Assessment of Metabolic Function and Perfusion Using Positron Emission Tomography: An Analysis of Patients With Congestive Cardiomyopathy Before and After Beta-Blockers
PET scan
Laminopathies+6
+ Cardiovascular Diseases
+ Heart Diseases
Treatment Study
Summary
Study start date: January 1, 1994
Actual date on which the first participant was enrolled.Deterioration in left ventricular function, which is characteristic in patients with congestive heart failure, appears to be a multifactorial process. Beta-blockers appear to reverse the deterioration and frequently improve left ventricular function in patients with both ischemic and non-ischemic cardiomyopathies. The mechanism by which beta-blockers improve ejection fraction is not known. Although it is well established that regional flow, function and metabolism may improve after coronary revascularization whether beta-blocker therapy will have similar salutary results in patients with congestive heart failure is unknown. The aim of this study is to: 1) quantitate regional glucose uptake and regional blood flow before and after chronic beta-blocker administration to patients with congestive heart failure using positron emission tomography, 2) determine if alteration in either regional glucose or lipid uptake or regional blood flow correlate with improvement in wall motion and global left ventricular function, and 3) determine if ischemic and nonischemic myocardium differ in blood flow or metabolism.
Protocol
This section provides details of the study plan, including how the study is designed and what the study is measuring.130 patients to be enrolled
Total number of participants that the clinical trial aims to recruit.Treatment Study
Eligibility
Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.Any sex
Biological sex of participants that are eligible to enroll.Healthy volunteers not allowed
If individuals who are healthy and do not have the condition being studied can participate.Conditions
Pathology
Criteria
Left ventricular ejection fraction by radionuclide angiography of less than or equal to 40%. New York Heart Association class II, III or IV symptoms on standard heart failure medications which my include digoxin, diuretics and angiotensin converting enzyme inhibitors for at least one month prior to enrollment. Ischemic cardiomyopathy if enzymes document an MI or 70% or greater stenosis in one major vessel. Dilated cardiomyopathy-if no coronary disease. No pregnant or lactating women. No women of child-bearing age not on proven birth control. No severe hepatic or renal disease. No diabetes mellitus or fasting glucose greater than or equal to 120 mg/dl. No primary valvular heart disease. No PTCA or CABG within 3 months of enrollment. No history of myocardial infarction or unstable angina within past 2 months. No resting heart rate less than 60 bpm. No A-V block greater than 1 degree block without pacemaker. No severe ETOH abuse within 6 months of enrollment. No severe bronchospasm.
Study Centers
These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.This study has 1 location
National Heart, Lung and Blood Institute (NHLBI)
Bethesda, United StatesOpen National Heart, Lung and Blood Institute (NHLBI) in Google Maps