Left Ventricular Septum Pacing in Patients by Transvenous Approach Through the Inter-ventricular Septum

Condition(s) targeted: Left Ventricular Dysfunction; Cardiac Conduction Defect; Heart Failure; Sick Sinus Syndrome

Intervention: Left ventricular septum pacing lead (Device)

Phase: Phase 1/Phase 2

Status: Recruiting

Sponsored by: Maastricht University Medical Center

Official(s) and/or principal investigator(s):
Frits Prinzen, PhD, Principal Investigator, Affiliation: Maastricht University
Kevin Vernooy, MD, PhD, Study Director, Affiliation: Maastricht University Medical Centre

Overall contact:
Masih Mafi Rad, MD, Phone: +31-43-3871613, Email: masih.mafirad@mumc.nl

Cardiac pacing is the only effective treatment for symptomatic bradycardia. The right ventricular apex (RVA) has become the most frequently used ventricular pacing site. However, RVA pacing has been shown to cause left ventricular (LV) dyssynchrony wich can lead to LV dysfunction and development of heart failure. Recent studies in animals have demonstrated that pacing at the LV septum induces significantly less ventricular dyssynchrony than RVA pacing and is able to improve LV function to a similar degree as biventricular (BiV) pacing. In addition it was shown that a LV septum lead can be placed permanently by driving a lead with extended helix from the RV side through the inter-ventricular septum into the LV endocardial layer. This was shown to be a feasible and safe procedure and lead stability was shown during four months of follow-up in otherwise healthy and active canines. LV septum pacing may therefore be a good treatment alternative in patients with symptomatic bradycardia, as well as patients with an indication for cardiac resynchronization therapy (CRT). The purpose of this study is to translate the findings from preclinical studies to the clinical situation by investigating the feasibility, long-term lead stability and safety of LV septum pacing by transvenous approach through the inter-ventricular septum in patients.

Official title: Left Ventricular Septum Pacing in Patients by Transvenous Approach Through the Inter-ventricular Septum - Feasibility, Long-term Lead Stability and Safety

Study design: Observational Model: Cohort, Time Perspective: Prospective

Primary outcome:

Number of successful LV septum lead implantations

Change in sensing values, pacing threshold and lead impedance

Number of participants with procedure or lead related adverse events

Secondary outcome:

Acute change in LVdP/dtmax

Acute change in LV stroke volume

Acute change in QRS duration

Acute change in 3-dimensional QRS vector direction

Acute change in SPECKLE-tracking strain

Difference between relative changes in LV stroke volume assessed by Nexfin and relative changes in invasively measured LVdp/dtmax.

Detailed description: Cardiac pacing is the only effective treatment for symptomatic bradycardia. After the introduction of the implantable pacemaker (PM), the right ventricular apex (RVA) has become the most frequently used ventricular pacing site. However, clinical studies have shown that RVA pacing leads to left ventricular (LV) dyssynchrony, and on the long run to adverse structural changes (remodeling), a higher risk of developing atrial fibrillation and heart failure, and higher mortality. Recognition of the adverse effects of RVA pacing has generated interest in alternative ventricular pacing sites. Recent studies in animals have shown that pacing at the LV septum induces significantly less ventricular dyssynchrony than RVA pacing. In addition it was shown that a LV septum lead can be placed permanently by introducing a custom lead with extended helix transvenously and, after positioning it against the RV septum, driving it through the inter-ventricular septum into the LV endocardial layer. This was shown to be a feasible and safe procedure and lead stability was shown during four months of follow-up in otherwise healthy and active canines. Animal studies have also shown that LV septum pacing is able to improve LV function to a similar degree as simultaneous biventricular (BiV) pacing used in cardiac resynchronization therapy (CRT). CRT was introduced to restore the abnormal ventricular activation and contraction in patients with heart failure and intra-ventricular conduction delay. Large clinical trials have shown that CRT improves LV systolic pump function, reverses structural remodelling, improves quality of life and exercise tolerance, and decreases mortality. Unfortunately, problems encountered during positioning and fixation of the LV pacing lead in the coronary vein result in suboptimal or loss of CRT in at least a quarter of CRT candidates and require re-operation in 7% during follow up. The adverse effects of RVA pacing, the limitations of BiV pacing and the promising effects of LV septum pacing in preclinical studies have led to the idea that LV septum pacing may be a good treatment alternative in patients with symptomatic bradycardia, as well as patients with an indication for CRT. In the latter category, CRT could then be performed using a single ventricular pacing lead, thus limiting the number of lead implantations, and thereby reducing complication rate and implantation costs as well as avoiding the difficult access route through the coronary vein. It is the aim of this study to translate the findings from preclinical studies to the clinical situation by investigating the feasibility, long-term lead stability and safety of LV septum pacing by transvenous approach through the inter-ventricular septum in patients with a PM or CRT indication. The results may have a large impact on future pacing therapy. The LV septum may become the universal pacing site, being preferred for anti-bradycardia therapy, and being an equal alternative for BiV pacing, but easier to apply, less invasive and more cost-effective.

Minimum age: 18 Years. Maximum age: 75 Years. Gender(s): Both.

Criteria:

Inclusion Criteria: 1. Cardiac pacing indication for sinus node dysfunction (dual chamber pacemaker) or indication for CRT (BiV pacemaker).

