EnTRINSIC - EnPulse Trial on Search AV+ Influence

This study has been terminated.
(Protocol pre-specified interim analysis showed that difference between groups was too small to reach significance.)
Information provided by:
Medtronic Bakken Research Center
ClinicalTrials.gov Identifier:
First received: September 9, 2005
Last updated: October 15, 2009
Last verified: October 2009
Right ventricular apical pacing in patients treated with a pacemaker is unnecessary in cases where patients have stable atrioventricular (AV)-conduction. Recent findings demonstrate that pacing even might have unfavourable effects, especially if patients suffer from additional cardiac diseases such as heart failure. The Search AV+ algorithm was designed to avoid ventricular pacing and support intrinsic AV-conduction in order to avoid possible detrimental effects of right ventricular apical pacing. The goal of the EnTRINSIC study is to assess the amount of ventricular stimulation, the amount of hospitalizations, the occurrence of atrial fibrillation and the usage of drugs in patients treated with pacemakers with an activated Search AV+ algorithm versus patients treated with an individual optimization of the pacemaker settings to minimize the amount of right ventricular pacing.

Condition Intervention Phase
Arrhythmia, Sinus
Device: Search AV+ algorithm
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind
Primary Purpose: Treatment
Official Title: EnPulse Trial on Search AV+ Influence

Resource links provided by NLM:

Further study details as provided by Medtronic Bakken Research Center:

Primary Outcome Measures:
  • Amount of right ventricular pacing

Secondary Outcome Measures:
  • Change in intrinsic AV delay
  • Hospitalizations because of symptomatic heart failure
  • Hospitalizations because of symptomatic atrial fibrillation
  • Medication

Estimated Enrollment: 300
Study Start Date: February 2004
Study Completion Date: November 2007
Primary Completion Date: November 2007 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients with sinus node disease and an intrinsic AV delay of maximal 260 ms
  • Patients treated with a Medtronic pacemaker with Search AV+ algorithm

Exclusion Criteria:

  • Patients with documented persistent atrial fibrillation within 6 months before implantation and slow AV-conduction
  • New York Heart Association (NYHA) III/IV
  • Instable angina pectoris
  • Heart valve vitium
  • Persistent AV-block II and III
  • Early diastolic mitral regurgitation
  • Implantable cardioverter defibrillator
  • Participation in other clinical studies
  • Pregnancy or unreliable birth control
  • AV-block under strain
  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 ClinicalTrials.gov identifier: NCT00157794

Klinikum Großhadern Herzchirurgische Klinik und Poliklinik
Munich, Bavaria, Germany, 81377
Internistische Praxis Dr. Med. Schade
Berlin, Germany, 13187
St. Josefs Hospital
Bochum, Germany, 44791
Praxis Dr. Med. Markert
Gaggenau, Germany, 76571
Krankenhaus Martha Maria Halle
Halle, Germany
Universitätsklinikum Heidelberg
Heidelberg, Germany, 69120
St. Vincentius Kliniken
Karlsruhe, Germany, 76135
Vinzentius Krankenhaus
Landau, Germany, 76829
Klinikum der Johannes-Gutenberg-Universität
Mainz, Germany, 55131
Städtisches Klinikum Neunkirchen
Neunkirchen, Germany, 66538
Kreiskrankenhaus Ottweiler
Ottweiler, Germany, 66564
Knappschaftskrankenhaus Sulzbach, Medizinische Klinik
Sulzbach, Germany, 66280
Warendorf, Germany, 48231
Gemeinschaftspraxis Dr. Tamm/Dr. Hon
Wittenberg, Germany
Sponsors and Collaborators
Medtronic Bakken Research Center
Principal Investigator: Michael Jakob, MD Knappschaftskrankenhaus Sulzbach
Principal Investigator: Peter Lamm, MD Klinikum der Universität München Großhadern
  More Information

Additional Information:
ClinicalTrials.gov Identifier: NCT00157794     History of Changes
Other Study ID Numbers: CEN_G_CA_2 
Study First Received: September 9, 2005
Last Updated: October 15, 2009
Health Authority: Germany: Federal Institute for Drugs and Medical Devices

Keywords provided by Medtronic Bakken Research Center:
Sinus Node Disease
Dual Chamber Pacemaker

Additional relevant MeSH terms:
Arrhythmia, Sinus
Arrhythmias, Cardiac
Cardiovascular Diseases
Heart Diseases
Pathologic Processes

ClinicalTrials.gov processed this record on May 04, 2016