Insertable Cardiac Monitor for Primary Atrial Fibrillation Detection in High-Risk Heart Failure Patients
- Conditions
- Atrial FibrillationHeart Failure
- Interventions
- Device: ASSERT Insertable Cardiac MonitorOther: Conventional Management and monitoring
- Registration Number
- NCT04818645
- Lead Sponsor
- University of Rochester
- Brief Summary
Patients with heart failure (HF) represent a large population of patients who are at high risk for complications related to undiagnosed atrial fibrillation (AF). However, currently there are limited modalities for early AF detection and subsequent stroke prevention in this high-risk population. An implantable cardiac monitor (ICM) is inserted subcutaneously and can provide long term arrhythmia information via remote monitoring.
The ASSERT-AF study seeks to accurately define the burden of AF and other arrhythmias in high-risk HF patients using an ASSERT ICM.
- Detailed Description
Over 6 million people in the United States suffer from heart failure (HF). By the year 2030 the prevalence of HF is expected to exceed 8 million people. Heart failure accounts for 1 million hospital admissions each year, costing our economy in excess of $30 billion dollars per year. Mortality in patients with HF remains high, and nearly half of all patients diagnosed with HF will die within 5 years. More than half of all patients admitted with HF decompensation have preserved left ventricular systolic function. Patients with HF and mildly reduced or preserved left ventricular systolic function are at high risk for developing atrial fibrillation (AF), the occurrence of which often contributes to HF decompensation and increases morbidity and all-cause mortality. Similarly, patients with AF are at high risk for developing HF due to loss of atrio-ventricular synchrony and rapid uncontrolled ventricular rates. Detection of AF can be challenging and may go undiagnosed in asymptomatic or minimally symptomatic patients through conventional monitoring methods. Patients with HF represent a large population who are at risk for complications related to undiagnosed AF. AF increases the risk of stroke five-fold and the risk of death nearly two-fold. Moreover, strokes related to AF are twice as likely to be fatal or severely disabling compared to strokes due to other causes, such as ischemic small vessel disease or atheromatous large vessel disease. Cardiac implantable electronic devices (CIEDs), can be used for the early detection of AF in asymptomatic or mildly symptomatic patients with HF. However, current guidelines provide an indication for prophylactic implantable cardioverter defibrillator (ICD) only in HF patients with left ventricular ejection fraction (LVEF) ≤ 35%, whereas there are limited data for device-based detection of AF in HF patients with more preserved LVEF.
Implantable cardiac monitors (ICM) are devices that can be injected into the subcutaneous tissue and can provide automatic electrocardiographic recordings of asymptomatic arrhythmias as well as patient triggered electrocardiographic recordings of symptomatic episodes during long term follow-up. Implantable cardiac monitors are be paired with remote monitoring systems, capable of rapid remote review of electrograms. Accordingly, we hypothesize that a management strategy that incorporates ICM implantation in patients with HF and LVEF \>35% will result in a significantly higher rate of AF detection leading to arrhythmia related interventions compared to conventional monitoring and follow-up in patients with HF.
Recruitment & Eligibility
- Status
- RECRUITING
- Sex
- All
- Target Recruitment
- 477
- Male and female patients more than 18 years of age (no upper age limit)
- HF exacerbation requiring initiation or augmentation of decongestive therapy in a hospital setting (hospitalization or emergency department visit) during the past 24 calendar months prior to consent date OR current treatment with loop-diuretics (furosemide, bumetanide, or torsemide).
- LVEF > 35% on a cardiac imaging study (echocardiogram, nuclear imaging, cardiac magnetic resonance imaging) performed during the past 24 calendar months prior to consent date
- One or more FDA-approved indications for an Abbott ICM (unexplained symptoms such as: dizziness, palpitations, chest pain, syncope, and shortness of breath, as well as patients who are at risk for cardiac arrhythmias).
- Willing to undergo an Abbott ICM implant and agree to remote ICM monitoring.
- Existing implantable cardioverter defibrillator (ICD), biventricular ICD, implantable cardiac monitor or pacemaker.
- Known or documented history AF or atrial flutter any time in past.
- Has had a heart transplant
- Participation in other clinical trials (observational registries are allowed with approval from the Coordination Center)
- Unable or unwilling to cooperate with the protocol
- Unable or unwilling to sign the consent for participation
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description ASSERT insertable cardiac monitor ASSERT Insertable Cardiac Monitor The ASSERT implantable cardiac monitor (ICM) is an FDA-approved device that can be injected into the subcutaneous tissue and can provide automatic as well as patient triggered electrocardiographic recordings of symptomatic episodes during long term follow-up. This Implantable cardiac monitor is paired with a remote monitoring smartphone application called My Merlin that capable of rapid remote review of electrograms to be utilized in this study for arrhythmia detection. The ASSERT ICM is indicated for the monitoring and diagnostic evaluation of patients who experience unexplained symptoms such as: dizziness, palpitations, chest pain, syncope, and shortness of breath, as well as patients who are at risk for cardiac arrhythmias. It is also indicated for patients who have been previously diagnosed with atrial fibrillation or who are susceptible to developing atrial fibrillation. Conventional Management Conventional Management and monitoring The conventional management arm will use arrhythmia signs and symptoms to determine occurrence of arrhythmias.
- Primary Outcome Measures
Name Time Method Median Time to first detection of AF lasting > 5 minutes 24 months Defined as ICM detected AF in the intervention (implantable cardiac monitor) arm or captured by clinical symptoms and documented by ECG or Holter in the conventional arm.
- Secondary Outcome Measures
Name Time Method Time to detection of composite of arrhythmic events endpoint 24 months Arrhythmic events consisting of AF, sustained ventricular tachycardia, and high-risk bradyarrhythmias (high degree AV block or sinus pause \> 5 seconds), whichever occurs first.
Mean percentage of time spent in atrial fibrillation (AF Burden) 24 months AF burden, defined as average percentage of time spent in AF (i.e. amount of time spent in AF divided by the total amount of time a patient was monitored). AF burden will be quantified only in the intervention arm.
Time to initiation of guideline directed anti-arrhythmic and HF interventions 24 months Interventions such AF ablation, initiation of antiarrhythmic, anticoagulation, beta-blocker therapy and others.
Number cardiovascular hospitalizations or death 24 months Total number of cardiovascular hospitalizations or death in each arm.
Compare healthcare utilization using Abbott ICM vs. non-ICM monitoring. 24 months Including emergency department visits, unplanned office visits, cardiovascular hospitalization or death
Mean quality of life measured using the Kansas City Cardiomyopathy Questionnaire (KCCQ) 24 months All KCCQ scores are scaled from 0 to 100 and frequently summarized in 25-point ranges, where scores represent health status as follows: 0 to 24: very poor to poor; 25 to 49: poor to fair; 50 to 74: fair to good; and 75 to 100: good to excellent.
Trial Locations
- Locations (1)
University of Rochester Medical Center
🇺🇸Rochester, New York, United States