- Patient with sinus node dysfunction:

- Normal left ventricular ejection fraction (LVEF > 50%)

- Left ventricular end-diastolic diameter (LVEDD) < 55mm

- QRS duration < 100ms

- Patient with CRT indication:

- Non-ischemic cardiomyopathy

- LVEF is < 35%

- Typical left bundle-branch block on surface ECG

- QRS duration >150ms

- NYHA functional class I-III

2. Greater than 18 years of age 3. Stable sinus rhythm at the time of inclusion 4. Willing and capable of giving informed consent Exclusion Criteria: 1. Ventricular pacing dependent 2. High degree AV block 3. Previous septal myocardial infarction 4. Previously implanted pacing device 5. Abnormal venous anatomy 6. Left ventricular septum wall thickness >10mm determined by echocardiography 7. Presence of severe valvular disease 8. Presence of an ongoing progressive terminal disease associated with a reduced likelihood of survival for the duration of the study

Masih Mafi Rad, MD, Phone: +31-43-3871613, Email: masih.mafirad@mumc.nl

Maastricht University Medical Centre, Maastricht, Limburg 6202 AZ, Netherlands; Recruiting
Masih Mafi Rad, MD, Phone: +31-43-3871613, Email: masih.mafirad@mumc.nl
Kevin Vernooy, MD, PhD, Phone: +31-43-3877095, Email: kevin.vernooy@mumc.nl
Masih Mafi Rad, MD, Sub-Investigator

Related publications:

Mills RW, Cornelussen RN, Mulligan LJ, Strik M, Rademakers LM, Skadsberg ND, van Hunnik A, Kuiper M, Lampert A, Delhaas T, Prinzen FW. Left ventricular septal and left ventricular apical pacing chronically maintain cardiac contractile coordination, pump function and efficiency. Circ Arrhythm Electrophysiol. 2009 Oct;2(5):571-9. doi: 10.1161/CIRCEP.109.882910. Epub 2009 Aug 25. Erratum in: Circ Arrhythm Electrophysiol. 2009 Dec;2(6):e47-8.

Peschar M, de Swart H, Michels KJ, Reneman RS, Prinzen FW. Left ventricular septal and apex pacing for optimal pump function in canine hearts. J Am Coll Cardiol. 2003 Apr 2;41(7):1218-26.

Grosfeld MJ, Res JC, Vos DH, de Boer TJ, Bos HJ. Testing a new mechanism for left interventricular septal pacing: the transseptal route; a feasibility and safety study. Europace. 2002 Oct;4(4):439-44.

Andersen HR, Nielsen JC, Thomsen PE, Thuesen L, Mortensen PT, Vesterlund T, Pedersen AK. Long-term follow-up of patients from a randomised trial of atrial versus ventricular pacing for sick-sinus syndrome. Lancet. 1997 Oct 25;350(9086):1210-6.

Wilkoff BL, Cook JR, Epstein AE, Greene HL, Hallstrom AP, Hsia H, Kutalek SP, Sharma A; Dual Chamber and VVI Implantable Defibrillator Trial Investigators. Dual-chamber pacing or ventricular backup pacing in patients with an implantable defibrillator: the Dual Chamber and VVI Implantable Defibrillator (DAVID) Trial. JAMA. 2002 Dec 25;288(24):3115-23.

Sweeney MO, Hellkamp AS, Ellenbogen KA, Greenspon AJ, Freedman RA, Lee KL, Lamas GA; MOde Selection Trial Investigators. Adverse effect of ventricular pacing on heart failure and atrial fibrillation among patients with normal baseline QRS duration in a clinical trial of pacemaker therapy for sinus node dysfunction. Circulation. 2003 Jun 17;107(23):2932-7. Epub 2003 Jun 2.

Lamas GA, Lee KL, Sweeney MO, Silverman R, Leon A, Yee R, Marinchak RA, Flaker G, Schron E, Orav EJ, Hellkamp AS, Greer S, McAnulty J, Ellenbogen K, Ehlert F, Freedman RA, Estes NA 3rd, Greenspon A, Goldman L; Mode Selection Trial in Sinus-Node Dysfunction. Ventricular pacing or dual-chamber pacing for sinus-node dysfunction. N Engl J Med. 2002 Jun 13;346(24):1854-62.

Steinberg JS, Fischer A, Wang P, Schuger C, Daubert J, McNitt S, Andrews M, Brown M, Hall WJ, Zareba W, Moss AJ; MADIT II Investigators. The clinical implications of cumulative right ventricular pacing in the multicenter automatic defibrillator trial II. J Cardiovasc Electrophysiol. 2005 Apr;16(4):359-65.

Auricchio A, Stellbrink C, Block M, Sack S, Vogt J, Bakker P, Klein H, Kramer A, Ding J, Salo R, Tockman B, Pochet T, Spinelli J. Effect of pacing chamber and atrioventricular delay on acute systolic function of paced patients with congestive heart failure. The Pacing Therapies for Congestive Heart Failure Study Group. The Guidant Congestive Heart Failure Research Group. Circulation. 1999 Jun 15;99(23):2993-3001.

Wecke L, Rubulis A, Lundahl G, Rosen MR, Bergfeldt L. Right ventricular pacing-induced electrophysiological remodeling in the human heart and its relationship to cardiac memory. Heart Rhythm. 2007 Dec;4(12):1477-86. Epub 2007 Aug 11.

Starting date: November 2012
Last updated: April 9, 2015