Heart Failure and Sudden Cardiac Death Japan Registry

General Inclusion Criteria:

1. Subject is aged 20 or above
2. Subject is willing and capable of providing informed consent
3. Subject is willing and capable of participating in all visits associated with thisstudy at an approved clinical study site and at the intervals defined by this ClinicalInvestigation Plan (CIP)
4. Measured Ejection fraction value obtained by echocardiography or equivalent method asStandard of Care (SOC):

• Device cohorts: within the last 3 months prior to enrolment
• Non-device cohort: latest available within the last 12 months prior to enrollmentin case there was no documented HF decompensation, myocardial infarction (MI) orrevascularization, otherwise within the last 3 months prior to enrollment And 12 lead electrocardiogram (ECG) recording available as SOC:
• Device cohorts: pre-implant ECG maximum 45 days before implant; post-implant ECG
• Non-device cohort: latest available maximum 12 months prior to enrollment and subjectagrees in the data being used for this study

General Exclusion Criteria:

1. Subject is enrolled in any other concurrent study without prior written approval fromBoston Scientific (BSC), with the exception of local mandatory governmental registriesand observational studies/registries that are not in conflict and do not affect thefollowing:

• Schedule of procedures for the HINODE Study (i.e. should not cause additional ormissed visits)
• HINODE Study outcome
• Conduct of the HINODE Study per Good Clinical Practice /International StandardOrganization 14155:2011/local regulations as applicable

2. Device implant revision is scheduled due to unstable result of an implant <45 daysprior enrolment
3. Subjects with more than 5 of the following risk factors: LVEF <35%, NYHA Class III orIV, left bundle branch block (LBBB) with QRS > 130 ms or QRS ≥150 ms, renaldysfunction (chronically BUN >26 mg/dL / ≥9.28 mmol/L), diabetes type I and II,chronic atrial fibrillation (permanent or persistent according to ESC Guideline 2016),prior MI, age >70 years, smoking today or during last 5 years
4. Subjects with chronic renal disease with chronic BUN ≥50mg/dL or creatinine ≥2.5 mg/dL
5. Subjects with coronary artery bypass graft (CABG) surgery or percutaneous coronaryintervention (PCI) within the past three calendar months prior to enrollment
6. Subjects with enzyme-positive myocardial infarction within the past three calendarmonths prior to enrollment
7. Subjects who are expected to survive for <1 year with good functional status
8. Subject's physician does not allow participation
9. Subject is not willing and capable of participating in all testing or visitsassociated with this clinical study at an approved clinical study center and at theintervals defined by this CIP
10. Unwilling to sign the consent for participation
11. Women of childbearing potential who are or might be pregnant at the time of studyenrolment
12. ICD and CRT-D cohorts: implanted with a non-BSC device system. PM/CRT-P cohorts:implanted with a non-BSC pulse generator device. Additional eligibility criteria apply to each cohort