Continued Access Clinical Trial of the SonRtip Lead and Automatic AV-VV Optimization Algorithm in the PARADYM RF SonR CRT-D (RESPOND-CAS)

Continued Access Clinical Trial of the SonRtip Lead and Automatic AV-VV Optimization Algorithm in the Paradym RF SonR CRT-D

The objective of the Continued Access study is to gather confirmatory evidence on the safety of the SonRtip lead and performance of the automatic atrioventricular (AV) delay and interventricular (VV) delay optimization algorithm used in the PARADYM RF SONR Cardiac Resynchronization Therapy with Defibrillation (CRT-D) device (Model 9770) in a patient population that is reflective of current heart failure treatment practice.

Study Overview

• Status: Unknown
• Conditions: Heart Failure (NYHA Class III and Ambulatory IV)
• Intervention / Treatment: Device: SonR automatic optimization feature turned ON ("AV+VV").

Detailed Description

Since the introduction of cardiac resynchronization therapy (CRT) on a large scale, it has been observed that approximately 30% of recipient patients are non-responsive to therapy. This non-responsiveness can be decreased by optimizing the device programming, particularly the stimulation rate, paced and sensed atrioventricular (AV) delay, and the interventricular (VV) delay.

All CRT patients need a 100% rate of ventricular capture, but beyond this the achievement of therapy effectiveness requires the identification of the optimal pacing configuration, which varies among patients. The optimization of CRT systems, usually based on ultrasound imaging is time-consuming and the number of patients in need of multiple optimization procedures due to ventricular remodeling is growing rapidly.

The mechanical effects of a more coordinated contraction result in a shortening of the isovolumetric contraction phase and the pre-ejection time, and an increase in LV dP/dt (change in left ventricular pressure over time. The concept of measuring contractility with an implantable accelerometer was first clinically validated through a multicenter study on a rate responsive pacing system (BEST - Living from SORIN Biomedica) in 1996. This study positively demonstrates that measurement of Peak Endocardial Acceleration signal (called PEA or SonR) is feasible and reliable in the long-term, both for the purpose of rate response and as a hemodynamic monitor of cardiac function.

More recent clinical studies have demonstrated that optimal VV and AV Delays determined using algorithms based on SonR signal analysis (SonR method) are correlated with the highest hemodynamic improvement and lead to significant clinical benefit for the patients, thus reducing the rate of non-responsiveness to CRT therapy.

Therefore, frequent and automatic AV and VV delay optimization in patients with CRT-D devices could benefit both patients, through increasing the percent of CRT responders, and clinicians, through simplifying CRT optimization.

The inclusion phase of the "Clinical Trial of the SonRtip Lead and Automatic AV-VV Optimization Algorithm in the PARADYM RF SonR CRT-D" (RESPOND CRT Study, code ITSY06) has been completed. A total of 1039 patients have been enrolled in 125 centers in Europe, Australia and USA, from 13 January 2012 to 14 October 2014.

Safety has been monitored continuously throughout the RESPOND-CRT trial by the Data Safety Monitoring Board (DSMB). The DSMB charter is to provide recommendations to the Sponsor to suspend or stop the study if there is clear evidence of harm or harmful side-effects related to the use of the device or study procedures. To date, there have been no safety concerns raised by the RESPOND-CRT study data and the DSMB has recommended continuation of the clinical study.

Additionally, safety is supported by the European marketing history. As the SonR System is CE marked, RESPONDCRT is being conducted as a post-market study in Europe. Therefore in addition to the 1000+ patients enrolled in the RESPOND-CRT IDE, an additional 3000+ patients have received the SonR system outside the study.

As a supplement to the RESPOND CRT IDE Study a Continued Access Study (CAS) is being conducted according to the potential public health need and preliminary evidence that the device is likely to be effective with no significant safety concerns for the proposed indication.

