ACC - Atrial Contribution to CRT
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Dilated Cardiomyopathy
- Sponsor
- Boston Scientific Corporation
- Enrollment
- 43
- Locations
- 1
- Primary Endpoint
- Optimal AV-Delay (AVD)
- Status
- Completed
- Last Updated
- 5 years ago
Overview
Brief Summary
This prospective study will evaluate in patients, fulfilling implant criteria for Cardiac Resynchronisation Therapy (CRT) implant, the optimal atrial contribution to the resynchronised ventricles in the event of right atrial pacing.
Detailed Description
All patients will undergo advanced echocardiographic examination pre-operative, pre-discharge after implantation and at 3 and 6-months follow-up. AV-delay optimization will be performed using aortic VTI measured by continuous wave Doppler in a modified 4-chamber view. During optimisation aortic VTI will be measured at different heart rates reached by increasing atrial pacing 10, 20 and 30 beats above intrinsic heart rate (IHR).
Investigators
Eligibility Criteria
Inclusion Criteria
- •Symptoms of heart failure
- •Left ventricular dysfunction
- •Ventricular dyssynchrony
- •18 years or of legal age in order to give informed consent according to national laws
- •Able to understand the nature of the procedure
- •Available for follow-up on a regular basis at an approved investigational center
Exclusion Criteria
- •Atrial Fibrillation
- •Life expectancy of less than six months due to other medical conditions
- •For women: pregnancy or absence of medically accepted birth control
- •Inability or refusal to sign the Patient Informed Consent
- •Inability or refusal to comply with the follow up schedule or protocol requirements
- •Inability to undergo device implant, including general anaesthesia if required
- •Mechanical tricuspid prosthesis
- •Currently enrolled in another investigational study, including drug investigations
- •Hypertrophic Obstructive Cardiomyopathy (HOCM)
- •Not meeting the inclusion criteria
Outcomes
Primary Outcomes
Optimal AV-Delay (AVD)
Time Frame: Implant (baseline), 3 months and 6 months Follow-up
Optimal AV-Delay will be measured at implant (baseline ), 3months and 6 months Follow-up for intrinsic heart rate, and 10, 20 and 30 Bpm above intrinsic heart rate.
Aortic Velocity Time Integral (VTI)
Time Frame: At implant (baseline), 3 months and 6 months Follow-up
Velocity time integral of the aortic flow correlates with cardiac output and is an accepted parameter for optimization of Cardiac Resynchronization Therapy (CRT).
Secondary Outcomes
- 6 Minute Walk Test(implant (baseline), 3 months and 6 months Follow-up)
- Left Ventricular Ejection Fraction (LVEF)(implant (baseline), 3 Months, 6 Months)