N-of-1 Trials for Deprescribing Beta-blockers in HFpEF
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 入组人数
- 9
- 试验地点
- 1
- 主要终点
- Change in Physical Activity When on Beta-blocker Versus When Off Beta-blocker, as Measured by Step Count on Wearable Activity Monitoring Device
研究概览
简要总结
The purpose of this study is to understand the impact of beta-blockers on physical function in older adults with heart failure. We will achieve this objective by conducting N-of-1 trials. N-of-1 trials are personalized experiments that test different treatment options in an individual patient.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 65 Years 至 —（Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Ambulatory adults ≥65 years of age with Heart Failure with Preserved Ejection Fraction (HFpEF) according to ACC/AHA guidelines: (signs and symptoms of Heart failure [HF] and ejection fraction [EF] ≥50%)
- •Taking Beta blocker
排除标准
- •Alternate Causes of HFpEF Syndrome:
- •Severe valvular disease
- •Constrictive pericarditis
- •High output heart failure
- •Infiltrative cardiomyopathy
- •Other compelling indication for beta blocker
- •Prior EF < 50%
- •Hypertrophic cardiomyopathy
- •Angina symptoms
- •Acute coronary syndrome, myocardial infarction or coronary artery bypass surgery in prior 3 year
- •History of ventricular tachycardia
- •Atrial arrhythmia with hospitalization for rapid ventricular response, prior 1 year
- •Sinus tachycardia > 100 beats per minute (bpm), atrial arrhythmia with ventricular rate >90 bpm, systolic blood pressure > 160 mmHg
- •Clinical instability (N-of-1 trials are appropriate for stable conditions only)
- •Decompensated HF
- •Hospitalized in past 30 days
- •Medication changes or procedures in prior 14 days (to prevent confounding from other interventions), at PI discretion
- •Estimated life expectancy <6 months
- •Moderate-severe dementia or psychiatric disorder precluding informed consent
- •Any condition that, in Principal Investigator's opinion, makes the patient unsuitable for study participation
研究组 & 干预措施
Beta Blocker ABAB Sequence
This arm will follow an ABAB sequence. "A" representing ON beta blockers and "B" representing OFF beta blockers. Subjects in this arm will continue their home dose during the initial A period, they will then crossover into Period 2, where dose reduction will begin until they are off of beta blockers. After Period 2, the subjects have the option to decide if they want to be on or off their beta blocker and proceed with the Follow-Up Phase, or continue to Period 3 if they don't feel ready to make that decision to stay on or go off their beta blocker yet. During Period 3, they will restart beta-blockers, gradually uptitrating until reaching their home dose and finally during Period 4, we will again conduct a dose reduction until off of beta blockers.
干预措施: Beta blockers (Drug)
Beta Blocker BABA Sequence
This arm will follow a BABA sequence. "A" representing ON beta blockers and "B" representing OFF of beta blockers. Subjects in this arm will have their previously prescribed beta blocker dose reduced until they are completely off of beta blockers during Period 1. They will then crossover into Period 2, where uptitration will begin until they are back on their previously prescribed dose of beta blockers. After Period 2, the subjects have the option to decide if they want to be on or off their beta blocker and proceed with the Follow-Up Phase, or continue to Period 3 if they don't feel ready to make that decision to stay on or go off their beta blocker yet. During Period 3, we will again conduct a dose reduction, until the subject is off of beta blockers and finally during Period 4, we will uptitrate them back to their home dose of beta blockers.
干预措施: Beta blockers (Drug)
结局指标
主要结局
Change in Physical Activity When on Beta-blocker Versus When Off Beta-blocker, as Measured by Step Count on Wearable Activity Monitoring Device
时间窗: The maximum amount of time a subject could have been assessed for this outcome measure is 8-weeks (last 2 weeks of each period for up to 4 periods).
The wearable activity monitoring device measures daily step count. Due to the nature of N-of-1 trials, the duration of a subject's periods varies based on the subject's "home" dose of beta-blocker prior to enrollment, therefore, each subject's respective time period for the OFF and ON periods could range between 3 and 6 weeks. We will compare average step counts over 2-week periods, which will be the final 2 weeks of each period when subjects are either on their "home" (ON Beta Blockers) or minimally tolerated (OFF Beta Blockers) dose. The outcome measure data is the mean collected during the outcome measure time frame.
Change in Lower Extremity Function When on Beta-blocker Versus When Off Beta-blocker, as Measured by the Balance Portion of a Modified Version of the Short Physical Performance Battery.
时间窗: The maximum amount of time a subject could have been assessed for this outcome measure is 24-weeks. This outcome was measured at baseline and at each end of period visit.
The Short Physical Performance Battery assesses gait speed, core strength when rising from a chair without using the upper extremities, and balance while standing without a cane or walker. The balance test portion of the SPPB assesses the subject's ability to stand unassisted without the use of a cane or walker. Balance test scores range from 0 - 4 with higher scores indicating better ability to stand unassisted. Our research team conducted the balance test according to SPPB standards. Due to the nature of N-of-1 trials, the duration of a subject's period varies based on the subject's "home" dose of beta-blocker prior to enrollment, therefore, each subject's respective time period for the OFF and ON periods could range between 3 - 6 weeks. The outcome measure data is the mean of the data collected during the span of the outcome measure time frame.
