Overview
This prospective multicenter registry study aims to detect the serial changes in ventriculo-ventricular conduction times according to cardiac-resynchronization therapy response.
Eligibility
Inclusion Criteria:
- meeting the current ESC or ACCF/AHA/HRS Class I or Class IIa indications for cardiac-resynchronization (CRT) implant
Exclusion Criteria:
- Myocardial infarction, unstable angina within 40 days prior the enrollment
- Recent cardiac revascularization in the 4 weeks prior to the enrollment or planned for the 3 months following
- Cerebrovascular accident (CVA) or transient ischemic attack (TIA) in the 3 months prior to the enrollment
- Primary valvular disease requiring surgical correction
- Pregnant or are planning during the duration of the investigation
- Status 1 candidate for cardiac transplantation or consideration for transplantation over the next 12 months
- Post-cardiac transplantation
- Life expectancy < 12 months
- Currently participating in any other clinical investigation except for observational registry