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Topic Review
ECG Signs in Cardiac Resynchronization Therapy Response Prediction
Cardiac resynchronization therapy (CRT) is a cornerstone therapeutic opportunity for selected patients with heart failure. For optimal patient selection, no other method has been proven to be more effective than the 12-lead ECG, and hence ECG characteristics are extensively researched. The evaluation of particular ECG signs before the implantation may improve selection and, consequently, clinical outcomes. The definition of a true left bundle branch block (LBBB) seems to be the best starting point with which to select patients for CRT. Although there are no universally accepted definitions of LBBB, using the classical LBBB criteria, some ECG parameters are associated with CRT response. In patients with non-true LBBB or non-LBBB, further ECG predictors of response and non-response could be analyzed, such as QRS fractionation, signs of residual left bundle branch conduction, S-waves in V6, intrinsicoid deflection, or non-invasive estimates of Q-LV which are described in newer publications. 
  • 1.2K
  • 20 Nov 2023
Topic Review
Genetic RyR2 Disease
The ryanodine receptor (RyR2) has a critical role in controlling Ca2+ release from the sarcoplasmic reticulum (SR) throughout the cardiac cycle. RyR2 protein has multiple functional domains with specific roles, and four of these RyR2 protomers are required to form the quaternary structure that comprises the functional channel. Numerous mutations in the gene encoding RyR2 protein have been identified and many are linked to a wide spectrum of arrhythmic heart disease. Gain of function mutations result in a hyperactive channel that causes excessive spontaneous SR Ca2+ release, but rare hypoactive loss of function mutations have also been described.
  • 1.2K
  • 17 Aug 2022
Topic Review
Percutaneous Closure of PFO by Traditional Devices
Patent foramen ovale (PFO) is a cardiac congenital anomaly with high prevalence in the general population (20–30%) and often represents an incidental finding. PFO can be implicated in the pathogenesis of several medical conditions, so called PFO-associated syndromes, including cryptogenic thromboembolism, decompression sickness, migraine, and arterial deoxygenation syndromes. In 1975, King and Mills performed for the first time a percutaneous atrial septal defect closure in humans by using an automatically opening “umbrella-like” device, further refined to the clamshell double-umbrella device, which had the advantage of being recapturable or removable up to the end of the procedure.
  • 1.2K
  • 22 Jul 2022
Topic Review
Coronary Vascular Function and Invasive Physiology Assessment
A considerable number of patients with angina or myocardial ischemia have no significant coronary artery disease on invasive angiography. Several steps towards a better comprehension of the pathophysiology of these conditions, angina or ischemia with non-obstructive coronary arteries (ANOCA/INOCA), have been made.
  • 1.2K
  • 07 Aug 2023
Topic Review
Transcatheter Aortic Valve Implantation
Transcatheter aortic valve implantation (TAVI) is an increasingly widespread percutaneous intervention of aortic valve replacement (AVR). The target population for TAVI is mainly composed of elderly, frail patients with severe aortic stenosis (AS), multiple comorbidities, and high perioperative mortality risk for surgical AVR (sAVR). These vulnerable patients could benefit from cardiac rehabilitation (CR) programs after percutaneous intervention. To date, no major guidelines currently recommend CR after TAVI. However, emerging scientific evidence shows that CR in patients undergoing TAVI is safe, and improves exercise tolerance and quality of life. Moreover, preliminary data prove that a CR program after TAVI has the potential to reduce mortality during follow-up, even if randomized clinical trials are needed for confirmation. 
  • 1.2K
  • 14 Apr 2021
Topic Review
Coronary Heart Disease
Coronary heart disease is a public health problem and is one of the leading causes of loss of quality of life, disability, and death worldwide. A widely used therapeutic option for the treatment of coronary disease worldwide is coronary artery bypass grafting (CABG). A CABG seems to be very beneficial for patients, since in addition to the positive quality of life results, other studies indicate that it positively influences the occurrence of depression [30], can lead to the disappearance of symptoms for around 15 years, decreases death resulting from other causes, reduces hospital admission, and reduces death due to cardiovascular factors.
