- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02693262
Comparing Rate Response With CLS Versus Accelerometer ICD Settings in Heart Failure Patients With BIOTRONIK CRT-Ds (CLASS)
Rate Response With CLS Versus Accelerometer and Effect on Both Subjective Symptoms and Objective Outcomes in a Heart Failure Population Implanted With Cardiac Resynchronization With Defibrillator Device: The CLASS Trial
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
This study is a prospective, randomized, single-blind crossover study intended to enroll patients who are implanted or are scheduled to be implanted with a Biotronik CLS and accelerometer capable CRT-D device. Patients will serve as their own control group with regard to modes of rate-adaptive pacing. Patients with a previously implanted Biotronik CRT-D device with CLS-capability will be recruited from health care institutions in San Diego and all dedicated functional testing will be performed at the University of California, San Diego (UCSD). The goal enrollment target for analysis will be 15 patients, with up to 20 patients enrolled to allow for withdrawals.
The purpose of this study is to evaluate whether changes to an implanted ICD can improve the functional status of patients with suspected chronotropic incompetence (CI). CI is a condition in which the heart rate is unable to adequately respond to meet the patient's physical demands, such as walking, climbing stairs, or doing household chores. CI is common in patients with cardiovascular disease, particularly in patients with heart failure. Common clinical management of patients with suspected CI is to activate an accelerometer setting in the cardiac resynchronization therapy with defibrillator (CRT-D) device. An accelerometer will adjust the heart rate to fit the physiological circumstances and needs of the patient based on patient movement only. BIOTRONIK is a company that has developed a novel technology included in the settings for CRT-D devices that offers CLS as an alternative to a standard accelerometer. CLS utilizes sensed electrical properties of the heart in order to assess what may be the best heart rate for both physical and mental demands. This study is designed to compare whether patients will benefit from CLS when compared with standard accelerometer technology.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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California
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La Jolla, California, United States, 92037
- Sulpizio Cardiovascular Center
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Patients with a BIOTRONIK CRT-D device (capable of CLS and accelerometer rate responsive pacing)
- Patients at least 18 years old
- Patients who have plausible symptoms of CI based on previous monitoring and clinical symptoms
Exclusion Criteria:
- Pregnant patients
- Patients who are unwilling/unable to provide informed consent
- Patients who are unable to complete study related procedures
- Current persistent atrial fibrillation
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: CLS Mode on Biotronik CRT-D
All 15 patients will be randomized to this group.
Their device will be set in the CLS mode for 1 week.
|
Setting changed and monitored.
Quality of life evaluated through CPET, 6 Minute Walk Test, and Rand 36 Questionnaire.
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Active Comparator: Accelerometer Mode on Biotronik CRT-D
All 15 patients will be randomized to this group.
Their device will be set in the accelerometer rate responsive mode for 1 week.
|
Setting changed and monitored.
Quality of life evaluated through CPET, 6 Minute Walk Test, and Rand 36 Questionnaire.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Six-minute Walk Distance (6MWD) Test
Time Frame: Measured on day 14 and day 21.
|
Cardiovascular health benefits were measured by the six-minute walk distance (6MWD) test. The 6MWD is a standardized field test to evaluate functional exercise performance. Subjects are instructed to walk as far as possible in 6 min on a flat surface. This test was performed twice, once at the end of each intervention period. |
Measured on day 14 and day 21.
|
RAND-36 Questionnaire
Time Frame: Performed on day 14 and day 21.
|
Quality of life of subjects was measured by the RAND-36 which is a generic 36-item questionnaire that measures eight health-related domains stratified by physical health (physical functioning, role limitations due to physical health, pain, and general health) and emotional health (vitality, role limitations due to emotional problems, social functioning, and mental health). Each scale is directly transformed into a 0-100 scale for a total score range of 0-800. Higher scores represent a more favorable health status. This test was performed twice, once at the end of each intervention period. |
Performed on day 14 and day 21.
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Cardiopulmonary Exercise Testing (CPET)
Time Frame: Performed on day 14 and day 21.
|
Cardiovascular health benefits were determined by measuring the peak heart rate (HR) during Cardiopulmonary exercise testing (CPET). The CPET is performed on a standard treadmill according to the Naughton protocol. During the test, patients inspired room air through a low-resistance mask, and expired oxygen and carbon dioxide partial pressures were measured with a gas analyzer. HR was recorded every 30 seconds during exercise. All patients were encouraged to exercise to maximal effort. This test was performed twice, once at the end of each intervention period. |
Performed on day 14 and day 21.
