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Discover 23,476 clinical trials near Baltimore, Maryland. Find research studies in your area.
Showing 23141-23160 of 23,476 trials
NCT00236132
The main goal of the pectus multicenter outcomes study is to document the utility of PEx repair in improving health and quality of life and to test the prevailing belief that the two predominant surgical procedures currently in use for PEx repair are essentially equivalent in terms of long-term outcomes. We believe the uncertainty about the impact of PEx on cardiopulmonary function is due to part to the fact that the previous studies have not measured the physiological parameters mostly likely affected by the defect. A protocol to test this was developed. Thus, we propose to use these measures as well as conventional output of progressive exercise test to examine cardiopulmonary function before and after surgical repair of PEx within the context of the original study.
NCT00289302
Heart failure is a progressive disease that decreases the pumping action of the heart. This may cause a backup of fluid in the heart and may result in heart beat changes. When there are changes in the heart beat sometimes an implantable heart device is used to control the rate and rhythm of the heart beat. In certain heart failure cases, when the two lower chambers of the heart no longer beat in a coordinated manner, cardiac resynchronization therapy (CRT) may be prescribed. CRT is similar to a pacemaker. It is placed (implanted) under the skin of the upper chest. CRT is delivered as tiny electrical pulses to the right and left ventricles through three or four leads (soft insulated wires) that are inserted through the veins to the heart. People who have a dangerously fast heart beat, or whose heart is at risk of stopping beating, may be in need of an electronic device called an implantable cardioverter defibrillator (ICD). An ICD is implanted surgically just under the skin in the upper chest area and it sends a strong electrical impulse, or shock, to the heart to return it to a normal rhythm. If the heart is beating too slowly or at an abnormal rhythm, an ICD can also pace the heart to return the heart to its normal rhythm. The InSync ICD device can change the timing of when the left and right ventricles of the heart are paced to beat. The purpose of this study is to monitor the long-term performance of the InSync ICD Model 7272 and the InSync Marquis 7277 systems for cardiac resynchronization therapy (CRT).