  • 1.2K
  • 20 Nov 2020
Topic Review
Zinc Homeostasis
Research has indicated that zinc plays a consequential mechanistic role in the protection against oxidative stress as zinc is required for the proper functioning of the antioxidant system, the suppression of inflammatory mediators, and the modulation of zinc transporters. Recently, the mechanisms surrounding ZnT8, ZIP7, and metallothionein have shown to be of particular pathogenic importance and are considered as potential therapeutic targets in disease management. The literature has shown that zinc dysregulation is associated with diabetes and may be considered as a leading contributor to the deleterious vascular alterations exhibited by the disease. Although further investigation is required, studies have indicated the favorable use of zinc supplementation in the protection against and prevention of oxidative stress and its consequences over the course of the condition.
  • 1.2K
  • 29 Mar 2022
Topic Review
Monocytes in Chronic Heart Failure
A long-term condition known as chronic heart failure (CHF) is an ongoing difficulty of the heart in pumping blood enriched in oxygen and required nutrients around the body’s tissues. CHF pathogenesis is associated with various causes, and inflammation is one of the most important factors promoting the condition. In addition, monocytes, a group of cells present in the blood and infiltrating tissues, are known to participate in both pro- and anti-inflammatory processes and thus affect myocardial remodeling over time.
  • 1.2K
  • 14 Feb 2022
Topic Review
Biomolecular Paradigm of Active Resolution Mechanisms in Heart
Inflammation is a complex program of active processes characterized by the well-orchestrated succession of an initiation and a resolution phase aiming to promote homeostasis. When the resolution of inflammation fails, the tissue undergoes an unresolved inflammatory status which, if it remains uncontrolled, can lead to chronic inflammatory disorders due to aggravation of structural damages, development of a fibrous area, and loss of function. Various human conditions show a typical unresolved inflammatory profile. Inflammatory diseases include cancer, neurodegenerative disease, asthma, right heart disease, atherosclerosis, myocardial infarction, or atrial fibrillation. New evidence has started to emerge on the role, including pro-resolution involvement of chemical mediators in the acute phase of inflammation. Although flourishing knowledge is available about the role of specialized pro-resolving mediators in neurodegenerative diseases, atherosclerosis, obesity, or hepatic fibrosis, little is known about their efficacy to combat inflammation-associated arrhythmogenic cardiac disorders. It has been shown that resolvins, including RvD1, RvE1, or Mar1, are bioactive mediators of resolution. Resolvins can stop neutrophil activation and infiltration, stimulate monocytes polarization into anti-inflammatory-M2-macrophages, and activate macrophage phagocytosis of inflammation-debris and neutrophils to promote efferocytosis and clearance.
  • 1.2K
  • 27 May 2022
Topic Review
Diagnosis of Heart Failure in Patients after COVID-19
Coronavirus disease 2019 (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It can lead to myocardial damage. Heart failure (HF) is a significant global health concern and is characterized as a clinical syndrome with symptoms caused by structural and/or functional abnormalities of the heart, confirmed by elevated natriuretic peptide levels and evidence of pulmonary or systemic congestion. The relationship between COVID-19 and heart failure is complex. SARS-CoV-2 can cause cardiac damage through the activation of pro-inflammatory cytokines. Understanding the interactions between the disease and viruses is crucial for optimal patient care. However, the validity of screening for cardiovascular complications after COVID-19 remains unconfirmed, and individualized diagnosis procedures are necessary based on the patient's clinical symptoms.
  • 1.2K
  • 19 Jun 2023
Topic Review
Plant Polyphenols and Their Benefits on Cardiovascular Health
Polyphenols are secondary metabolites found in vegetables, fruits, and grains. These compounds exhibit several health benefits such as immune modulators, vasodilators, and antioxidants.
  • 1.2K
  • 18 Sep 2023
Topic Review
Acute Heart Failure Epidemiology and Management
Acute heart failure (AHF) is defined as a new onset or recurrence of HF symptoms and signs requiring emergency therapeutic interventions. It may occur as the first manifestation of HF, or more frequently as an acute decompensation of chronic HF.
  • 1.2K
  • 02 Feb 2023
Topic Review
Stereotactic Arrhythmia Radioablation
Ventricular tachycardia is a type of arrhythmia (heart rhythm disorder) characterized by fast heart rate (exceeding 100 beats per minute), originating from abnormal electrical impulse localized in heart ventricles. The electrophysiology-guided noninvasive cardiac radioablation, also known as STAR (stereotactic arrhythmia radioablation), is an emerging treatment method of non-invasive treatment for ventricular tachycardia persistent after conventional methods of ablation.
