between cardiac-related and respiratory-related signals. (cvut.cz)
  • quantitative
  • To perform quantitative analysis and patient specific modeling, however, simultaneous information about ventilation as well as cardiac activity needs to be recorded and analyzed. (cvut.cz)
  • This paper presents the automated selection of a cardiac-related signal from EIT data and quantitative analysis of this signal. (cvut.cz)
  • heart
  • Respiratory modulation of vagal tone causes a reduction in heart period during inspiration and an increase in cardiac parasympathetic functioning during expiration. (openrepository.com)
  • clinical
  • This chapter will review sex differences in different cardiac arrhythmias with an emphasis on clinical evaluation, treatment, and outcomes. (springer.com)
  • The book then devotes specific chapters to various arrhythmias, including technical innovations in treatment and insights from clinical trials of and current guidelines for permanent pacemakers and implantable cardioverter-defibrillators. (springer.com)
  • From a clinical perspective, according to the "biological model" of sudden cardiac death, both the substrate and the trigger for arrhythmias should be considered to determine whether long-term space flight could lead to an increased risk of sudden death. (wikipedia.org)
  • conduction
  • Combined, these physiologic adaptations suggest that changes in cardiac structure and neurohumoral environment during space flight could alter electrical conduction, although the evidence supporting this contention consists mostly of minor changes in QT interval in a small number of astronauts after long-duration space flight. (wikipedia.org)
  • The causes of cardiac arrhythmias are numerous, from structural changes in the conduction system (the sinoatrial and atrioventricular nodes, or His-Purkinje system) and cardiac muscle, to mutations in genes coding for ion channels of the heart. (wikipedia.org)
  • The prolongation of the action potential duration and refractory period, combined with the maintenance of normal conduction velocity, prevent re-entrant arrhythmias. (wikipedia.org)
  • They decrease conduction through the AV node, and shorten phase two (the plateau) of the cardiac action potential. (wikipedia.org)
  • Cranefield, PF: The Conduction of the Cardiac Impulse. (wikipedia.org)
  • coronary
  • A detailed analysis of the phenomenon of delayed anti-anginal action revealed that PgI2-pretreatment protected against consequences of ischaemia, such as early morphological changes, early and late postocclusion and reperfusion arrhythmias due to coronary artery occlusion or ouabain intoxication. (wikipedia.org)
  • reentrant
  • One useful classification that will be utilized here is reentrant versus non-reentrant arrhythmias. (scholarpedia.org)
  • Thus, there is a strong spatial component to reentrant arrhythmias: either a sufficiently large spatial extent is needed to support the initiation and continuation of the arrhythmia, or an appropriate geometry must be present to allow a reentrant circuit. (scholarpedia.org)
  • acute
  • Phenytoin was given intravenously in 37 patients with cardiac arrhythmias-21 had acute myocardial infarction and 16 had other conditions. (bmj.com)
  • The research, which is published today (Wednesday) in the European Heart Journal , is the first study to investigate the link between acute alcohol consumption and cardiac arrhythmias in a large number of people in a prospective fashion i.e. examining them as they were drinking, rather than asking them to remember at some point afterwards how much they had drunk, when, and for how long. (eurekalert.org)
  • Heavy drinking over a short period of time (acute alcohol consumption) has been linked to "Holiday heart syndrome" in which people without any previous history of heart problems develop arrhythmias and sometimes atrial fibrillation, but the evidence for this has tended to come from small, retrospective studies. (eurekalert.org)
  • Search for methods to prevent sudden cardiac death due to acute myocardial infarction. (wikipedia.org)
  • changes in cardiac
  • Due to changes in amino acids and binding domains, mutations may also affect the ability of these channels to respond to physiological changes in cardiac demand. (wikipedia.org)
  • pathophysiology
  • Studies evaluating pathophysiology, disease course, and therapeutic options for cardiac arrhythmias have been performed in predominantly male patients. (springer.com)
  • All these results and literature on epidemiology and pathophysiology of sudden cardiac death as well as on possible therapeutic measures were summarized in a monograph. (wikipedia.org)
  • pediatric patients
  • The San Francisco emergency services protocol calls for a basic adult dose of a 2 L bolus of normal saline followed by 500 ml/h, limited for "pediatric patients and patients with history of cardiac or renal dysfunction. (wikipedia.org)
  • myocytes
  • Beta-adrenergic enhancement of sarcoplasmic reticulum calcium leak in cardiac myocytes is mediated by calcium/calmodulin-dependent protein kinase. (springer.com)
  • normal cardiac
  • 2. This Article Has Been Brought to You for Free by www.freud-sigmund.compropagation does not follow the normal Stored in both normal cardiac impulseroute. (slideshare.net)