Change in Lower Extremity Function When on Beta-blocker Versus When Off Beta-blocker, as Measured by the Gait Speed Portion of a Modified Version of the Short Physical Performance Battery.
时间窗: The maximum amount of time a subject could have been assessed for this outcome measure is 24-weeks. This outcome was measured at baseline and at each end of period visit.
The Short Physical Performance Battery assesses gait speed, core strength when rising from a chair without using the upper extremities, and balance while standing without a cane or walker. The gait speed portion of the SPPB assesses the subject's lower extremity function. When comparing the number of seconds it takes to complete the 4-meter gait speed test, quicker speeds indicate better lower extremity function. Our research team conducted the 4-meter gait speed test according to SPPB standards, but have chosen on comparing the speed at which subjects were able to complete the test. Due to the nature of N-of-1 trials, the duration of a subject's period varies based on the subject's "home" dose of beta-blocker prior to enrollment, therefore, each subject's respective time period for the OFF and ON periods could range between 3 - 6 weeks. The outcome measure data is the mean of the data collected during the span of the outcome measure time frame.
Change in Lower Extremity Function When on Beta-blocker Versus When Off Beta-blocker, as Measured by the Chair Rise Portion of a Modified Version of the Short Physical Performance Battery.
时间窗: The maximum amount of time a subject could have been assessed for this outcome measure is 24-weeks. This outcome was measured at baseline and at each end of period visit.
The Short Physical Performance Battery assesses gait speed, core strength when rising from a chair without using the upper extremities, and balance while standing without a cane or walker. The chair rise portion of the SPPB assesses core strength. When comparing the number of seconds it takes to complete 5 chair rises, quicker speeds indicate better core strength. Our research team has chosen on comparing the speed at which subjects were able to complete the test. Due to the nature of N-of-1 trials, the duration of a subject's period varies based on the subject's "home" dose of beta-blocker prior to enrollment, therefore, each subject's respective time period for the OFF and ON periods could range between 3 - 6 weeks. The outcome measure data is the mean of the data collected during the outcome measure time frame.
Change in Exercise Capacity When on Beta-blocker Versus When Off Beta-blocker, as Measured by Peak Oxygen Consumption (VO2) During Cardiopulmonary Exercise Test (CPET)
时间窗: The maximum amount of time a subject could have been assessed for this outcome measure is 6-weeks. This outcome was measured at the end of the first and second visit.
Cardiopulmonary exercise testing (CPET) measures breath-by-breath oxygen production during symptom-limited exercise on a stationary bike. This permits the calculation of peak oxygen consumption (VO2). Percent predicted peak VO2 for body weight will also be calculated. Due to the nature of N-of-1 trials, the duration of a subject's period varies based on the subject's "home" dose of beta-blocker prior to enrollment, therefore, each subject's respective time period for the OFF and ON periods could range between 3 - 6 weeks. The outcome measure data is the mean of the data collected during the span of the outcome measure time frame.
次要结局
- Change in Patient-reported Quality of Life When on Beta-blocker Versus When Off Beta-blocker, as Measured by Patient-Reported Outcome Measurement Information System-29 (PROMIS-29)(The maximum amount of time a subject could have been assessed for this measure is 76-weeks (24-week max intervention phase,1-year follow-up phase). This outcome was measured at baseline, weekly, end of period and intervention visits, and during follow-up.)
- Change in Patient-reported Health Status When on Beta-blocker Versus When Off Beta-blocker, as Measured by Kansas City Cardiomyopathy Questionnaire (KCCQ-12)(The max amount of time a subject could have been assessed for this measure is 76-weeks (24-week max intervention phase,1-year follow-up phase). This outcome was measured at baseline, bi-weekly, end of period and intervention visits, and during follow-up.)
- Change in Patient-reported Sexual Function When on Beta-blocker Versus When Off Beta-blocker, as Measured by Patient-Reported Outcome Measurement Information System-Sexual Function (PROMIS-Sexual Function)(The maximum amount of time a subject could have been assessed for this measure is 76-weeks (24-week max intervention phase,1-year follow-up phase). This outcome was measured at baseline, end of period and intervention visits, and during follow-up.)
- Change in Patient-reported Health When on Beta-blocker Versus When Off Beta-blocker, as Measured by the EuroQol-5D Visual Analogue System (EQ-5D VAS)(The maximum amount of time a subject could have been assessed for this outcome measure is 24-weeks. This outcome was measured at baseline and at each end of period visit.)
- Change in Patient-reported Cognitive Function When on Beta-blocker Versus When Off Beta-blocker, as Measured by Patient-Reported Outcome Measurement Information System-Short Form 6a (PROMIS SF-6a)(The maximum amount of time a subject could have been assessed for this measure is 76-weeks (24-week max intervention phase,1-year follow-up phase). This outcome was measured at baseline, weekly, end of period and intervention visits, and during follow-up.)