The objective of the VOLT-AF study is to demonstrate that the Volt* PFA System (Volt PFA System) is safe and effective for the treatment of symptomatic, recurrent, drug refractory paroxysmal and persistent atrial fibrillation (AF).
ID
Source
Brief title
Condition
- Cardiac arrhythmias
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
1. Safety will be summarized as the rate of subjects experiencing a device
and/or procedure-related serious adverse event with onset within 7-days of any
ablation procedure (index or repeat procedure) that uses the Volt PFA System
that are defined below:
• Atrio-esophageal fistula1
• Cardiac tamponade/perforation2
• Death
• Heart block
• Myocardial infarction
• Pericarditis3
• Phrenic nerve injury resulting in permanent diaphragmatic paralysis
• Pulmonary edema
• Pulmonary vein stenosis1
• Stroke/cerebrovascular accident
• Thromboembolism
• Transient ischemic attack
• Vagal nerve injury/gastroparesis
• Major vascular access complications4 / major bleeding events5
• Device and/or procedure related cardiovascular and/or pulmonary adverse event
that prolongs hospitalization for more than 48 hours (excluding hospitalization
solely for arrhythmia recurrence or non-urgent cardioversion)
2 Long-term effectiveness will be summarized as the rate of freedom from
documented (symptomatic or asymptomatic) AF/AFL/AT episodes of >30 seconds
duration that are documented by protocol-specified 12-lead ECG,
trans-telephonic monitoring (TTM) or Holter monitor after the index ablation
procedure through 12 months of follow-up (after a 90-day blanking period
following the index ablation procedure).
Secondary outcome
The secondary endpoints will be evaluated if both the primary safety and
effectiveness endpoints are met..
Symptomatic Secondary Effectiveness Endpoint (Clinical Success)
The Symptomatic Secondary Effectiveness Endpoint has the same definition as the
Primary Effectiveness endpoint, except that a documented recurrence without
documentation of symptoms after the 90-day blanking period will not count as a
therapy failure in this analysis. The proportion of subjects achieving
Clinical Success through 12-months will be assessed vs. a pre-specified
performance goal performance goal.
AAD-Free Secondary Effectiveness Endpoint
The AAD-Free Secondary Effectiveness Endpoint has the same definition as the
Primary Effectiveness endpoint, except that any use of Class I or III AADs
after the 90-day blanking period will count as a therapy failure in this
analysis. The proportion of subjects achieving AAD-Free Effectiveness through
12-months will be assessed vs. a pre-specified performance goal
Additional Data
The following additional data will be summarized using descriptive statistics:
1. Acute Effectiveness: Acute procedural effectiveness will be summarized as
the rate of pulmonary veins treated with the Volt PFA system that are isolated
at the end of the index ablation procedure. Acute procedural failure for each
pulmonary vein is defined as any of the following:
a. Inability to isolate a pulmonary vein at the end of the index ablation
procedure or after maximum allowed therapy applications. Isolation will be
assessed via confirmation of electrical isolation in each targeted pulmonary
vein after a minimum waiting period of 20 minutes via entrance block at a
minimum. Touch-up ablation to achieve isolation will be allowed for any
pulmonary vein reconnection detected during the index procedure with the
investigational catheter (to the maximum delivery allowed per vein) and will
not be considered a failure.
b. Any use of a non-study ablation device for pulmonary vein isolation.
2. Rate of subjects with procedural success of PVI ablation with the Volt PFA
System defined above in the PTE population and in the Per Protocol population
(defined in Section 8.1), where inability to isolate any pulmonary vein would
constitute a failure.
3. Proportion of subjects with successful first-pass isolation of all targeted
veins, and proportion of all targeted pulmonary veins with successful
first-pass PV isolation, where first pass isolation is defined as confirmation
of entrance block in the ablated pulmonary vein following the initial minimum
waiting period of 20 minutes without any ablation after the start of the
20-minute waiting period.
4. Proportion of subjects that experience any procedure and/or Volt PFA
System-related adverse event (AE) throughout the 12-month follow-up period.
5. 6-month and 12-month single procedure effectiveness, defined as 6-month or
12-month effectiveness as above after a single ablation procedure. Any repeat
ablation procedure required by the subject at any time will be deemed a failure.
6. Proportion of subjects requiring one or more repeat AF ablations at 12
months following the index AF ablation procedure. Of those subjects with repeat
ablations, the proportion of treated pulmonary veins ablated with
reconnections, and locations of pulmonary vein reconnections (of treated veins)
upon electro-anatomical remapping.
7. Changes in EQ-5D-5L and AFEQT scores from baseline to follow up at 3, 6, and
12-months after the index procedure.
8. Procedure data, including but not limited to ablation data, mapping data,
usage of AutoMark, usage of the LivePoint, method(s) used for catheter
placement (e.g., fluoroscopy, intracardiac ultrasound, etc.), procedure time,
fluoroscopy time, total ablation time, LA dwell time, time to perform PVI, and
number and location of PFA energy applications.