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Patient Preference
Time Frame: Performed on day 21.
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At the end of the study, patients were asked about personal preference regarding CLS over DDDR.
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Performed on day 21.
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Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: Jonathan Hsu, MD, University of California, San Diego
Publications and helpful links
General Publications
- Alt E. What is the ideal rate-adaptive sensor for patients with implantable cardioverter defibrillators: lessons from cardiac pacing. Am J Cardiol. 1999 Mar 11;83(5B):17D-23D. doi: 10.1016/s0002-9149(98)01038-8.
- Epstein AE, DiMarco JP, Ellenbogen KA, Estes NA 3rd, Freedman RA, Gettes LS, Gillinov AM, Gregoratos G, Hammill SC, Hayes DL, Hlatky MA, Newby LK, Page RL, Schoenfeld MH, Silka MJ, Stevenson LW, Sweeney MO, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Buller CE, Creager MA, Ettinger SM, Faxon DP, Halperin JL, Hiratzka LF, Hunt SA, Krumholz HM, Kushner FG, Lytle BW, Nishimura RA, Ornato JP, Page RL, Riegel B, Tarkington LG, Yancy CW; American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the ACC/AHA/NASPE 2002 Guideline Update for Implantation of Cardiac Pacemakers and Antiarrhythmia Devices); American Association for Thoracic Surgery; Society of Thoracic Surgeons. ACC/AHA/HRS 2008 Guidelines for Device-Based Therapy of Cardiac Rhythm Abnormalities: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the ACC/AHA/NASPE 2002 Guideline Update for Implantation of Cardiac Pacemakers and Antiarrhythmia Devices): developed in collaboration with the American Association for Thoracic Surgery and Society of Thoracic Surgeons. Circulation. 2008 May 27;117(21):e350-408. doi: 10.1161/CIRCUALTIONAHA.108.189742. Epub 2008 May 15. No abstract available. Erratum In: Circulation.2009 Aug 4; 120(5):e34-5.
- Freedman RA, Hopper DL, Mah J, Hummel J, Wilkoff BL. Assessment of pacemaker chronotropic response: implementation of the Wilkoff mathematical model. Pacing Clin Electrophysiol. 2001 Dec;24(12):1748-54. doi: 10.1046/j.1460-9592.2001.01748.x.
- Maass AH, Buck S, Nieuwland W, Brugemann J, van Veldhuisen DJ, Van Gelder IC. Importance of heart rate during exercise for response to cardiac resynchronization therapy. J Cardiovasc Electrophysiol. 2009 Jul;20(7):773-80. doi: 10.1111/j.1540-8167.2008.01422.x. Epub 2009 Feb 2.
- Coenen M, Malinowski K, Spitzer W, Schuchert A, Schmitz D, Anelli-Monti M, Maier SK, Estlinbaum W, Bauer A, Muehling H, Kalscheur F, Puerner K, Boergel J, Osswald S. Closed loop stimulation and accelerometer-based rate adaptation: results of the PROVIDE study. Europace. 2008 Mar;10(3):327-33. doi: 10.1093/europace/eun024. Epub 2008 Feb 13.
- Tse HF, Siu CW, Lee KL, Fan K, Chan HW, Tang MO, Tsang V, Lee SW, Lau CP. The incremental benefit of rate-adaptive pacing on exercise performance during cardiac resynchronization therapy. J Am Coll Cardiol. 2005 Dec 20;46(12):2292-7. doi: 10.1016/j.jacc.2005.02.097.
- Keteyian SJ, Isaac D, Thadani U, Roy BA, Bensimhon DR, McKelvie R, Russell SD, Hellkamp AS, Kraus WE; HF-ACTION Investigators. Safety of symptom-limited cardiopulmonary exercise testing in patients with chronic heart failure due to severe left ventricular systolic dysfunction. Am Heart J. 2009 Oct;158(4 Suppl):S72-7. doi: 10.1016/j.ahj.2009.07.014.
- Hsu JC, Darden D, Alegre M, Birgersdotter-Green U, Feld GK, Hoffmayer KS, Han F, Krummen D, Raissi F, Ho G, Taub PR, Urey MA, Adler E. Effect of closed loop stimulation versus accelerometer on outcomes with cardiac resynchronization therapy: the CLASS trial. J Interv Card Electrophysiol. 2021 Sep;61(3):479-485. doi: 10.1007/s10840-020-00829-4. Epub 2020 Aug 5.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 151774
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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