Active clinical trials for "Ischemia"

The objective of this pilot study is to investigate the feasibility of performing umbilical cord milking in neonates who are depressed at birth.

The purpose of this study is to evaluate the effects of hypercapnia on hemodynamics and cerebral oxygenation during shoulder arthroscopy.

The main objective of this study will be to compare the diagnostic performances of 82Rubidium-PET associated to pharmacologic stress (Persantine) to 99mTc-Sestamibi-SPECT with CZT cameras associated to a stress test (exercise, pharmacological, mixed) for detection of myocardial ischemia in a population of overweighed patients on one hand, and women on the other hand, in a population with an intermediate prevalence of coronary artery disease (≥ 3 cardiovascular risk factors in asymptomatic patients or prevalence of CAD ≥ 30 % using the DIAMOND-FORRESTER score in symptomatic patients).

During the birth process certain conditions can cause oxygen delivery and/or blood flow to the baby's brain to become interrupted. This can cause permanent brain damage. Brain damage occurs in two phases. The first occurs at the time of injury when brain cells in the affected area 'die'. There is nothing that can be done about this. The second phase of injury occurs over the next few days. This second phase is caused by inflammation and release of toxic chemicals from the injured site. Cooling the baby to a temperature of 92.5° F, for 3 days has been shown to reduce the second phase of injury and bran death. All babies will receive the benefit of cooling. Although cooling helps it does not completely stop the second phase of injury. Melatonin is a naturally occurring hormone that is produced by the brain, and helps regulate the sleep-wake cycle. It has the potential to stop the second phase of brain injury by inhibiting inflammation and release of toxic chemicals. The reason for this research is to find out if melatonin can or cannot improve the outcome of babies with this kind of brain damage. Every baby enrolled in the study has a 50:50 chance of getting melatonin. A total of six doses of medicine will be given. The baby's brain function will be assessed by an EEG, brain oxygen monitoring, and a neurologic examination at 18 months of life. All of these are routinely used as part of standard care for patients with this kind of problem. The only difference is that half the babies enrolled in the study will get the drug called melatonin and the other half will receive placebo. The dose of melatonin being used in the study is higher than the amount normally produced by the body. No side-effects of this dose have been reported in other research studies using melatonin in newborn and premature babies.

The purpose of this study is to assess the efficacy and safety of Naoxintong Capsule in the secondary prevention of ischemic stroke by the multi-center, randomized,double-blind，placebo-controlled trial design project.

Coronary artery disease (CAD, coronary heart disease) is the leading cause of death in the U.S., causing 1 in 5 deaths in 2005. The current method for diagnosing coronary artery disease that is considered most accurate is coronary angiography however it involves risk and radiation. Alternatively nuclear imaging test and MRI stress test only permits the semi qualitative analysis of the myocardial perfusion images. In this proposal the investigators will develop a means to calculate Coronary Flow Reserve (CFR) using the MRI. the investigators approach has the potential to reduce mortality from myocardial infarction by effecting a change in the patient management paradigm. Absolute quantification of myocardial perfusion will detect coronary stenosis and CAD in patients with more accuracy than the semi-quantitative or qualitative analysis of perfusion images. Measurement of Coronary Flow Reserve is important for the following reasons: decrease of coronary flow reserve has been identified as a first effect of CAD; it provides an objective measure of treatment efficacy. The purpose of this study is to compare images from nuclear stress test and/or coronary angiography with Magnetic Resonance Imaging (MRI) that will evaluate subjects with coronary artery disease calculating myocardial blood flow using a novel MRI technique combined to an extracellular Gadolinium-based contrast agent and stressor agent

The purpose of the study is to evaluate the ability of IVIG to affect the rate of progression of brain ischemia, as evidenced by neuroimaging. The results of an ongoing epidemiological study indicate that patients with primary immunodeficiency (PID) on IVIG replacement therapy have an overall prevalence of stroke that is 5 times less than in the general population. Even more striking is the absence of stroke in IVIG-treated PID patients over 65, while in the same general population age group the stroke prevalence goes up to 8.1%. This suggests that the degree of stroke protection correlates with the length of IVIG treatment, since older PID patients have been treated with IVIG significantly longer than younger ones.

Acute ischemic stroke (AIS) is the most common type of stroke, which has high rate of morbidity, mortality and disability. A large number of studies have confirmed that the thrombolytic therapy can effectively open blood vessels and improve the functional prognosis of acute ischemic stroke. Therefore, all guidelines recommend giving thrombolysis treatment to acute ischemic stroke patients within 4.5 hours of onset. However, about 1/3 patients receiving thrombolysis will have good prognosis, while a large number of patients will still be disabled and even dead. How to improve the neurofunctional prognosis of thrombolytic patients has been a hot topic in the world. Butyl phthalide is type I chemical drugs. Some multicenter randomized, double-blind, placebo-controlled clinical trials have showed that acute ischemic stroke patients taking butyl phthalide has better lateral branch circulation and living ability score than patients taking placebo. Besides, butyl phthalide treatment is safe. The animal experiment indicated that buphthalein could significantly improve secondary side branch circulation, recover the microarterial diameter of the soft meninges in the ischemic region and increase the blood flow rate. Based on the discussion, we assume that: giving butyl phthalide to patients with acute ischemic stroke in advance, might promote and improve the formation of collateral circulation to freeze ischemia penumbra. Based on this hypothesis, we would like to explore the efficacy and safety of butyl phthalide combined with rtPA thrombolysis in the treatment of acute ischemic stroke.

This is a Pilot Trial Using Chelation Therapy for Limb Preservation in Diabetic Patients with Critical Limb Ischemia.

Remote ischemic conditioning (RIC) is a noninvasive strategy in which one or more cycles of brief and transient limb ischemia confers protection against prolonged and severe ischemia in distant organs.This study aimed to investigate whether RIC is safe and effective in patients with AIS complicating ACS