QuickFlex Micro Left Ventricular Lead Post Approval Study

Sponsor
Abbott Medical Devices (Industry)
Overall Status
Completed
CT.gov ID
NCT01179477
Collaborator
(none)
1,930
77
84
25.1
0.3

Study Details

Study Description

Brief Summary

The purpose of this multicenter post-approval study is to evaluate the acute and chronic performance of the QuickFlex® μ 1258T left ventricular (LV) lead.

Condition or Disease Intervention/Treatment Phase
  • Device: Implantation of a QuickFlex® μ Model 1258T LV Lead

Detailed Description

The primary endpoints of the study are:
  • Freedom from LV lead-related complications at 5 years

  • LV bipolar capture threshold of St. Jude Medical's QuickFlex®µ 1258T LV Lead measured at 0.5 ms at 5 years

Study Design

Study Type:
Observational
Actual Enrollment :
1930 participants
Observational Model:
Case-Only
Time Perspective:
Prospective
Official Title:
QuickFlex® μ Model 1258T Left Heart Pacing Lead Post Approval Study
Actual Study Start Date :
Sep 1, 2010
Actual Primary Completion Date :
Sep 1, 2017
Actual Study Completion Date :
Sep 1, 2017

Outcome Measures

Primary Outcome Measures

  1. Percent of Participants Alive and Without a Left Ventricular Lead-related Complication [5 years]

    Percent of Participants Alive and Without a Left Ventricular Lead-related Complication at 5 years of follow-up. Per FDA, data from IDE subjects who did not consent to rollover into the post approval study at sites participating in the post approval study, were included in this analysis (see clinical investigational protocol).

  2. Left Ventricular Bipolar Pacing Capture Threshold [5 years]

    Mean left ventricular bipolar pacing capture threshold measured at 0.5 ms pulse width at 5 years of follow-up

Eligibility Criteria

Criteria

Ages Eligible for Study:
18 Years and Older
Sexes Eligible for Study:
All
Accepts Healthy Volunteers:
No
Inclusion Criteria:
  • Have an approved indication per American College of Cardiology/American Heart Association/Heart Rhythm Society guidelines for implantation of a CRT-D system or participated in the QuickFlex® μ1258T (Investigational Device Exemption (IDE) study

  • Have the ability to provide informed consent for study participation and be willing and able to comply with the prescribed follow-up tests and schedule of evaluations

Exclusion Criteria:
  • Have a hypersensitivity to a single 1.0mg dose of dexamethasone sodium phosphate or short term contact with heparin

