View clinical trials related to Ventricular Remodeling.
Filter by:A prospective of 30 patients with symptomatic severe congenital valvular pulmonary stenosis who are indicated for percutaneous balloon pulmonary valvuloplasty . the aim is to 1. - evaluate electrical and mechanical remodeling of RV 6 months following balloon dilation 2. - evaluate Functional capacity using 6MWT and SaO2 before and 6 months following BPV
Prospective trials performed on type 2 diabetes patients without established cardiovascular disease has shown that SGLT2 inhibitors reduce cardiovascular risk. No studies have yet examined the occurrence of cardiovascular disease in patients with acute myocardial infarction. The investigators designed the current study to evaluate the most ideal oral hypoglycemic agent in type 2 diabetes patients undergoing percutaneous coronary intervention for acute myocardial infarction. The investigators hypothesize that the use of SGLT-2 inhibitors will reduce cardiovascular events and modify left ventricular remodeling after myocardial infarctions.
Dapagliflozin is a molecule belonging to the class of sodium-glucose transporter type 2 (SGLT2-i) inhibitors. This type of drug, initially used in the treatment of diabetes mellitus, has in recent years demonstrated significant prognostic benefit in patients with heart failure even in the absence of diabetes mellitus. The new international heart failure guidelines have taken up this evidence by suggesting the use of SGLT2-i therapy in patients with heart failure with reduced ejection fraction (HFrEF). Given the drug's recent introduction into clinical routine, the evaluation of "field" experience is important to refine the clinical management of patients treated with SGLT2-i. Moreover, SGLT2-i has currently been shown to be effective in some small preliminary studies in improving ejection fraction and some echocardiographic parameters of ventricular remodelling on top of concomitant optimal medical therapy, although further data are needed in this regard. In particular, the potential benefit of SGLT2-i therapy on exercise capacity, respiratory function parameters, biomarkers and left ventricular remodelling in patients with heart failure has not been extensively studied at present. In this regard, the cardiopulmonary exercise test (CPET) allows the derivation of prognostic functional parameters in patients with chronic heart failure such as peak VO2 and the ventilation/CO2 slope. CPET is a valid, recognised and accurate tool for risk stratification in patients with heart failure. In addition, there are no data available on the effect of SGLT2-i on lung diffusion (DLCO) and specific markers of the alveolar-capillary membrane, such as surfactant binding proteins, as well as on the presence of sleep apnoea, a particularly relevant parameter for the prognosis of decompensated patients. The aim of the study is to evaluate changes in exercise capacity, spirometry, DLCO, echocardiographic parameters of left ventricular systolic-diastolic function, Nt-proBNP dosage, ST-2, surfactant binding proteins, sleep apnoea, impedance measurement and quality of life in a single-centre cohort of 70 patients with heart failure with stable reduced left ventricular ejection fraction (functional class NYHA II and III) and guideline candidates for treatment with Dapagliflozin. Patients will undergo, as per regular clinical practice, an initial assessment (baseline) that will include a clinical evaluation, KCCQ questionnaire for quality of life assessment, spirometry, DLCO, impedance measurement, polysomnography, a cardiopulmonary ramp test, blood tests with dosage of Nt-proBNP, ST-2 and surfactant binding protein, and a standard transthoracic echocardiogram. At baseline, the patient will start treatment with Dapagliflozin at the standard dosage of 10mg/day. A similar evaluation with the same study procedures will be performed 6 months after the start of therapy. A re-evaluation of the patient including venous blood sampling is planned between 2 and 4 weeks after the start of Dapagliflozin from clinical practice. In the context of this sampling, the assay of the biomarkers under study will also be repeated.