• Study Type: Interventional
• Enrollment (Actual): 49
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Ohio
    • Cleveland, Ohio, United States, 44106
      • University Hospitals of Cleveland

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Patients who meet all the following criteria at the time of enrollment may be included:

  1. Patient with a class I and IIa indication for implantation of a CRT-D device according to current available guidelines
  2. Moderate/Severe HF (NYHA Class III or ambulatory IV)
  3. LVEF ≤ 35 %
  4. LBBB: QRS ≥ 120 ms ; non-LBBB : QRS ≥ 150 ms
  5. On a stable optimal drug regimen
  6. Patient is in sinus rhythm at the time of signing the informed consent
  7. Signed and dated informed consent

Exclusion Criteria:

• Patients who meet any one of these criteria will be excluded from the investigation:

  1. Ventricular tachyarrhythmia of transient or reversible causes such as acute myocardial infarction, digitalis intoxication, drowning, electrocution, electrolyte imbalance, hypoxia or sepsis, uncorrected at the time of the enrollment
  2. Incessant ventricular tachyarrhythmia
  3. Unstable angina, or MI, CABG, or PTCA within the past 4 weeks
  4. Correctable valvular disease that is the primary cause of heart failure
  5. Recent CVA or TIA (within the previous 3 months)
  6. Persistent or permanent atrial arrhythmias (or cardioversion for atrial fibrillation) within the past month**
  7. Post heart transplant (patients who are waiting for a heart transplant are allowed in the study)
  8. Renal failure (GFR<15 ml/min/1.73m2) or on dialysis
  9. Previous implant with a CRT- P or CRT-D device
  10. Concurrent implant with another pacemaker or ICD system in which all or some of the components will not be extracted and/or utilized in the new system. Previously implanted RA leads must be removed prior to implant of the SonRtip lead.
  11. Already included in another clinical study that could confound the results of this study
  12. Life expectancy less than 1 year
  13. Inability to understand the purpose of the study or to understand and complete the QOL questionnaire
  14. Unavailability for scheduled follow-up or refusal to cooperate
  15. Sensitivity to 1 mg Dexamethasone sodium phosphate (DSP)
  16. Age of less than 18 years
  17. Pregnancy
  18. Substance addiction or abuse
  19. Under guardianship

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Treatment; This is a single-arm trial. All patients will be implanted with the PARADYM RF SONR CRT-D device and the SonRtip bipolar atrial lead. After successful implant, all patients will be programmed with the SonR automatic optimization feature turned ON ("AV+VV").	Device: SonR automatic optimization feature turned ON ("AV+VV").

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Acute SonRtip Lead Complication-Free Rate	All patients implanted with the SonRtip lead	Month 3
Chronic SonRtip Lead Complication-Free Rate	All patients implanted with the SonRtip lead	From month 3 to month 12
SonRtip Lead, pacing threshold	All patients implanted with the SonRtip lead	12 months
SonRtip Lead, sensing amplitude	All patients implanted with the SonRtip lead	12 months
SonRtip Lead, pacing impedance	All patients implanted with the SonRtip lead	12 months
Report deaths from any cause	All patients enrolled	12 months
Report HF-related events	All patients implanted with the entire system	12 months
Report Quality of Life improvement	All patients implanted with the entire system	12 months
Report NYHA class improvement	All patients implanted with the entire system	12 months
Report echocardiographic parameters trend	All patients implanted with the entire system	Month 12
Report Adverse Events	All patients enrolled	12 months

Collaborators and Investigators

• Sponsor: MicroPort CRM
• Collaborators: Sorin CRM
• Investigators: Principal Investigator: Jagmeet P. Singh, M.D., Massachusetts General Hospital

Study record dates

Study Major Dates

• Study Start: April 1, 2015
• Primary Completion (Anticipated): April 1, 2019
• Study Completion (Anticipated): December 1, 2019

Study Registration Dates

• First Submitted: February 23, 2015
• First Submitted That Met QC Criteria: February 23, 2015
• First Posted (Estimate): March 2, 2015

Study Record Updates

• Last Update Posted (Actual): January 11, 2019
• Last Update Submitted That Met QC Criteria: January 9, 2019
• Last Verified: January 1, 2019

More Information

Terms related to this study

• Keywords: Heart Failure; Sinus rhythm; CRT-D device; Severe HF (NYHA Class III or ambulatory IV); Stable, optimal drug regimen
• Additional Relevant MeSH Terms: Heart Diseases; Cardiovascular Diseases; Heart Failure
• Other Study ID Numbers: ITSY10

Drug and device information, study documents

• Studies a U.S. FDA-regulated device product: Yes