PROSPECT: Predictors of Response to Cardiac Re-Synchronization Therapy
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government.
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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. Using a medical device like a pacemaker or a defibrillator can help the heart to pump in regular beats. However, not all patients do better with a device. Currently, there is not a way to identify which patients will benefit from the device. The purpose of this study is to determine if using medical tests, Echocardiogram, can help in predicting which patients will improve. The types of patients needed for this study are those who have been diagnosed with moderate or severe heart failure.
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Ages Eligible for Study:
18 Years and older (Adult, Senior)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Moderate to severe heart failure
Ejection Fraction ( measurement of blood pumped out of the heart) less than 35%
Wide (greater than 130 milliseconds) QRS duration for US patients only.
May include patients with less than 130 millisecond QRS duration if they have mechanical dyssynochrony (uncoordinated heart contractions) in Europe.
All patients enrolled should be stable on medications that include at least an ACE inhibitor or Angiotensin Receptor Blocker (ARB) and at optimal level for at least one month prior to surgery
Patients that are not eligible for this study are those that have a mechanical right heart valve or are experiencing the following medical conditions within the last 3 months:
Chest pain / unstable angina
Acute heart attack
Chronic or permanent atrial arrhythmias such as atrial fibrillation