  • Have a life expectancy of less than 5 years due to any condition

  • Be less than 18 years of age

Contacts and Locations

Locations

Site City State Country Postal Code
1 Cardiovascular Associates P.C. Birmingham Alabama United States 35213
2 University Hospital - Univ. of Alabama at Birmingham (UAB) Birmingham Alabama United States 35294
3 Heart Center Research, LLC. Huntsville Alabama United States 35801
4 Alaska Heart Institute Anchorage Alaska United States 99508
5 Arizona Arrhythmia Research Center Phoenix Arizona United States 85013
6 Arizona Arrhythmia Consultants Scottsdale Arizona United States 85252
7 Arkansas Cardiology Little Rock Arkansas United States 72205
8 St. Vincent Heart Clinic Arkansas Little Rock Arkansas United States 72205
9 Arkansas Heart Hospital Little Rock Arkansas United States 72211
10 Northwest Cardiology Springdale Arkansas United States 72764
11 Glendale Memorial Hospital and Medical Center Glendale California United States 91206
12 Kaiser Permanente Los Angeles Medical Center Los Angeles California United States 90027
13 Regional Cardiology Associates Sacramento California United States 95819
14 University of California at San Diego (UCSD) Medical Center San Diego California United States 92118
15 Claudio Bonometti MD, Inc Santa Barbara California United States 93105
16 Los Angeles Biomedical Research Institute at Harbor-UCLA Torrance California United States 90502
17 Christiana Hospital Newark Delaware United States 19713
18 Shands Jacksonville Jacksonville Florida United States 32209
19 Naushad Shaik, MD Kissimmee Florida United States 32804
20 Munroe Regional Medical Center Ocala Florida United States 34471
21 Usman R. Siddiqui, MD Orlando Florida United States 32803
22 Orlando Heart Center Orlando Florida United States 32806
23 Brevard Cardiovascular Research Associates, Inc. Rockledge Florida United States 32955
24 University of South Florida, Cardiovascular Services Tampa Florida United States 33606
25 Athens Regional Medical Center Athens Georgia United States 30306
26 St. Joseph's Hospital Atlanta Georgia United States 30045
27 Redmond Regional Medical Center Rome Georgia United States 30165
28 Prairie Education and Research Cooperative Springfield Illinois United States 62701
29 Parkview Research Center Fort Wayne Indiana United States 46805
30 The Heart Group Newburgh Indiana United States 47630
31 Iowa Heart Center West Des Moines Iowa United States 50266
32 Mid-America Cardiology Associates, PC Kansas City Kansas United States 66160
33 King's Daughters Medical Center Ashland Kentucky United States 41101
34 Central Baptist Hospital Lexington Kentucky United States 40503
35 Norton Bluegrass Heart Specialists Louisville Kentucky United States 40217
36 Peninsula Cardiology Associates, P.A. Salisbury Maryland United States 21804
37 Massachusetts General Hospital Boston Massachusetts United States 02114
38 Trinity Health-Michigan d/b/a Michigan Heart Ann Arbor Michigan United States 48197
39 Thoracic Cardio Healthcare Found. (aka Sparrow Research) Lansing Michigan United States 48912
40 MidMichigan Physicians Group Midland Michigan United States 48640
41 Jackson Heart Clinic Jackson Mississippi United States 39216
42 Cardiology Associates of North Mississippi Tupelo Mississippi United States 38801
43 Missouri Baptist Medical Center Saint Louis Missouri United States 63131
44 Heart Consultants P.C. Omaha Nebraska United States 68122
45 AtlantiCare Regional Medical Center Pomona New Jersey United States 08240
46 Lourdes Cardiology Services Voorhees New Jersey United States 08043
47 New Jersey Cardiology Associates West Orange New Jersey United States 07052
48 Lenox Hill Hospital New York New York United States 10028
49 LeBauer HeartCare Greensboro North Carolina United States 27401
50 Wake Forest University Medical Center Clinical Sciences Winston-Salem North Carolina United States 27157
51 Primed Cardiology/Kettering Medical Center Network Kettering Ohio United States 45429
52 Regional Cardiovascular Medical Center Steubenville Ohio United States 43953
53 The Toledo Hospital Toledo Ohio United States 43615
54 Toledo Clinic Toledo Ohio United States 43623
55 St. Elizabeth Health Center Youngstown Ohio United States 44505
56 Providence Heart and Vascular Institute Portland Oregon United States 97220
57 Tri-State Medical Group Cardiology Beaver Pennsylvania United States 15009
58 Capital Cardiovascular Associates Camp Hill Pennsylvania United States 17011
59 Hospital of the University of Pennsylvania Philadelphia Pennsylvania United States 19104
60 Donald Guthrie Foundation for Education and Research Sayre Pennsylvania United States 18840
61 WellSpan Health York Pennsylvania United States 17405
62 Medical University of South Carolina Charleston South Carolina United States 29425
63 Cardiology Consultants Johnson City Tennessee United States 37601
64 Methodist University Hospital Memphis Tennessee United States 38104
65 The Stern Cardiovascular Foundation Memphis Tennessee United States 38120
66 Texas Cardiac Arrhythmia Austin Texas United States 78705
67 HeartPlace Bedford Texas United States 76021
68 Advanced Heart Care Plano Texas United States 75093
69 South Texas Cardiovascular Consultants San Antonio Texas United States 78201
70 Brooke Army Medical Center San Antonio Texas United States 78234
71 Cardiovascular Associates of East Texas Tyler Texas United States 75701
72 McKay-Dee Heart Services Ogden Utah United States 84403
73 University of Utah Hospital Salt Lake City Utah United States 84132
74 Cardiovascular Associates Ltd Chesapeake Virginia United States 23320
75 Charleston Area Medical Center Charleston West Virginia United States 25304
76 St. Mary's Hospital Madison Wisconsin United States 53715
77 Cardiac Rhythm Specialists, S.C. Milwaukee Wisconsin United States 53211

