Seoul National University Hospital
Seoul, Jongno-gu, 03080, South Korea
Location status: Recruiting
Recruiting
NCT Number: NCT06148571
Left Bundle Branch Area Pacing in Heart Failure Patients With Ejection Fraction Below Normal
While cardiac resynchronization therapy remains the mainstay for advanced HF, it is not always feasible due to unfavorable anatomy of coronary sinus or pacing characteristics. In such cases, left bundle branch area pacing itself or left bundle optimized cardiac resynchronization therapy could be a rescue therapy for failed or unsuccessful biventricular cardiac resynchronization therapy. However, the efficacy and safety of left bundle branch area pacing (or left bundle optimized cardiac resynchronization therapy) as rescue therapy for biventricular cardiac resynchronization therapy is largely hypothetic and lack concrete evidence still.
Therefore, there is an unmet need for the registry purposed for left bundle branch area pacing among heart failure with mid-range (or mildly reduced) ejection fraction and heart failure with reduced ejection fraction patients to investigate its efficacy and safety.
This study aims to investigate the efficacy and safety of left bundle branch area pacing in heart failure patients with ejection fraction below normal using Selectra catheters.
Recruiting
Interested in participating?
Request InfoKey information
Age range
19 year and older
Sex eligibility
All sexes
Study type
Observational
Primary location
Who can participate
Healthy volunteers accepted: No
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
- Patients previously diagnosed with heart failure with mid-range(or mildly reduced) ejection fraction and heart failure with reduced ejection fraction, which was documented by an appropriate echocardiographic study (Left ventricle ejection fraction <50%), and
- Patients with indications of cardiac pacing or cardiac resynchronization therapy
Exclusion criteria
- Patients aged less than 19 years.
- Pregnant.
- Patients with an expected life expectancy of less than 1 year.
- Patients with a mechanical valve for the tricuspid valve.
- Patients who need atrial pacing only.
- Patients who are not capable of receiving a transvenous pacemaker for any reason.
Treatment and study plan
Left Bundle Branch Area Pacing
Deviceleft bundle branch area pacing locates ventricular lead into the interventricular septum to capture left bundle branch areas.
Primary outcomes
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The acute success rate of left bundle branch area pacing
Time frame: The day of the procedure
The acute success of left bundle branch area pacing was defined as below:
Meet ≥2 criteria as follows evaluated at the end of the procedure.
- Right bundle branch block configuration observed during unipolar tip pacing
- Left bundle branch potential (Left bundle branch-Ventricular interval of 15 to 35ms)
- Transition from nonselective Left bundle branch capture to selective Left bundle branch capture
- Transition from nonselective Left bundle branch capture to left septal capture at near threshold outputs
- Short and constant peak left ventricular activation time (stimulus to peak of the R wave in V5 or V6 [peak left ventricle activation time]) <75ms in non-Left bundle branch block and <85ms in Left bundle branch block
Programmed (extra-stimulus testing) deep septal stimulation to differentiate left ventricular septal vs nonselective Left bundle branch capture
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Acute complications related to the procedures
Time frame: 7 days from the procedure
- Death related to the procedure
- Vascular complications (pocket hematoma, pseudoaneurysm, fistular, rupture)
- Device-related infection
- Cardiac perforation or tamponade
- Septal perforation
- Acute coronary syndrome
- Pneumothorax, hemothorax
- Thromboembolic events (stroke, pulmonary thromboembolism)
- Lead dislodgment
Secondary outcomes
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The incidence of acute procedure-related complication
Time frame: 1 year
The acute procedure-related complication was defined as the occurrence of the below-listed events within 7 days of the procedure.
(Death related to the procedure, Pocket hematoma, Pseudoaneurysm, Fistular, Vascular rupture, Device-related infection, Cardiac perforation, Cardiac tamponade, Septal perforation, Acute coronary syndrome, Pneumothorax, Hemothorax, Stroke, Pulmonary thromboembolism, Lead dislodgement)
-
The incidence of repeat procedures
Time frame: 1 year
The incidence of repeat left bundle branch area pacing procedures
-
The incidence of pacemaker upgrade to cardiac resynchronization therapy including biventricular cardiac pacing
Time frame: 1 year
The incidence of pacemaker upgrade to cardiac resynchronization therapy including biventricular cardiac pacing
-
The incidence of heart failure hospitalization
Time frame: 1 year
The incidence of heart failure hospitalization
-
The incidence of cardiovascular death
Time frame: 1 year
The incidence of cardiovascular death
-
The incidence of All-cause death
Time frame: 1 year
The incidence of All-cause death
-
Left ventricular ejection fraction
Time frame: 1 year
Left ventricular ejection fraction (%)
-
Left ventricular end diastolic diameter
Time frame: 1 year
Left ventricular end diastolic diameter (mm)
-
Left ventricular end systolic diameter
Time frame: 1 year
Left ventricular end systolic diameter (mm)
-
left ventricular global strain
Time frame: 1 year
left ventricular global strain (%) if possible.
-
Capture threshold
Time frame: 1 year
Left bundle branch area pacing lead parameter: capture threshold (V)
-
Sensing
Time frame: 1 year
Left bundle branch area pacing lead parameter: sensing (mV)
-
Impedance
Time frame: 1 year
Left bundle branch area pacing lead parameter: impedance (Ohms)
Study contacts
Contact information is provided by the study sponsor or research team.
Sponsors and collaborators
Lead sponsor
Seoul National University Hospital
Other
Registry information
Important dates
- Study start
- 2023
- Primary completion
- 2026
- Study completion
- 2026
- First posted
- Nov 28, 2023
- Registry last updated
- May 19, 2026
OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.
View the official ClinicalTrials.gov record (opens in a new tab)This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.
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