9. Cardiovascular-related health care utilization through 12-months after the
index procedure, including but not limited to, cardiovascular or AF-related
hospitalization (includes readmission) or emergency visit, cardioversion,
repeat ablations, use of AADs after 3-month blanking period, and primary SAEs.
10. Arrhythmia monitoring (12-lead ECG, HM, and TTM) compliance.
Background summary
It has been estimated that 33.5 million people have atrial fibrillation (AF)
worldwide. And AF remains one of the most common cardiac arrhythmias and poses
a significant burden to healthcare systems worldwide. AF is associated with
mortality and comorbidities such as stroke, heart failure, and sudden cardiac
death. In a meta-analysis of contemporary, well-controlled, randomized clinical
trials in AF, the average annual stroke rate was 1.5%, and annualized death
rate was 3% in anticoagulated AF patients. A minority of these deaths are
related to stroke, while sudden cardiac death and death from progressive heart
failure are more frequent, emphasizing the need for interventions beyond
anticoagulation. Atrial fibrillation is also associated with high rates of
hospitalization. Additionally, patients with AF have significantly poorer
quality of life than healthy controls, experiencing a variety of symptoms
including lethargy, palpitations, dyspnea, chest pain, sleeping difficulties,
and mental distress.
The current conventional approach to perform catheter ablation is via thermal
energy, such as cryoablation or radiofrequency (RF) energy, to achieve
pulmonary vein isolation (PVI). However, there are many limitations to the
current standard of care ablation technologies, and even when PVI is performed
at highly experienced centers, reconnected PVs are observed in about 20% of
patients. Additionally, the reliance of these technologies on conductive
heating and cooling poses risks to organs or tissue adjacent to the heart which
can lead to adverse events such as atrial-esophageal fistula, pulmonary vein
stenosis, phrenic nerve palsy, among others. Irreversible electroporation (IRE)
is a mechanism of inducing cell death via the application of pulsed electric
fields (PEF). Pulsed field ablation (PFA) utilizes IRE to selectively
destabilize cellular membranes to initiate cell death, resulting in a
non-thermal ablation lesion. Interestingly, myocardial tissue has a lower
voltage threshold susceptible to PFA when compared to surrounding tissues such
as the esophagus, blood vessels, and nerve fibers, therefore reducing risk of
damage to these non-cardiac tissues and potentially lowering rates of
associated adverse events.
In review of the current literature, studies/surveys such as the
IMPULSE/PEFCAT/PEFCAT II, PersAFOne, ADVENT, InspIRE, PULSED AF, 5S, and
MANIFEST-PF have shown PFA catheters are as safe or safer than other ablation
strategies.21-28 Additionally, none of the clinical trials reviewed found PFA
catheters to be less safe than the current standard ablation catheters. Each
PFA device currently in pre-clinical or clinical investigation is unique in
their electrode design, pulse length, pulse number, and voltage. These
parameters are critical in developing optimal PFA energy delivery for safe and
durable lesions. Thus far, all studies have shown high acute efficacy in
achieving PVI and a low rate of recurrent atrial arrhythmias.
With the growing burden of AF on the healthcare system and continued need for
increased safety and effectiveness in treatments, the Volt* PFA System has been
developed to deliver high-voltage therapy for the safe and effective treatment
of symptomatic, recurrent, drug-refractory PAF and PersAF.
Study objective
The objective of the VOLT-AF study is to demonstrate that the Volt* PFA System
(Volt PFA System) is safe and effective for the treatment of symptomatic,
recurrent, drug refractory paroxysmal and persistent atrial fibrillation (AF).
Study design
Premarket, prospective, non-randomized, multicenter, clinical investigation.
Intervention
Pulsed Field Ablation using VOLT PFA System
Study burden and risks
Extensive risk analysis and risk mitigation plans will be implemented to
minimize any residual risk of the Volt* PFA Catheter, Sensor Enabled*, along
with the Volt* PFA Generator, Agilis* NxT Steerable Introducer Dual-Reach*, and
the EnSite* X EP System EnSite* Pulsed Field Ablation Module to subjects. The
risks associated with Abbott*s Volt PFA System are anticipated to be comparable
to those associated with the use of other commercially available ablation
catheters approved for the treatment of symptomatic, recurrent, drug-refractory
PAF and PersAF. The patients participating in this study are indicated for
cardiac ablation for treatment of symptomatic, recurrent, drug refractory PAF
or PersAF as part of their standard medical management and are subject to the
risks associated with these devices.
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Listed location countries
Age
Inclusion criteria
1. Documented symptomatic PAF or PersAF. Documentation requirements are as
follows:
Paroxysmal:
• Physician*s note indicating recurrent self-terminating AF with >= 2 episodes
of PAF within the 6 months prior to enrollment AND
• One electrocardiographically documented PAF episode within 12 months prior to
enrollment.