  • congenital
  • In the autosomal recessive mutation of this gene, homozygous mutations lead to severe prolongation of the QT interval (due to near-complete loss of the IKs ion channel), and are associated with increased risk of ventricular arrhythmias and congenital deafness. (wikipedia.org)
  • intracellular
  • This electrical wave triggers intracellular calcium processes that produce the contractions of the cardiac muscle that pump the blood to the organs of the body. (scholarpedia.org)
  • implantable
  • Management may include avoiding strenuous exercise, getting sufficient potassium in the diet, the use of beta blockers, or a implantable cardiac defibrillator. (wikipedia.org)
  • ectopic
  • Anextra systole interrupts normal Atria arrhythmias originate in the atria:sequence of activation of cardiac - Ectopic atria - ectopic impulsesmuscle. (slideshare.net)
  • 18. Mazhari R, Nuss HB, Armoundas AA, Winslow RL, Marban E. Ectopic expression of KCNE3 accelerates cardiac repolarization and abbreviates the QT interval. (cogprints.org)
  • skeletal
  • Franzini-Armstrong C, Protasi F, Ramesh V. Shape, size, and distribution of Ca(2+) release units and couplons in skeletal and cardiac muscles. (springer.com)
  • A DNA controlled-release coating for gene transfer: transfection in skeletal and cardiac muscle. (cogprints.org)
  • repolarization
  • Mutations resulting in loss of function of K+ channels can result in delayed repolarization of the cardiac muscle cells. (wikipedia.org)
  • Similarly, gain of function of Na+ and Ca2+ channels results in delayed repolarization, and Ca2+ overload causing increased Ca2+ binding to cardiac troponin C, more actin-myosin interactions and causing an increased contractility, respectively. (wikipedia.org)
  • sufficiently
  • Concurrent with efforts by Flight Medicine to improve screening techniques, as NASA enters the era of exploration class missions, it will be critical to determine with the highest degree of certainty whether space flight by itself alters cardiac structure and function sufficiently to increase the risk for arrhythmias. (wikipedia.org)
  • patients
  • The purpose of this fine text is to help inform physicians and surgeons about recent advances in the diagnosis and management of patients with cardiac arrhythmias, and to describe how electrophysiologists can best assist in the care of their patients. (springer.com)
  • This book will prove to be of enormous value both to specialists and generalists responsible for the care of patients with cardiac arrhythmias. (springer.com)
  • The study was prompted by the fact that patients who suffer from myocardial infarctions (MIs) have a high risk of sudden death, presumably due to arrhythmia. (wikipedia.org)
  • Around the time of the study onset (1986), an estimated 8 to 15% of patients would die in the subsequent year following an MI, with about half of those deaths resulting from arrhythmia. (wikipedia.org)
  • This included 1) patients enrolled within 4 to 90 days of a previous MI, 2) a left ventricular ejection fraction lower than 40%, 3) prior to enrollment, suppression of PVCs had occurred with the drugs (vs. placebo) using a double-blinded design, and 4) patients having more serious arrhythmias would also be included. (wikipedia.org)
  • disease
  • Gy├Ârke S, Terentyev D. Modulation of ryanodine receptor by luminal calcium and accessory proteins in health and cardiac disease. (springer.com)
  • mutations
  • Since it affects multiple ion channels, it also shows promise in treating genetic forms of arrhythmia caused by several ion channel mutations. (wikipedia.org)
  • chapter
  • In this chapter will review how dysregulation of ionic homeostasis can lead to arrhythmias with a particular emphasis on channelopathies. (springer.com)
  • drugs
  • The drugs used (encainide, flecainide, and moracizine) successfully reduced the amount of PVCs, but consequently led to more arrhythmia-related deaths. (wikipedia.org)
  • Last, the electrophysiologist may administer various drugs (proarrhythmic agents) to induce arrhythmia. (wikipedia.org)
  • He has held a number of notable positions and received a number of awards.His research contributed to the development of cardiac drugs. (wikipedia.org)
  • With the help of this method a number of antianginal and other cardiac drugs as well as their effect on hemodynamic and cardiac metabolic changes were studied. (wikipedia.org)
  • action potential
  • The product of the KCNQ1 gene is thought to produce an alpha subunit that interacts with other proteins (in particular, the minK beta subunit) to create the IKs ion channel, which is responsible for the delayed potassium rectifier current of the cardiac action potential. (wikipedia.org)
  • vivo
  • The incorporation of an ion channel gene mutation associated with the long QT syndrome (Q9E-hMiRP1) in a plasmid vector for site-specific arrhythmia gene therapy: in vitro and in vivo feasibility studies. (cogprints.org)
  • symptoms
  • Most arrhythmia does not result in symptoms, but people may experience anxiety , lightheadedness, dizziness, fainting, unusual awareness of the heartbeat, and sensations of fluttering or pounding in the chest. (peacehealth.org)