Heart failure (HF) is the most common nosology encountered in clinical practice. Its incidence and prevalence increase exponentially with increasing age and it is associated with increased mortality, more frequent hospitalization and decreased quality of life. An initial approach to the treatment of HF patients with reduced left ventricular (LV) systolic function and left bundle branch block (LBBB) was implantation of cardioresynchronization device using biventricular pacing. This has resulted in long-term clinical benefits such as improved quality of life, increased functional capacity, reduced HF hospitalizations and overall mortality. However, conventional cardiac resynchronization therapy (CRT) is effective in only 70% of patients. And the remaining 30% of patients are non-responders to conventional CRT. Subsequently, His bundle pacing (HBP) has been developed to achieve the same results. According to other studies HBP has showed greater improvement in hemodynamic parameters than with conventional biventricular CRT. But, nevertheless, there are significant clinical troubles with HBP. In this regard, in 2017, the left bundle branch pacing (LBBP) was developed, which demonstrated clinical advantages compared to biventricular CRT. This method has become an alternative to HBP due to the stimulation of LBB outside the blocking site, a stable pacing threshold and a narrow QRS duration. A series of case reports and observational studies have demonstrated the efficacy and safety of LBBP in patients with CRT indications. However, it is not enough data about CRT with LBBP effectiveness in LV remodeling, reducing mortality and complications. According to our hypothesis, CRT with LBBP compared with conventional biventricular CRT will significantly improve the clinical outcomes and reverse LV remodeling in patients with chronic HF with reduced LV ejection fraction and reduce the number of non-responders to conventional CRT.
Heart failure (HF) is the most common nosology encountered in clinical practice. Its incidence and prevalence increase exponentially with increasing age and it is associated with the increased mortality, more frequent hospitalization and decreased quality of life. An initial approach to the treatment of HF patients with reduced left ventricular (LV) systolic function and left bundle branch block (LBBB) was implantation of device for cardiac resynchronization therapy using biventricular pacing. This has resulted in long-term clinical benefits such as improved quality of life, increased functional capacity, reduced HF hospitalizations and overall mortality. However, conventional cardiac resynchronization therapy (CRT) is effective in only 70% of patients. And the remaining 30% of patients are non-responders to conventional CRT. Cardiac conduction system pacing is currently a promising technique for these patients. Particularly, His bundle pacing (HBP) has been developed to achieve the same results. According to other studies HBP has shown greater improvement in hemodynamic parameters comparing with conventional biventricular CRT. But, nevertheless, there are significant clinical troubles with HBP, especially high pacing threshold. In this regard, in 2017, the left bundle branch pacing (LBBP) was developed, which demonstrated clinical advantages compared to conventional biventricular CRT. Also, since 2019, left bundle branch pacing-optimized CRT (LBBPO CRT) has been used in clinical practice. These methods have become an alternative to HBP due to the stimulation of LBB outside the blocking site, a stable pacing threshold and a narrow QRS complex duration on electrocardiogram. A series of case reports and observational studies have demonstrated the efficacy and safety of LBBP and LBBPO CRT in patients with CRT indications. However, it is not enough data about impact of CRT with LBBP and combined CRT with LBBP and LV pacing on myocardial remodeling, reducing mortality and complications. According to our hypothesis, CRT with LBBP and combined CRT with LBBP and LV pacing compared with conventional biventricular pacing will significantly improve the clinical outcomes and reverse myocardial remodeling in patients who are non-responders to biventricular CRT with HF, reduced LV ejection fraction and with indications to CRT devices with defibrillator function (CRT-D) or one of the CRT-D leads replacement.
A prospective, multi-center, single-arm study. This study will enroll a maximum of 35 subjects treated with the Revivent TC System.
