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NCT ID: NCT01083134 Recruiting - Clinical trial for Coronary Artery Disease

The Correlation of Heart Hemodynamic Status Between 320 Multidetector Computed Tomography, Echocardiography and Cardiac Catheterization in Patients With Coronary Artery Disease

Start date: March 2010
Phase: N/A
Study type: Observational

With the advances in multidetector computed tomography (MDCT) technology, CT angiography (CTA) of the coronary arteries using 64-slice or dual-source CT systems has evolved into a robust, alternative, noninvasive imaging technique to rule out coronary artery disease (CAD). Reported sensitivities and specificities of coronary CTA can compete with those of catheter angiography.

Because CT is the major source of ionizing radiation in medicine, dual isotope myocardial perfusion scintigraphy and coronary CTA 16-, 64-slice MDCT and DSCT scanners are associated with the highest amount of radiation dose. Recently, a new generation of MDCT machines with even more detector row (320) has become clinically available. The maximum detector width of 16 cm enables the entire heart to be examined in a single rotation and within a single heartbeat and is expected to substantially reduce artifacts from breathing and body motion. Due to high volume coverage, 320-slice CT machines are able to perform a nonspiral, ECG-gated examination of the heart within a single breath-hold.

The purpose of this study was to investigate the correlation of hemodynamic status of 320 MDCT, echocardiography, and coronary catheterization in patients who suspected coronary artery disease.

NCT ID: NCT01080404 Recruiting - Clinical trial for Obesity

A Study of Surgical Weight Loss to Treat Obstructive Sleep Apnea

Start date: May 2010
Phase: N/A
Study type: Interventional

Obesity is an increasing problem worldwide. Over 20% of people in western societies are obese (BMI >30kg/m2) and 1-2 % are morbidly obese (BMI >40 kg/m2). According to the recent study 6.6% of Finns are severely obese (BMI > 35kg/m2) and 2.0% are morbidly obese (BMI>40kg/m2). Because conventional treatments often fail to induce sustained weight loss obesity surgery has increased rapidly in many countries. Currently, > 300000 procedures are performed in the US each year. Thus in many European countries, including Finland, the need for obesity surgery is rapidly increasing.

The most important risk factor also for obstructive sleep apnea (OSA) is obesity, and thus effective treatment of obesity is the first-line treatment of OSA. However, Reliable information of the prevalence of OSA in morbidly obese patients is still lacking. The current knowledge is based on small studies, which have demonstrated that the prevalence of OSA may be higher than believed, even 70-80% in morbidly obese patients. There is a definite need for large, well-designed, prospective clinical studies to evaluate the effects of weight reduction in OSA and other co-morbidities related to obesity. Ever increasing research data showing a strong link between obesity and OSA and their co-existence as a major risk factor in the development of cardiovascular diseases should provoke concepts to search better clinical guidelines of diagnostics and treatments in a risk group, such as morbidly obese patients.

NCT ID: NCT01078051 Recruiting - Clinical trial for Coronary Artery Disease

Drug-Eluting Stent Implantation Versus Optimal Medical Treatment in Patients With Chronic Total Occlusion (DECISION-CTO)

Start date: March 2010
Phase: Phase 4
Study type: Interventional

The purpose of this study is to compare the safety and effectiveness of drug-eluting stent implantation compared to optimal medical treatment in patients with chronic total occlusion.