Sponsors and Collaborators

  • Abbott Medical Devices

Investigators

  • Study Director: Clay Cohorn, Abbott Medical Devices

Study Documents (Full-Text)

More Information

Publications

None provided.
Responsible Party:
Abbott Medical Devices
ClinicalTrials.gov Identifier:
NCT01179477
Other Study ID Numbers:
  • CRD561
First Posted:
Aug 11, 2010
Last Update Posted:
Aug 12, 2019
Last Verified:
Jul 1, 2019
Individual Participant Data (IPD) Sharing Statement:
No
Plan to Share IPD:
No
Keywords provided by Abbott Medical Devices
Additional relevant MeSH terms:

Study Results

Participant Flow

Recruitment Details Per the clinical investigation protocol, IDE subjects (n=54) who did not consent to roll over into the post approval study (PAS) at sites participating in the post approval study, were included in primary endpoint analyses. Since these subjects are not enrolled into the PAS, they are not reflected in the participant flow.
Pre-assignment Detail
Arm/Group Title Subjects Implanted With a New QuickFlex μ Lead
Arm/Group Description Subjects implanted with a new QuickFlex μ lead and subjects previously enrolled in the QuickFlex μ IDE study were enrolled into the post-approval study. All successfully enrolled subjects were followed every six months for a period of five years.
Period Title: Overall Study
STARTED 1930
COMPLETED 843
NOT COMPLETED 1087

Baseline Characteristics

Arm/Group Title Subjects Implanted With a New QuickFlex μ Lead
Arm/Group Description Subjects implanted with a new QuickFlex μ lead and subjects previously enrolled in the QuickFlex μ IDE study were enrolled into the post-approval study. All successfully enrolled subjects were followed every six months for a period of five years.
Overall Participants 1930
Age (years) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [years]
68.7
(11.2)
Sex: Female, Male (Count of Participants)
Female
529
27.4%
Male
1401
72.6%
Race/Ethnicity, Customized (Count of Participants)
Asian
8
0.4%
American Indian or Alaska Native
2
0.1%
Black or African American
197
10.2%
Hispanic or Latino
67
3.5%
Native Hawaiian/Pacific Islander
2
0.1%
Other
8
0.4%
White
1646
85.3%
Region of Enrollment (participants) [Number]
United States
1930
100%
Left Ventricular Ejection Fraction (Percent of blood ejected) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [Percent of blood ejected]
25.1
(7.6)
Intrinsic QRS duration (ms) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [ms]
152.0
(25.2)
New York Heart Association (NYHA) Classification at Baseline (Count of Participants)
Class I
19
1%
Class II
175
9.1%
Class III
1672
86.6%
Class IV
61
3.2%
Unknown
3
0.2%
Cardiomyopathy (Count of Participants)
Ischemic
1131
58.6%
Non-ischemic
799
41.4%

Outcome Measures

1. Primary Outcome
Title Percent of Participants Alive and Without a Left Ventricular Lead-related Complication
Description Percent of Participants Alive and Without a Left Ventricular Lead-related Complication at 5 years of follow-up. Per FDA, data from IDE subjects who did not consent to rollover into the post approval study at sites participating in the post approval study, were included in this analysis (see clinical investigational protocol).
Time Frame 5 years