  • 1.2K
  • 10 May 2021
Topic Review
Viral Myocarditis - From Pathophysiology to Treatment
The pathophysiology of viral myocarditis and its sequelae leading to severe heart failure with a poor prognosis is not fully understood and represents a significant public health issue globally. Most likely, at a certain point, besides viral persistence, several etiological types merge into a common pathogenic autoimmune process leading to chronic inflammation and tissue remodeling, ultimately resulting in the clinical phenotype of dilated cardiomyopathy. 
  • 1.1K
  • 05 Jan 2022
Topic Review
Evolution of Extracellular Vesicles’ Knowledge
Extracellular vesicles (EVs) are a family of particles/vesicles present in blood and body fluids, composed of phospholipid bilayers that carry a variety of molecules that can mediate cell communication, modulating crucial cell processes such as homeostasis, induction/dampening of inflammation, and promotion of repair. Since their discovery in 1946, the scientific interest on EVs has increased exponentially promoting promising studies on their possible roles in health and disease.
  • 1.1K
  • 24 Jun 2021
Topic Review
Role of NADPH Oxidases in Pathologies
Nicotinamide adenine dinucleotide phosphate oxidases (NADPH oxidases, NOX), were discovered in immune cells, such as neutrophils and macrophages, in the 1970s. Upon phagocytosis of pathogens, the enzymatic complex is activated and triggers O2− production in an “oxidative burst” that acts to kill pathogens. Over time, enzymes with a similar function located in various tissues have been identified and subsequently grouped into the NOX family of enzymes. The mitochondrial electron transport chain was soon demonstrated as another source of O2− due to a “leaky” electron transport system, its O2− scavenged by superoxide dismutase (SOD) into H2O2.
  • 1.1K
  • 29 Jun 2022
Topic Review
KCNJ5 Mutation in Aldosterone Producing Adenoma
The discovery of the KCNJ5 somatic mutation in aldosteroene producing adenoma (APA) in 2011 and the development of specific CYP11B2 antibodies in 2012 have greatly advanced our understanding of the pathophysiology of primary aldosteronism. PA leads to abnormalities in the renin-angiotensin-aldosterone system and is known to increase the incidence of atrial fibrillation, heart failure, and stroke by 3.52, 2.05, and 2.58 times compared to hypertension due to essential hypertension.
  • 1.1K
  • 26 Aug 2022
Topic Review
Extracellular Vesicles and COVID-19-Related Thrombosis
Extracellular vesicles (EVs) is a term used to describe a heterogeneous group of vesicles located in different types of tissues or biological fluids such as blood, urine, saliva, breast milk and the amniotic, cerebrospinal, synovial, seminal fluid and bronchial lavage. The role of EVs in infectious diseases has been particularly controversial over the last years. It has been shown that they can influence the recipient cell activities by transporting viral proteins, RNA, DNA and receptors from infected cells to healthy cells and thus increasing the spread of virus infection. Thus, EVs may serve as potential predictors of COVID-19 severity.  Importantly, due to their stability in the circulation, low immunogenicity, biocompatibility and biodegradation, the EVs are considered suitable for designing new therapeutic strategies or delivery systems for a vaccine against the SARS CoV-2 infection 
  • 1.1K
  • 02 Jul 2021
Topic Review
Specialized Pro-resolving Mediators in Atherosclerosis
Atherosclerosis is one of the most important problems of modern medicine as it is the leading cause of hospitalizations, disability, and mortality. The key role in the development and progression of atherosclerosis is the imbalance between the activation of inflammation in the vascular wall and the mechanisms of its control. The resolution of inflammation is the most important physiological mechanism that is impaired in atherosclerosis. The resolution of inflammation has complex, not fully known mechanisms, in which lipid mediators derived from polyunsaturated fatty acids (PUFAs) play an important role. Specialized pro-resolving mediators (SPMs) represent a group of substances that carry out inflammation resolution and may play an important role in the pathogenesis of atherosclerosis. SPMs include lipoxins, resolvins, maresins, and protectins, which are formed from PUFAs and regulate many processes related to the active resolution of inflammation. 
  • 1.1K
  • 16 May 2022
Topic Review
Management of Acute Coronary Syndrome in Cancer Patients
Cancer patients have an increased risk of cardiovascular disease and, notably, a significant prevalence of acute coronary syndrome (ACS). It has been shown that an elevated presence of cardiovascular risk factors in this setting leads to an interaction between these two conditions, influencing their therapeutic strategies and contributing to higher mortality. 
  • 1.1K
  • 28 Nov 2022
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