Persistent: Continuous AF sustained beyond 7 days and less than 1 year that is
documented by
• Physician's note, AND either
• 24-hour Holter within 180 days prior to enrollment, showing continuous AF, OR
• Two electrocardiograms (from any form of rhythm monitoring) showing
continuous AF:
o That are taken at least 7 days apart but less than 12 months apart
o If electrograms are more than 12 months apart, there must be one or more
Sinus Rhythm recordings in between or within 12 months prior to
consent/enrollment
o The most recent electrocardiogram must be within 180 days of enrollment.
NOTE: Documented evidence of the AF episode must either be continuous AF on a
12-lead ECG or include at least 30 seconds of AF from another ECG device.
2. Plans to undergo a PVI catheter ablation procedure due to symptomatic PAF or
PersAF and is refractory, intolerant, or contraindicated to at least one Class
I-IV AAD medication
3. At least 18 years of age
4. Able and willing to comply with all trial requirements including
pre-procedure, post- procedure, and follow-up testing and requirements
5. Informed of the nature of the trial, agreed to its provisions, and has
provided written informed consent as approved by the Institutional Review
Board/Ethics Committee (IRB/EC) of the respective clinical trial site.
Exclusion criteria
1. Previously diagnosed long-standing persistent atrial fibrillation
(Continuous AF greater than 1 year in duration)
2. Arrhythmia due to reversible causes including thyroid disorders, acute
alcohol intoxication, electrolyte imbalance, severe untreated sleep apnea, and
other major surgical procedures in the preceding 90 days
3. Patient known to require ablation beyond PVI at the time of consent.
4. Known presence of cardiac thrombus
5. Left atrial diameter >= 5.5 cm (anteroposterior diameter) within 180 days of
index procedure.
6. Left ventricular ejection fraction < 35% as assessed with echocardiography
within 180 days of index procedure
7. New York Heart Association (NYHA) class III or IV heart failure
8. Body mass index > 40 kg/m2
9. Pregnant, nursing, or planning to become pregnant during the clinical
investigation follow-up period
10. Patients who have had a ventriculotomy or atriotomy within the preceding 30
days of procedure,
11. Myocardial infarction (MI), acute coronary syndrome, percutaneous coronary
intervention (PCI), or valve or coronary bypass grafting surgery within
preceding 90 days
12. Unstable angina
13. Stroke or TIA (transient ischemic attack) within the last 90 days
14. Heart disease in which corrective surgery is anticipated within 180 days
after procedure
15. History of blood clotting or bleeding abnormalities including
thrombocytosis, thrombocytopenia, bleeding diathesis, or suspected
anti-coagulant state
16. Contraindication to long term anti-thromboembolic therapy
17. Patient unable to receive heparin or an acceptable alternative to achieve
adequate anticoagulation
18. Known sensitivity to contrast media (if needed during the procedure) that
cannot be controlled with pre-medication
19. Previous left atrial surgical or left atrial catheter ablation procedure
(including LAA closure device)
20. Presence of any condition that precludes appropriate vascular access
21. Severe mitral regurgitation (regurgitant volume >= 60 mL/beat, regurgitant
fraction >= 50%, and/or effective regurgitant orifice area >= 0.40cm2).
22. Previous tricuspid or mitral valve replacement or repair
23. Patients with prosthetic valves
24. Patients with a myxoma
25. Patients with an interatrial baffle or patch as the transseptal puncture
could persist and produce an iatrogenic atrial shunt
26. Stent, constriction, or stenosis in a pulmonary vein
27. Rheumatic heart disease
28. Hypertrophic cardiomyopathy
29. Diagnosed with amyloidosis or atrial amyloidosis
30. Active systemic infection
31. Renal failure requiring dialysis
32. Severe pulmonary disease (e.g., restrictive pulmonary disease, constrictive
or chronic obstructive pulmonary disease) or any other disease or malfunction
of the lungs or respiratory system that produces severe chronic symptoms
33. Presence of an implantable therapeutic cardiac device including permanent
pacemaker, biventricular pacemaker, or any type of implantable cardiac
defibrillator (with or without biventricular pacing function) or planned
implant of such a device for any time during the follow-up period. Presence of
an implantable loop recorder is acceptable as long as it is removed prior to
insertion of the investigational device.
34. Presence of an implanted LAA closure device or plans to have an LAA closure
device implanted during the follow-up period
35. Patient is currently participating in another clinical trial or has
participated in a clinical trial within 30 days prior to screening that may
interfere with this clinical trial without pre-approval from this study Sponsor
36. Unlikely to survive the protocol follow up period of 12 months
37. Presence of other medical, anatomic, comorbid, social, or psychological
conditions that, in the investigator*s opinion, could limit the subject*s
ability to participate in the clinical investigation or to comply with
follow-up requirements, or impact the scientific soundness of the clinical
investigation results.
38. Individuals without legal authority
39. Individuals unable to read or write
Design
Recruitment
Medical products/devices used
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
Register | ID |
---|---|
ClinicalTrials.gov | NCT06223789 |
CCMO | NL86594.000.24 |