Outcome Measure Data

Analysis Population Description
The analysis population for Primary Endpoint #1 includes newly enrolled and IDE rollover subjects with an attempted implant of the QuickFlex μ LV lead (n=1,930) and subjects from the IDE sites that agreed to participate in the post-approval study, but did not consent to rollover into the post-approval study (n=54), for a total of 1,984 subjects.
Arm/Group Title Subjects Implanted With a New QuickFlex μ Lead
Arm/Group Description Subjects implanted with a new QuickFlex μ lead and subjects previously enrolled in the QuickFlex μ Investigational Device Exemption (IDE) study were enrolled into the PAS study. All successfully enrolled subjects were followed every six months for a period of five years.
Measure Participants 1984
Count of Participants [Participants]
1902
98.5%
2. Primary Outcome
Title Left Ventricular Bipolar Pacing Capture Threshold
Description Mean left ventricular bipolar pacing capture threshold measured at 0.5 ms pulse width at 5 years of follow-up
Time Frame 5 years

Outcome Measure Data

Analysis Population Description
Subjects included in this analysis are only those who have left ventricular bipolar pacing capture threshold values reported a the 5-year visit. Of the 843 who completed the 5 year visit, only 774 had analzable data.
Arm/Group Title Subjects Implanted With a New QuickFlex μ Lead
Arm/Group Description Subjects implanted with a new QuickFlex μ lead and subjects previously enrolled in the QuickFlex μ Investigational Device Exemption (IDE) study were enrolled into the PAS study. All successfully enrolled subjects were followed every six months for a period of five years.
Measure Participants 774
Mean (Standard Deviation) [Volts]
2.04
(1.6)

