ClinicalTrials.gg
CompletedNCT05457673STEP IVUpdated Mar 3, 2023

Subcostal Temporary Extravascular Pacing IV (STEP IV) Study

An interventional study of AtaCor StealthTrac Lead in Conduction Defect, sponsored by AtaCor Medical, Inc.. Completed at 1 site in Paraguay. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-03-03.

Sponsored by AtaCor Medical, Inc. · Not applicable, Interventional, and Basic science

Phase
Not applicable
Study type
Interventional
Enrollment
12
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

The STEP IV Study is a prospective, single-center, non-randomized, single-arm study without concurrent or historical controls. The objective of the study is to generate safety and performance data of the latest AtaCor EV Temporary Pacing Lead System to support the development of a future pivotal study with an indication limited to a maximum of 7 days.

Read the detailed description

The primary safety objective is freedom from Adverse Device Effects (ADE). The primary performance objective is summary statistics for pacing capture threshold, impedance, and sensed R-wave amplitude with the StealthTrac Lead from insertion through removal.

One (1) Investigational Site in Paraguay will participate with up to 16 subjects enrolled in the study. Subjects indicated for a closed-chest cardiac invasive procedure will be eligible for participation. Subjects undergoing a qualifying index procedure will have a Model AC-1013 StealthTrac Lead inserted and evaluated over the follow-up period (up to 7 days post procedure). Study participation requires 2 to 7 days with the Study Lead inserted. Following Study Lead removal, a final follow-up will be performed 27-33 days after lead insertion to assess for any latent Adverse Events. Subjects remain enrolled until completion of the 30-Day Follow Up.

The maximum duration for study participation is 33 days. The Study is expected to last up to 3 months after first enrollment: Enrollment and follow-up (1 month) and final report (2 months).

02

Conditions studied

  • Conduction Defect

Keywords

  • Temporary Ventricular Pacing
  • Extravascular
03

In context

Arrhythmias, Cardiac

1,051 studies on the registry are indexed under Arrhythmias, Cardiac; 236 are open to participants now.

This study's enrollment of 12 is below the median of 100 across 517 interventional studies indexed under Arrhythmias, Cardiac.

Browse Arrhythmias, Cardiac studies →

Lead sponsor

AtaCor Medical, Inc. is the lead sponsor of 11 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. At least 18 years old
  2. Indicated for closed-chest cardiac invasive procedure (e.g., transcatheter valve replacement, balloon valvuloplasty, permanent pacemaker implantation and pacing lead extractions/revisions)

Exclusion criteria

Exclusion Criteria:

  1. ≥ 35 kg/m2
  2. Septic shock
  3. Severe anemia
  4. Acute coronary syndrome within past 90 days
  5. IV Functional Classification of heart failure within past 90 days
  6. Circumstances that prevent data collection or follow-up (e.g., inability to perform a short walk with the Holter monitor)
  7. Participation in any concurrent clinical study without prior written approval from the Sponsor
  8. Inability or unwillingness to provide to participate in the Study

    Known prior history for any of the following:

  9. Median or partial sternotomy
  10. Surgery with disruption of the lung, pericardium or connective tissue between the sternum and pericardium
  11. Significant anatomic derangement of or within the thorax (e.g., pectus excavatum, significant scoliosis)
  12. Thoracic radiation therapy, pneumothorax, pneumomediastinum or other medical treatments/conditions which may complicate the AtaCor EV Temporary Pacing Lead System insertion procedure
  13. Pericardial disease, pericarditis and mediastinitis
  14. Medical treatments, surgeries or conditions that increase the potential for pericardial adhesions
  15. \< 1 liter
  16. Surgically corrected congenital heart disease (not including catheter-based procedures)
  17. Allergies to the device materials such as stainless steel, titanium, platinum, iridium, polyethylene, polyurethane, polycarbonate, and silicone
Terms in these criteria, in plain language(4)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

FEV1

From a breathing test (spirometry): how much air you can blow out in the first second. Often given as a percentage of what is expected for your age, height and sex.

05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
12 participants (actual)

Study arms

  • Experimental
    AtaCor EV Temporary Pacing Lead System

    Subjects implanted with the AtaCor StealthTrac Lead Model AC-1013

    Device: AtaCor StealthTrac Lead

Interventions

  • DeviceAtaCor StealthTrac Lead

    Subjects will receive the AtaCor StealthTrac Lead being evaluated in the study.

06

What researchers measure

Primary outcomes

  1. Freedom from ADEs

    Freedom from Adverse Device Effects (ADEs)

    Time frame: Up to 7 days post-implant

  2. Pacing Capture Threshold (V or mA)

    Summary statistics for pacing capture threshold with the StealthTrac Lead from insertion through removal

    Time frame: Up to 7 days post-implant

  3. Impedance (Ohms)

    Summary statistics for impedance with the StealthTrac Lead from insertion through removal

    Time frame: Up to 7 days post-implant

  4. Sensed R-Wave Amplitude (mV)

    Summary statistics for sensed R-wave amplitude with the StealthTrac Lead from insertion through removal

    Time frame: Up to 7 days post-implant

07

Study locations

1 site
  • Sanatorio Italiano
    Asunción, Paraguay
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 3, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05457673
Lead sponsor
AtaCor Medical, Inc.
Responsible party
Sponsor
First posted
Jul 14, 2022
Start date
Aug 17, 2022
Primary completion
Sep 22, 2022
Completion
Oct 20, 2022
Last update
Mar 3, 2023

Study contacts

Martin C Burke, DO
principal investigator · AtaCor Medical, Inc.

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2023. You cannot join it, but the record below documents what was studied.

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Discussion

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