Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Paradigm I Clinical Trial: Study of the PFX Closure System in Subjects With Cryptogenic Stroke, Transient Ischemia Attack or Paradoxical Embolism

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified November 2006 by Cierra.
Recruitment status was:  Active, not recruiting
Information provided by:
Cierra Identifier:
First received: September 12, 2005
Last updated: November 27, 2006
Last verified: November 2006
The primary objective of this study is to demonstrate the safety of the PFX Closure System when utilized for patients with patent foramen ovale (PFO) suffering from cryptogenic stroke, transient ischemic attacks or paradoxical embolism.

Condition Intervention
Patent Foramen Ovale
Device: PFX Closure System

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Feasibility Study of the PFX Closure System in Subjects With Cryptogenic Stroke, Transient Ischemia Attack or Paradoxical Embolism

Further study details as provided by Cierra:

Primary Outcome Measures:
  • PFO closure as measured by transesophageal echocardiography (TEE) or transcranial Doppler (TCD) acutely post procedure

Secondary Outcome Measures:
  • PFO closure as measured by TEE or TCD at 30 days post procedure
  • Neurological death and adverse event (AE) rates for all subjects through 30 day follow-up
  • New arrhythmia rate through 30 day follow-up. For any subjects with new arrhythmia, arrhythmia status will also be evaluated at a follow-up visit from 3 to 6 months post procedure
  • PFO closure rate at 3 to 6 months for any subject not demonstrating complete closure at the 30 day follow-up

Estimated Enrollment: 40
Study Start Date: April 2005
Detailed Description:
Patent Foramen Ovale has been implicated in the etiology of paradoxical embolism, cryptogenic stroke, transient ischemic attack (TIA), and right to left gas embolism in severe decompression illness. An association between patent foramen ovale and severe migraine headaches has also been reported. Several implantable devices are being used for percutaneous closure of patent foramen ovale; we propose to use a non-implantable system to safely effect closure.

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Subject is between 18 and 65 years old.
  • Documented patent foramen ovale as determined by positive micro bubble study demonstrating right to left shunt and/or anatomic detection and functional assessment by pre-operative TCD and peri-operative echocardiography or ultrasound.
  • Subjects with a history of cryptogenic stroke, transient ischemic attack or paradoxical embolism due to presumed paradoxical embolism through a PFO.
  • Negative pregnancy test in women who are of child-bearing potential.
  • Signed Informed Consent form.

Exclusion Criteria:

  • Presence of thrombus at the intended site of closure, in left atrial appendage, or documented evidence of venous thrombus in the vessels through which access to the PFO is gained.
  • Active endocarditis, or other infections producing a bacteremia.
  • Presence of atrial septal defects or fenestrations which allow right-to-left shunting.
  • Presence of implanted cardiac valves, pacemaker, implantable cardioverters/defibrillators (ICDs) or vena cava filters.
  • Subjects with an intra-cardiac mass, tumor, clot or vegetation.
  • Large, redundant atrial septal aneurysm that would prohibit adequate device access to the PFO or closure of the PFO, in the judgment of the investigator. A coexisting redundant atrial septal aneurysm is considered large if it prohibits the ability of the operator to adequately achieve vacuum suction necessary to achieve PFO closure.
  • Presence of arrhythmia requiring pharmacologic or electrical therapy intervention or 1st degree block.
  • Current enrollment in any investigational trial(s) using devices implanted in the vascular system or enrolled in any experimental drug study(ies) within three months of study entry.
  • History of stroke or TIA within the past 14 days.
  • Source of stroke other than paradoxical embolization.
  • Hemodynamic instability or shock.
  • Hypercoagulable disorder.
  • Subjects with coagulation disorders who are unable to take antiplatelet or anticoagulant therapy.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00196027

CardioVascular Center, Sankt katharinen
FrankFurt/Main, Germany
Sponsors and Collaborators
Principal Investigator: Horst Sievert, MD Cardio Vasculares Centrum - Sankt Katharien
  More Information Identifier: NCT00196027     History of Changes
Other Study ID Numbers: 2005-001 version 1
Study First Received: September 12, 2005
Last Updated: November 27, 2006

Additional relevant MeSH terms:
Foramen Ovale, Patent
Embolism, Paradoxical
Pathologic Processes
Embolism and Thrombosis
Vascular Diseases
Cardiovascular Diseases
Heart Septal Defects, Atrial
Heart Septal Defects
Heart Defects, Congenital
Cardiovascular Abnormalities
Heart Diseases
Congenital Abnormalities
Thromboembolism processed this record on April 25, 2017