Adverse Events

Time Frame Complications and observations post implant through 5 years
Adverse Event Reporting Description Complications are considered serious adverse events. A complication is an event caused by or associated with the study device, system component(s) and/or procedure that requires invasive intervention (e.g. post-implant lead dislodgement requiring repositioning). An observation is an event caused by or associated with the study device, system component(s) and/or procedure that does not require invasive intervention (e.g. over-sensing or loss of pacing capture requiring reprogramming)
Arm/Group Title Subjects Implanted With a New QuickFlex μ Lead
Arm/Group Description Subjects implanted with a new QuickFlex μ lead and subjects previously enrolled in the QuickFlex μ Investigational Device Exemption (IDE) study were enrolled into the PAS study. All successfully enrolled subjects were followed every six months for a period of five years.
All Cause Mortality
Subjects Implanted With a New QuickFlex μ Lead
Affected / at Risk (%) # Events
Total 542/1930 (28.1%)
Serious Adverse Events
Subjects Implanted With a New QuickFlex μ Lead
Affected / at Risk (%) # Events
Total 258/1930 (13.4%)
Infections and infestations
Infection 24/1930 (1.2%) 24
Erosion 2/1930 (0.1%) 2
Endocarditis 1/1930 (0.1%) 1
RV Endocarditis 1/1930 (0.1%) 1
RV Infection 1/1930 (0.1%) 1
Injury, poisoning and procedural complications
Lead Dislodgement or Migration 62/1930 (3.2%) 63
Diaphragmatic/Phrenic Nerve Stimulation 16/1930 (0.8%) 16
Dizziness 1/1930 (0.1%) 1
Endocarditis 1/1930 (0.1%) 1
Induced Atrial or Ventricular Arrhythmias 1/1930 (0.1%) 1
Pain/Discomfort At Incision Site 2/1930 (0.1%) 2
Pericardial Effusion 2/1930 (0.1%) 2
RA Cardiac/Coronary Sinus Perforation 1/1930 (0.1%) 1
RA Diaphragmatic/Phrenic Nerve Stimulation 1/1930 (0.1%) 1
RV Lead Dislodgement or Migration 31/1930 (1.6%) 32
RV Cardiac/Coronary Sinus Perforation 3/1930 (0.2%) 3
RV Cardiac Tamponade 1/1930 (0.1%) 1
RV Pectoral Stimulation 1/1930 (0.1%) 1
Procedure Hematoma/Seroma 9/1930 (0.5%) 9
Procedure Pneumothorax/Hemothorax 7/1930 (0.4%) 7
Procedural Pericardial Effusion 3/1930 (0.2%) 3
Procedural Cardiac/Coronary Sinus Perforation 2/1930 (0.1%) 2
Procedural Cardiac Arrest 1/1930 (0.1%) 1
Procedural Cardiac Tamponade 1/1930 (0.1%) 1
Procedural Deep Vein Thrombosis 1/1930 (0.1%) 1
Procedural Device Migration 1/1930 (0.1%) 1
Procedural Guidewire Stuck In LV Lead 1/1930 (0.1%) 1
Procedural Lead Dislodgement or Migration 1/1930 (0.1%) 1
Procedural Pleural Effusion 1/1930 (0.1%) 1
Procedural Skin Injury At PG Pocket 1/1930 (0.1%) 1
Product Issues
Loss of Capture 9/1930 (0.5%) 9
Elevated Pacing Thresholds 8/1930 (0.4%) 8
Abnormal LV Lead Pacing Impedance <= 200 OHMS or >= 2000 OHMS 3/1930 (0.2%) 3
Lead Fracture 1/1930 (0.1%) 1
Lead Insulation Damage 1/1930 (0.1%) 1
Premature Battery Depletion 8/1930 (0.4%) 8
Suspected Generator Malfunction 4/1930 (0.2%) 4
LV Lead Loss of Capture 1/1930 (0.1%) 1
RA Lead Dislodgement or Migration 20/1930 (1%) 22
RA Abnormal Lead Impedance 4/1930 (0.2%) 4
RA Lead Insulation Damage 4/1930 (0.2%) 4
RA Loss of Capture 2/1930 (0.1%) 2
RA Atrial Lead Noise 1/1930 (0.1%) 1
RA Elevated Pacing Thresholds 1/1930 (0.1%) 1
RA Oversensing 1/1930 (0.1%) 1
RA Undersensing 1/1930 (0.1%) 1
RV Elevated Pacing Thresholds 9/1930 (0.5%) 9
RV Lead Fracture 7/1930 (0.4%) 7
RV Lead Insulation Damage 5/1930 (0.3%) 5
RV Abnormal Lead Impedance 4/1930 (0.2%) 4
RV Loss of Capture 2/1930 (0.1%) 2
RV Inappropriate Shock 1/1930 (0.1%) 1
RV Oversensing 1/1930 (0.1%) 1
RV Lead Unable to Defibrillate 1/1930 (0.1%) 1
RV Undersensing 1/1930 (0.1%) 1
Psychiatric disorders
Twiddler Syndrome 3/1930 (0.2%) 4
Other (Not Including Serious) Adverse Events
Subjects Implanted With a New QuickFlex μ Lead
Affected / at Risk (%) # Events
Total 512/1930 (26.5%)
Cardiac disorders
System/Pulse Generator Related Therapy For Non-Ventricular Rhythm 23/1930 (1.2%) 27