Reducing NOX-2, MMP-9, and TGF-β1 Expression in Preventing Ventricular Remodelling Post Acute ST-Segment Elevation Myocardial Infarction using Colchicine (Post Late Reperfusion Percutaneous Coronary Intervention and Non-Reperfusion and In Vitro Study on Ischemic Rat Cardiomyocyte Culture Model). Coronary heart disease (CHD) is the most common cause of mortality and disability worldwide. The handling of reperfusion in Indonesia is still far below the required standard. Most STEMI patients in Indonesia arrive late to a health facility with symptoms that have been present for more than 12 hours (late-onset). Heart failure following a myocardial infarction is one of the long-term complications of STEMI. Patients with STEMU who do not receive reperfusion were more likely to develop this consequence. According to several studies, microtubules in cardiomyocytes have been identified as an essential regulator of cardiomyocytes' ability to respond to shear stress, which offers compression resistance and facilitates mitochondrial energy production. Microtubule densification, which occurs due to remodelling in heart failure, disrupts the microtubule network. The role of reactive oxygen species (ROS) produced by ischemic myocardium in this remodelling is thus inextricably linked. NADPH oxidase is one of the enzymes involved (NOX). NOX-2 levels have been reported to be higher in myocardial infarction and cardiac remodelling, and it has a close interaction with microtubule network, with damage of microtubule tissue increasing NOX-2 generation of reactive oxygen species. By eroding the ECM and triggering cytokines and chemokines to recruit inflammatory cells to eliminate necrotic cardiomyocytes, matrix metalloproteinase 9 (MMP-9) aids tissue rebuilding. Induction and activation of endogenous TGF-signaling pathways after myocardial infarction have also been discovered to play a function. TGF-β may play a role in the resolution of the inflammatory response in the early stages of infarct repair by inactivating macrophages and decreasing endothelial cell chemokine and cytokine production. TGF-β stimulates the fibrogenic pathway by causing extracellular matrix deposition and fibrosis later. Colchicine is a commonly prescribed anti-inflammatory medication with a low cost. the mechanism of colchicine is tubulin binding, which prevents microtubule assembly and polymerization. Colchicine inhibits microtubule development at low concentrations and promotes microtubule depolymerization at higher concentrations. Several studies have demonstrated that low-dose colchicine can help reduce severe cardiac outcomes such as cardiovascular mortality, stroke, and cardiac arrest following myocardial infarction. Colchicine is known to cause partial restoration of microtubule tissue in the perinuclear region. Colchicine has also been shown in earlier research to reduce the expression of MMP-9, NOX2, and TGF-β This study aims to evaluate whether colchicine could prevent ventricular remodelling in STEMI patients with delayed reperfusion and non reperfusion. The minor hypothesis of this study was colchicine can lower NOX-2, MMP-9, and TGF-β expression in the clinical situation of patients with delayed and non-reperfusion STEMI following PCI. Randomization with 1:1 allocation were used to classify the patients, each group include 41 patients with one group receiving colchicine therapy and standard therapy and the other receiving standard therapy only. Colchicine administration was the independent variable. STEMI patients with delayed and non-reperfusion IKP who met the inclusion criteria are included in this randomized clinical trial. Left ventricular end-diastolic volume (LVEDV) was the dependent variable while serum MMP-9, NOX-2, and TGF-β were the intermediate variables. In the treatment group, colchicine 1 mg is administered before PCI or admission to the ICCU, and colchicine is continued at 0.5 mg/day for a month. Within 24 to 36 hours of treatment initiation, the patient had echocardiography, NOX-2, MMP-9, and TGF-β levels evaluated. On days 4-5, a second NOX-2, MMP-9, and TGF-β screening were performed. The follow up two months after treatment initiation includes an assessment of drug compliance, symptoms, and echocardiography. Depending on the normality of the data distribution, the difference between groups is performed using the unpaired T-test or the Mann-Whitney test. The significant difference between the treatment groups is indicated by a p-value of 0.05.
The goal of this study is to investigate the genetic and gender specific differences, in patients with low flow low gradient aortic stenosis and high flow high gradient aortic stenosis. Patients referred for surgical aorticvalve replacement will be offered to participarte in the study. The main questions the study aims to answer are: 1. Low-gradient aortic stenosis is associated with differences in valvular concentration of the genes that code for mast-cell chymase, Angiotensin-II, ACE, ACE2 and Angiotensin receptor 1 and 2. 2. Low-gradient aortic stenosis is associated with differences in the genetic code of renin-angiotensin-aldosterone system. 3. Gender differences in LV remodelling associates with different levels of sexual hormones. Patients participating in the study will be asked to undergo: - Cardiac ultrasound, MR- and CT-scan prior to surgery - Blooddraw prior to surgery. - Heartmuscle biopsy during surgery - Cardiac MR-scan 1 year after surgery.
