View clinical trials related to Calcinosis.
Filter by:A study of the natural history of bone and mineral disease (BMD) in patients with end-stage renal disease before and after kidney transplantation
The purpose of the CAMONA study is to demonstrate the feasibility of cardiovascular molecular calcification (CMC) assessment by means of 18F-sodium-fluoride (18F-NaF) positron emission tomography (PET) computed tomography (CT) in a prospective cohort of healthy control subjects and subjects with cardiovascular disease.
1. objectives - Evaluate the performance of Venus MedTech aortic valve prosthesis intervention by femoral artery - Evaluate safety and clinical benefit of percutaneous implantation of the Venue MedTech aortic valve prosthesis. - Continuous observe 12 months of safety and efficacy. 2. Approximately 80 patients presenting with native aortic valve stenosis necessitating valve replacement which are considered unsuitable for Surgical Valve Replacement, with a high surgical risk, as attested to by both the surgeon and the cardiologist are recruited in the study. 3. Safety and performance will be evaluated at discharge and at 30 days post procedure. Valve safety, performance and placement will be followed up at 6 and 12 months post-procedure.
The investigators hypothesize that the chronic kidney disease patients who suffer from vitamin D deficiency will be benefit from given Vitamin D2 because coronary artery calcification and hyperparathyroidism will be improved.
Active vitamin D at therapeutic dose may prevent vascular calcification but in supraphysiologic dose may precipitate it.
The aim of this study was to evaluate whether successful sub-total parathyroidectomy retards cardiovascular calcification in patients with hemodialysis and to investigate the mechanism .
Vessel calcification is a recognised cardiovascular morbidity risk factor in patients with chronic kidney disease (CKD). Recent reports indicate a significant role of Matrix Gla-protein (MGP) in decreasing calcification processes. MGP is excretion protein whose mechanism of action is not yet fully explained and which to be activated requires phosphorylation and carboxylation where cofactor is vitamin K. These observations indicate that shortage of vitamin K is a significant risk factor for the development of vessel calcification. Another calcification risk factor in CKD patients are calcium-phosphate disturbances and insufficiency of vitamin D3 which in physiological concentration stimulates MGP transcription. The aim of this study is estimation of influence of vitamin K2 administration over the period of 9 months on vessel calcification in 3.- 5. stage CKD patients. It is a prospective, randomised double-blind study carried out in parallel groups. 60 patients with CKD (GFR 15-60 ml/min) with calcium score >10 (Agatston scoring system) will be qualified for the study. On the basis of randomised selection, patients will be divided into two groups: 30 patients will be given 90 μg vitamin K2 + 10 μg and cholecalciferol 30 patients will be given only 10 μg cholecalciferol. After a 9-month treatment the image diagnostic will be carried out in order to estimate the degree of vessel calcification.
Intervention study focused on preventing the progression of aortic valve calcification. Vascular and cardiac calcifications are a marker of risk and poor outcome, especially the severe calcified aortic stenosis and coronary calcification. Its increasing prevalence is now a health problem. The knowledge and the therapeutic objective of this condition have changed in recent years and pathophysiological aspects at present, focus on atherosclerotic disease and inflammation. Several clinical trials have failed to demonstrate that statins or ACE inhibitors prevent the progression of cardiovascular calcification. Taking into account the new concepts of ectopic calcification and research results from our group, the most logical approach to prevent progression would be an early intervention and management of the calcification inhibiting agents such as phytate (inositol six-phosphate -- InsP6). Hypothesis: The phytate prevents or delays the progression of cardiovascular calcification. It is a clinical trial of intervention of oral phytate (InsP6) in patients with mild to moderate cardiovascular calcification (aortic valve and / or coronary arteries) compared with placebo over a period of 24 months. It is a prospective, randomized minimization of variables to ensure homogeneity of the groups. The primary analysis will be the time evolution of the extent of calcium in the aortic valve and coronary arteries made with CT. Secondary variables are the degree of progression of aortic stenosis and clinical events (death, stroke, angina, stroke and cancer of any type).
Peritoneal dialysis patients are at increased risk of cardiovascular morbidity and mortality and are related to the presence of accelerated atherosclerosis. Our recent data showed that inflammation predicts mortality and cardiovascular death, independent of other cardiovascular risk factors in peritoneal dialysis patients. As a considerable proportion of peritoneal dialysis patients showed evidence of inflammation, it raises an important question as to whether anti-inflammatory treatment has any cardiovascular and survival benefit in these patients. The peroxisome proliferator-activated receptor-gamma (PPAR-g) agonist is a class of drug with insulin sensitizing property. Recent experimental and clinical studies demonstrated that this class of drug has anti-inflammatory and anti-atherosclerotic properties other than insulin sensitizing effect in type 2 diabetics. We therefore hypothesize that modulation of the PPAR-g activity may be a novel therapeutic strategy for reducing inflammation and retarding the progression of atherosclerosis and possibly lowering mortality in our peritoneal dialysis patients.
This study has four objectives: 1) to provide investigators the opportunity to study bone specimens from patients with various skeletal diseases; 2) to treat patients with skeletal diseases at the NIH; 3) to expose NIH trainees to certain skeletal diseases; and 4) to gain more knowledge about skeletal diseases and stimulate further study of bone biology. Anyone with a disease that affects the skeleton may be eligible for this study. All evaluations, tests, procedures and treatments given study participants are used in the standard care of skeletal diseases. No experimental evaluations or treatments are offered. Patient evaluations include a medical history, review of medical records and routine physical examination. Based on the findings, other procedures may be recommended, including blood tests, urine tests, and imaging tests, such as X-rays, bone densitometry, bone scan, computed tomography (CT) and magnetic resonance imaging (MRI). Bone specimens from participants will be collected for research use. Specimens will be obtained from bone removed during a patient s planned surgical procedure performed for medical care, or patients may be requested to have a bone biopsy removal of a small piece of bone tissue as part of the patient evaluation procedure.