System/Pulse Generator Related Idioventricular Rhythm Preventing Biventricular Pacing 1/1930 (0.1%) 1
RV Lead Related Therapy For Non-Ventricular Rhythm 6/1930 (0.3%) 6
Other Therapy For Non-Ventricular Rhythm 6/1930 (0.3%) 6
General disorders
Other Pulmonary Edema 2/1930 (0.1%) 2
Infections and infestations
Procedure Related Infection 4/1930 (0.2%) 4
Other Infection 1/1930 (0.1%) 2
Injury, poisoning and procedural complications
LV Diaphragmatic/Phrenic Nerve Stimulation 145/1930 (7.5%) 164
LV Induced Atrial or Ventricular Arrhythmias 2/1930 (0.1%) 2
LV Lead Dislodgement or Migration 2/1930 (0.1%) 2
LV Cardiac/Coronary Sinus Dissection 1/1930 (0.1%) 1
LV Coronary Sinus or Cardiac Vein Thrombosis 1/1930 (0.1%) 1
RA Lead Related Lead Dislodgement or Migration 1/1930 (0.1%) 1
RA Lead Related Myopotential Sensing 1/1930 (0.1%) 1
RV Lead Related Bilateral Pleural Effusion 1/1930 (0.1%) 1
RV Lead Related Myopotential Sensing 1/1930 (0.1%) 1
RV Lead Related Pectoral Stimulation 1/1930 (0.1%) 1
Procedure Related Hematoma/Seroma 33/1930 (1.7%) 33
Procedure Related Cardiac/Coronary Sinus Dissection 12/1930 (0.6%) 12
Procedure Related Atrial Arrhythmia 3/1930 (0.2%) 3
Procedure Related Pericardial Effusion 3/1930 (0.2%) 3
Procedure Related Bleeding And/or Hemoptysis 2/1930 (0.1%) 2
Procedure Related Cardiac Vein Thrombus 2/1930 (0.1%) 2
Procedure Related Part of The Delivery Tool Was Left In The Coronary Sinus/ Ventricle 2/1930 (0.1%) 2
Procedure Related Pneumothorax/Hemothorax 2/1930 (0.1%) 2
Procedure Related Pulmonary Edema 2/1930 (0.1%) 2
Procedure Related Renal Failure or Injury 2/1930 (0.1%) 2
Procedure Related Acute Left Arm Thrombophlebitis 1/1930 (0.1%) 1
Procedure Related Cardiac/Coronary Sinus Perforation 1/1930 (0.1%) 1
Procedure Related Decompensated Heart Failure 1/1930 (0.1%) 1
Procedure Related Device Incision Erythema 1/1930 (0.1%) 1
Procedure Related Excessive Bleeding 1/1930 (0.1%) 1
Procedure Related Frozen Shoulder 1/1930 (0.1%) 1
Procedure Related High DFT's 1/1930 (0.1%) 1
Procedure Related Hypotension 1/1930 (0.1%) 1
Procedure Related Hypotension Requiring Medical Intervention During CRT-D Implant 1/1930 (0.1%) 1
Procedure Related Myocardial Infarction 1/1930 (0.1%) 1
Procedure Related Pericarditis 1/1930 (0.1%) 1
Other Pericardial Effusion 3/1930 (0.2%) 3
Other Induced Atrial or Ventricular Arrhythmias 2/1930 (0.1%) 2
Product Issues
LV Lead Elevated Pacing Thresholds 214/1930 (11.1%) 221
LV Loss of Capture 19/1930 (1%) 20
Abnormal LV Lead Pacing Impedance <= 200 Ω or >= 2000 Ω 16/1930 (0.8%) 17
LV Lead Insulation Damage 1/1930 (0.1%) 1
System/Pulse Generator Related Failed ICD Shock 1/1930 (0.1%) 1
System/Pulse Generator Related Pacemaker Mediated Tachycardia 1/1930 (0.1%) 1
RA Lead Related Oversensing 9/1930 (0.5%) 9
RA Lead Related Abnormal Lead Impedance 5/1930 (0.3%) 5
RA Lead Related Atrial Lead Noise 3/1930 (0.2%) 3
RA Lead Related Elevated Pacing Thresholds 3/1930 (0.2%) 3
RA Lead Related Lead Insulation Damage 3/1930 (0.2%) 3
RA Lead Related Loss of Capture 2/1930 (0.1%) 2
RA Lead Related Lead Fracture 1/1930 (0.1%) 1
RA Lead Related Undersensing 1/1930 (0.1%) 1
RV Lead Related Abnormal Lead Impedance 3/1930 (0.2%) 3
RV Lead Related Lead Insulation Damage 2/1930 (0.1%) 2
RV Lead Related Elevated Pacing Thresholds 1/1930 (0.1%) 1
RV Lead Related Lead Externalization 1/1930 (0.1%) 1
RV Lead Related Oversensing 1/1930 (0.1%) 1

Limitations/Caveats

[Not Specified]

More Information

Certain Agreements

Principal Investigators are NOT employed by the organization sponsoring the study.

There IS an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.

Results Point of Contact

Name/Title Clay Cohorn, Clinical Program Director
Organization Abbott
Phone 972-309-8087
Email clay.cohorn@abbott.com
Responsible Party:
Abbott Medical Devices
ClinicalTrials.gov Identifier:
NCT01179477
Other Study ID Numbers:
  • CRD561
First Posted:
Aug 11, 2010
Last Update Posted:
Aug 12, 2019
Last Verified:
Jul 1, 2019