The EASYTRAK EPI Clinical Investigation

Inclusion Criteria: * Patients who meet the EASYTRAK EPI indications * Patients who are age 18 or above, or of legal age to give informed consent specific to state and national law * Patients who are willing and capable of providing informed consent, undergoing a device implant, participating in all testing associated with this clinical investigation at an approved clinical investigational center and at the intervals defined by this protocol * Patients who meet any one of the following three conditions: * Meet current indications for cardiac resynchronization therapy (CRT) and epicardial placement of a pace/sense lead on the left ventricle is preferred over an endocardial lead * Meet current indications for a cardiac pacing system and have documented evidence that an endocardial lead cannot be used * Meet current indications for a cardiac pacing system and a concurrent cardiac surgical procedure is taking place where no additional surgical procedures are required to provide access to the epicardial surface of the heart Exclusion Criteria: * Patients who meet the EASYTRAK EPI contraindications * Patients who have had a myocardial infarct, unstable angina, or percutaneous coronary intervention during the preceding 30 days prior to enrollment * Patients with a documented life expectancy of less than 6 months or expected to undergo heart transplant within the next 6 months * Patients enrolled in any concurrent study, without Guidant written approval, that may confound the results of this study * Women who are pregnant or plan to become pregnant