View clinical trials related to Coronary Angiography.
Filter by:The purpose of this study is to establish the rate of radial artery occlusion post transradial cardiac catheterization through different modalities. The study hypothesis is that specialized imaging can provide specific information to help identify hand complications after cardiac catheterization through the wrist.
Abdominal aortic aneurysms (AAA) are localized, blood-filled dilations (balloon-like bulges) of the aorta. Approximately 90% of abdominal aortic aneurysms occur infrarenally (1). It is most commonly asymptomatic and can be detected randomly during screening. Its prevalence rate in men aged 65 years and more is 5 - 8% (3). The risk factors for the occurrence of AAA are male gender, advanced age, history of atherosclerosis, cigarette smoking and 1st degree family history (4). The prevalence rate is higher in patients with history of atherosclerosis of peripheral blood vessels and coronary arteries (5 - 7). As the size of an aneurysm increases, there is an increased risk of rupture, which can result in severe hemorrhage and death. The death rate due to rupture in the elderly population is 90% (3, 8). Elective surgical repair of the abdominal aortic aneurysm is associated with a death rate of 8% (9). Therefore, the importance of the screening of populations at elevated risk is obvious (5 - 7, 10 -14). Among imaging techniques, ultrasonographic screening for abdominal aortic aneurysm is technically simple, accurate and devoid of ionizing radiation. Ultrasonographic diagnosis of AAA is associated with a major reduction in the incidence of abdominal aortic aneurysm-related mortality (15 - 19). The sensitivity of ultrasonographic screening for abdominal aortic aneurysm is about 100% (19). The most common clinical indications for ultrasonographic screening for abdominal aortic aneurysm are a palpable abdominal mass, hemodynamic impairment of aortic system in lower extremities, pain in the chest, lower back or scrotum, and abdominal bruits. Ultrasonography is used to screen for aneurysms when the outer aortic diameter is more than 3 cm (normal diameter of the aorta is around 2 cm (20). There is disagreement regarding the follow-up of patients after detection of abdominal aortic aneurysm in diameter of 2.6 cm - 2.9 cm (22). Random detection of abdominal aortic aneurysm where the aortic diameter is 2.6 cm, in men aged 65 years and more, have been associated with no risk for its future significant development (21). Ultrasonographic evaluation of abdominal aorta is a challenge for clinicians because of the need for the accurate detection of aortic diameter (20).
Percutaneous treatment of bifurcation lesion is a complex procedure. After main vessel stent implantation, the side branch became jailed and the carina can be displaced resulting in complete occlusion of this vessel. Re-wiring the side branch in this conditions may result difficult and some times impossible. There is no agreement regarding the need of side branch pre-dilation (before main vessel stent implantation) to reduce these complications. Researchers from European Bifurcation Club have proposed no to pre-dilate the side branch to avoid vessel dissection and difficulties in rewiring the true lumen of the vessel. On the contrary, our group has a good experience in the treatment of bifurcation lesions treated with side branch pre-dilation. Aims: 1.- To determine the efficacy of the side-branch pre-dilation in patients with bifurcations lesions treated with provisional T stenting. 2.- To determine the success rate and incidence of complications in patients with and without side-branch pre-dilation, as well as economic impact in terms of number of used wires.
The investigators will investigate patients undergoing coronary angiography with normal coronary but slow blood flow that was normalized after adenosine injection into the coronary artery. The investigators believe that they have small vessel coronary disease which is the initial presentation of coronary disease prior to anatomical narrowing. To alleviate this phenomenon the investigators intend to examine the long-term clinical response of these patients to treatment with dipyridamole, a well-known medication with almost no side-effects that increases the level of adenosine in the tissue.
In the treatment of coronary heart disease which is the major cause of heart attack, direct mechanical treatment with catheters such as the coronary angiography, coronary balloon intervention and stenting intervention are the mainstay of therapy in recent years. In that procedures, the investigators should use the contrast media, and it may cause kidney toxicity especially in the patients with underlying kidney disease and decreased kidney function. The investigators intended to find out which contrast agent has less kidney toxicity in the catheter based treatment of coronary arterial diseases in patients with underlying decreased kidney function
Transradial approach of cardiac catheterization is a common alternative to transfemoral access for diagnostic coronary angiography and percutaneous coronary interventions (PCI). The transradial approach reduces access site bleeding complications and the procedural discomfort of the patients. Transradial procedures may be performed by cannulation of the right or left radial artery and at present, the choice of the right or left radial artery depends largely on the operator' s preference. The aim of this study is to evaluate safety and efficacy of transradial approach comparing the right radial versus the left radial approach in coronary diagnostic and interventional procedures. The investigators will enroll consecutively for 12 months all patients who undergo to diagnostic or interventional procedures through trans radial approach in two Italian centers (Casilino Policlinic, Catholic University-Rome). Primary end point of the study is the fluoroscopy time and the radiation dose adsorbed by the patients. Secondary end-points are: contrast amount, time to obtain the first angiography, procedural shift rate, number of catheters employed, major complications. The investigators pre-specified a sub-study in patients older than 75 years old with the same end-points.
USF Hemostasis - USage of HemCon for Femoral Hemostasis after Percutaneous Procedures. A Comparative Open Label Study The purpose of this trial is to test HemCon pad after diagnostic percutaneous coronary angiography as an adjunct to manual compression to better control vascular access site bleeding and reduce time-to-hemostasis. We hypothesize that the use of HemCon bandage (containing a carbohydrate called chitosan, found in the shells of shrimp, lobster and beetles) will shorten the time needed to achieve hemostasis, time to patient's ambulation, and patient's satisfaction without increasing vascular complications. 278 patients undergoing diagnostic coronary angiography receiving 2500 u intravenous Heparin will be studied and randomized for manual homeostasis with either a HemCon or a regular pad. Primary efficacy endpoint will be time to hemostasis. Secondary endpoints will be safety (complication rate) and satisfaction of patients regarding time to sitting incline and time to ambulation. 25% of patients from each arm will be randomized for Duplex examination of the femoral artery at the access site.
The purpose of this study is to investigate the effects of heart rates (including maximum heart rate, average heart rate and minimum heart rate) and variability of heart rate on image quality of DSCT coronary angiography without control of heart rate experienced in our department.
Angiographic evaluation for intermediate lesions is not always accurate. Fractional flow reserve-guided deferral strategy for these lesions showed the same event rate as routine intervention strategy. However, proper FFR criterion for these lesions in the era of drug-eluting stent is not known. This study sought to evaluate the clinical outcomes of intermediate lesions according to FFR and compare those of FFR-guided intervention with routine drug-eluting stent implantation strategy.
This is a prospective, randomized multicenter trial comparing MSCT to standard of care (SOC) diagnostic treatment in the triage of Emergency Department (ED) low to intermediate risk chest pain patients. Our hypotheses are that compared to SOC treatment, MSCT is equally safe and diagnostically effective, as well as more time and cost efficient.