View clinical trials related to Coronary Artery Disease.
Filter by:Coronary CT angiography (CTA) or invasive coronary angiography (CAG) is usually performed to evaluate the severity of coronary stenosis depending on the probability of CAD. However, the stenosis severity is not closely corresponding with the hemodynamic significance in coronary arteries. As a result, fractional flow reserve (FFR) with pressure wire measurement was introduced to functionally assess the coronary stenosis. FFR is defined as the ratio of maximum blood flow distal to a stenotic lesion under hyperemia state to normal maximum flow in the same vessel. The cutoff value of FFR to detect significant ischemia is set to be 0.80, indicating that PCI should be considered if FFR≤0.80. However, FFR does have some limitations, such as risks of pressure wire injury, extra time and cost, and side effects of hyperemic agents. To overcome the limitations of FFR, CTA- and CAG-based methods to functionally assess coronary stenosis were proposed, i.e. FFR derived from CTA (FFRCT) and FFR derived from angiography-based quantitative flow ratio (QFR), which can simultaneously evaluate anatomic and hemodynamic significance of stenotic lesions. A number of studies have demonstrated that FFRCT has high sensitivity and specificity in identifying myocardial ischemia. However, the diagnostic accuracy of FFRCT depends on the image quality of coronary CTA, and it is relatively low in lesions with severe calcification and/or tortuosity. Besides, the methodology of FFRCT relies on computational fluid dynamics, which is complicated and time consuming. As for QFR, it is a novel method for deriving FFR based on 3-dimensional quantitative coronary angiography (3D-QCA) and contrast frame counting during CAG. Recent studies have shown that QFR has good diagnostic performance in evaluating the functional significance of coronary stenosis. The accuracy of QFR is also highly associated with anatomic information, thereby its diagnostic accuracy may be decreased in diffuse, tandem, thrombus-containing, calcified, or torturous lesions, and it is not suitable for prior infarction-related or collateral donor arteries as well. Given the above issues concerning FFRCT and QFR, we proposed a novel approach that integrates coronary CTA and CAG images to calculate FFR (FFRCT-angio) using artificial intelligence. The present study was undertaken to test the diagnostic accuracy of FFRCT-angio in patients with SCAD.
Background: Computed tomography angiography (CTA) is already used in the work-up for transcatheter aortic valve implantation (TAVI) and could partially replace invasive coronary angiography (CAG) to rule out proximal coronary lesions. Objectives: To assess the diagnostic accuracy and yield of pre-TAVI CTA to detect coronary lesions (≥50% DS and ≥70% DS) in the proximal coronary segments on a per-patient and a per-segment level. Methods: The DEPICT CTA database consists of individual patient data of four studies that analysed the diagnostic accuracy of pre-TAVI CTA to detect coronary lesions. For this analysis, diagnostic accuracy was assessed in the left main and the three proximal coronary segments.
Cardiovascular disease, and in particular ischemic heart disease, is the main cause of morbidity and mortality worldwide today (1). Myocardial infarction (MI) presents the most serious clinical entity through its short-term life threatening involvement. The many advances in the management of IDM during the acute phase, namely the increasingly frequent and effective use of reperfusion means (angioplasty and thrombolysis) as well as pharmacological progress, in particular, the management of anti-thrombotic treatment has enabled a significant reduction in intra-hospital mortality, in the medium and long term (2). In fact, the mortality rate dropped from 25-30% before the creation of the cardiac intensive care units (ICUS) around the 1960s, to around 16% in the 1980s and reaching 4 to 6% today. In the latest data from the French FAST MI 2015 register (French Registry of Acute ST-Elevation or Non-ST-elevation Myocardial Infarction) mortality was 2.8% in hospital (3) and 5.3% at 6 months (4). Nevertheless, mortality rates diverge from one register to another and are generally higher compared to randomized controlled clinical trials. In our country, due to the aging of the Tunisian population (currently the oldest population in Africa), as well as the rise in the prevalence of cardiovascular risk factors (5), the incidence of IDM is clearly increasing. However, our local specificities concerning the management of this pathology and the intra-hospital mortality which results from it, remain little described despite the importance of these data in the development of personalized algorithms and the improvement of the quality of this support. the management of CAD ST + in the public sector poses more and more efficiency problems and moves away from international recommendations in our country, an assessment of our national situation is necessary. The objectives of the study are, primary, the incidence of new cases that consult the emergency room for CAD ST + and the treatment delivered to the emergency room, in particular the nature of the treatment for obstruction (primary angioplasty or thrombolysis). Secondary, the evaluation of hospital complications and the future of patients on D30 and after one year from the inclusion's day.