Long COVID or Postacute sequelae of COVID-19 infection (PASC) are increasingly recognised complications, defined by lingering symptoms, not present prior to the infection, typically persisting for more than 4 weeks. Cardiac symptoms due to post-acute inflammatory cardiac involvement affect a broad segment of people, who were previously well and may have had only mild acute illness (PASC-cardiovascular syndrome, PASC-CVS). Symptoms may be contiguous with the acute illness, however, more commonly they occur after a delay. Symptoms related to the cardiovascular system include exertional dyspnoea, exercise intolerance chest tightness, pulling or burning chest pain, and palpitations (POTS, exertional tachycardia). Pathophysiologically, Long COVID relates to small vessel disease (endothelial dysfunction) vascular dysfunction and consequent tissue organ hypoperfusion due to ongoing immune dysregulation. Active organs with high oxygen dependency are most affected (heart, brain, kidneys, muscles, etc.). Thus, cardiac symptoms are often accompanied by manifestations of other organ systems, including fatigue, brain fog, kidney problems, myalgias, skin and joint manifestations, etc, now commonly referred to as the Long COVID or PASC syndrome. Phenotypically, PostCOVID Heart involvement is characterised by chronic perivascular and myopericardial inflammation. We and others have shown changes using sensitive cardiac MRI imaging that relate to cardiac symptoms (Puntmann et al, Nature Medicine 2022; Puntmann et al, JAMA Cardiol 2020; Summary of studies included in 2022 ACC PostCOVID Expert Consensus Taskforce Development Statement, JACC 2022, references below). Early intervention with immunosuppression and antiremodelling therapy may reduce symptoms and development of myocardial impairment, by minimising the disease activity and inducing disease remission. Low-dose maintenance therapy may help to maintain the disease activity at the lowest possible level. The benefits of early initiations of antiremodelling therapy to reduce symptoms of exercise intolerance are well recognised, but not commonly employed outside the classical cardiology contexts, such as heart failure or hypertension. As most patients with inflammatory heart disease only have mild or no structural abnormalities, they are left untreated (standard of care). The aim of this study is to examine the efficacy of a combined immunosuppressive / antiremodelling therapy in patients with PASC symptoms and inflammatory cardiac involvement determined by CMR, to reduce the symptoms and inflammatory myocardial injury and thereby stop the progression to reduced LVEF, HF and death. References: https://www.nature.com/articles/s41591-022-02000-0 https://jamanetwork.com/journals/jamacardiology/fullarticle/2768916 https://www.jacc.org/doi/abs/10.1016/j.jacc.2022.02.003
For patients with anterior ST elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI), whether early application of proprotein convertase subtilisin kexin type 9 (PCSK9) inhibitors to rapidly reduce low-density lipoprotein cholesterol (LDL-C) before PCI could effectively inhibit left ventricular remodeling has been rarely reported. The aim of this study was to investigate the effect of early application of PCSK9 inhibitors Evolocumab to rapidly reduce LDL-C levels before primary PCI treatment on left ventricular remodeling in STEMI patients. Eligible patients were randomly randomized 1:1:1 to one of the following three groups immediately after enrollment: (1) Intensive statin group: rosuvastatin 20 mg per day, in addition to usual therapy; (2) Combined intensive statin and PCSK9 inhibitor group: rosuvastatin 20 mg per day and subcutaneous injection of evolocumab 140 mg twice a month, for at least 3 months, and preferably 6 months; (3) PCSK9 inhibitor alone group: subcutaneous injection of evolocumab 140 mg, twice a month for at least 3 months and preferably 6 months.