OVATIO CRT and SITUS OTW LV Lead Post Approval Study

Inclusion Criteria: * NYHA Class III/IV * Stable medical regimen * QRS greater than or equal to 130 ms * LVEF less than or equal to 35% Exclusion Criteria: * VT of transient or reversible causes * Incessant VT * Currently implanted with a lead positioned through the coronary sinus (unless it is the SITUS OTW LV lead) * Cardiac revascularization or angioplasty within the last month * Heart failure due to correctable valve disease * Chronic, medially refractory AT * Enrolled in another clinical study that may confound the results of this study * Life expectancy less than 6 months * Inability to understand the purpose of the study or refusal to cooperate * Inability or refusal to provide informed consent * Unavailable for scheduled follow-up with the implanting practice * Sensitivity to 1 mg dexamethasone sodium phosphate * Less than 18 years of age * Pregnancy