Exclusion Criteria
PTCA, cardiomyoplasty, myocardium infarction, instable angina pectoris or cerebral insult within 6 weeks before the planned cardiac resynchronization therapy
boolean
pulmonary hypertension/Eisenmenger syndrome
boolean
univentricular heart without Fontan procedure
boolean
life expectancy less than 1 year due to a non-cardiac disease
boolean
expected poor compliance of the patient, e.g. Trisomic 21 or other mental retardation
boolean
ergospirometry cannot be performed
boolean
pregnancy
boolean
participation in a clinical trial within the last 4 weeks or current participation in a clinical trial (except studies of the Competence Network for Congenital Heart Defects)
boolean
diseases or functional disorders that exclude participation according to physician's convenience
boolean
poor cooperation
boolean
known or continuous drug or alcohol abuse
boolean