This study evaluates the prognostic value and potential therapeutic impact of combined pressure and flow measurements in the evaluation of epicardial coronary stenosis and microvascular function.
Percutaneous coronary intervention (PCI) and coronary artery bypass graft (CABG) are the golden treatments for stable coronary artery disease (CAD) combined with heart failure (HF). The goal of treating HF patients is to prevent repeated hospitalizations and improve peri-operative survival; clinically, although routines including beta-receptor inhibitors, angiotensin-converting enzyme (ACE) inhibitors, and mineralocorticoids have been shown beneficial for the prognosis, for patients with severely low left ventricular ejection rate, hypotension, and pulmonary disease, the introduction of these drugs in the early postoperative period should still be cautious and may need to be adjusted with related cardiovascular function parameters. Patients with low cardiac output syndrome, ventricular arrhythmia, or hemodynamic instability should be suspected of the failure of bypass grafts if accompanied by changes in the electrocardiogram (EKG) and an increase in myocardial enzymes. Intervention should be carried out as soon as possible after angiography detects graft failure to limit the occurrence of large-scale myocardial injury and prevent the development of severe myocardial failure. This study is start on June 1 2020. And will include 400 patients who have just undergone PCI and 300 CABG patients who diagnosis of stable coronary artery disease. We will register their medical history, medications, and routine medical examinations within one year, and perform tests such as phonocardiography (Audiocor). They will be worn and measured daily at home after discharge. The data of the electrocardiogram and the PPG bracelet will be registered with their continuous daily values. All subjects tracked the occurrence of adverse medical events within one year after discharge from the hospital. Based on the home-based remote personal care model for patients with CABG, a risk prediction model for heart failure and vascular restenosis was established to effectively reduce medical treatment, adverse events, and medical expenditure.
Recent studies have shown that withdrawing aspirin and maintaining P2Y12 inhibitor monotherapy for up to 12 months post-PCI, after a brief period of DAPT, reduces bleeding without increasing ischemic harm. Such effects have shown to of particular benefit in patients with diabetes mellitus (DM). However, if an aspirin-free approach can be considered after this time frame is a matter of debate. The aim of this study is to assess the PD effects of ticagrelor 60 mg with and without aspirin therapy in CAD patients and to compare this with a standard DAPT regimen of aspirin plus clopidogrel.
Prospective, non-randomized, multicenter registry
Clopidogrel is the P2Y12 inhibitor of choice in PCI patients requiring OAC. However, concerns have been raised based on the notion that a considerable number of patients may have inadequate response to clopidogrel. Although practice recommendations indicate that the use of potent P2Y12 inhibitors (i.e., ticagrelor) may be considered in patients at increased thrombotic risk, they do not recommend routine testing to identify patients with poor response to clopidogrel. The aim of this study is to assess the pharmacodynamic effects of different P2Y12 inhibiting therapy (clopidogrel vs ticagrelor) in patients at high risk for high platelet reactivity identified according to the ABCD-GENE score in PCI treated patients also requiring OAC. Up to a total of up to 63 patients are planned to be prospectively enrolled in this investigation which will entail a series of comprehensive pharmacodynamic assessments to reach the study aim.
Drug coated balloon (DCB) is a relatively new technology which allows the treatment of coronary artery disease without permanent implantation of a metallic scaffold (stent) in the coronary artery. It is recommended by international guidelines for the treatment of in-stent restenosis (i.e. when a previously implanted stent in the coronary artery develops narrowings again). Data on patient outcomes of patients treated with DCB for de novo coronary artery disease (narrowings in artery supplying blood to the heart that has not been previously treated with a stent) are limited to relatively small studies. In our institution, DCBs have been used over the last 10 years and we have developed a large clinical database. We intend to compare the outcomes of all our patients treated clinically with DCB vs patients treated with drug eluting stent (DES). We will, incorporate all patients presenting either with myocardial infarction (heart attack) or stable angina. Our main outcomes will be: Primary 1) mortality Secondary 1) cardiac mortality 2) cardiac rehospitalisation3) composite of cardiac mortality and cardiac rehospitalisation
Diabetes mellitus (DM) is one of the main risk factors for ischemic events in patients with coronary artery disease (CAD) and diabetes is a factor in several post-PCI (Percutaneous Coronary Intervention) risk scores. However, until recently, there were almost no studies performed specifically in the diabetic population of patients undergoing PCI. This study aims to describe the anti-thrombotic regimens, clinical outcomes and current diabetes medical treatment in an unselected consecutive population of patients with DM undergoing PCI.