Application of Right Atrial Left Ventricular Fusion Pacing in Patients With CRT Indications

Heart Failure Clinical Trial

Official title:

Application of Right Atrial Left Ventricular Fusion Pacing in Patients With CRT (Cardiac Resynchronization Therapy) Indications

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03071978
• Other study ID #: LV Study
• Status: Completed
• Phase: N/A
• Start date: April 13, 2017
• Est. completion date: January 29, 2019

Study information

• Verified date: February 2020
• Source: Medtronic Cardiac Rhythm and Heart Failure
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This study is designed to assess the clinical outcomes of Left-Ventricular (LV) fusion pacing compared to Bi-Ventricular (BV) pacing, also known as Cardiac Resynchronization Therapy (CRT), in Chinese Heart Failure (HF) population. Specifically, the study will assess the changes of cardiac function of each group through 3-month follow up/ 6-month follow up compared with original outcomes before aCRT (adaptive Cardiac Resynchronization Therapy) implantation. Secondly, the study will assess whether parameters of aCRT that were tested in Western population are relevant to parameters of Chinese HF patients.

Description:

Traditional dual-chamber pacemakers usually utilize pacing at right atrium (RA) and right ventricle (RV). But many clinical studies have proved that permanent RV pacing could cause ventricular desynchronization in electrical activation and mechanical movement, also may lead to atrial fibrillation and cardiac failure in the long term. Cardiac Resynchronization Therapy (CRT) can overcome the ventricular desynchrony caused by permanent RV pacing, through pacing both left and right ventricles. But the cost of CRT device is usually expensive in emerging markets like in China. Recently, a few clinical studies have demonstrated that LV-fusion pacing (without RV pacing) using adaptive CRT feature provides better clinical outcomes than RV pacing, and also equivalent clinical improvements compared to conventional CRT pacing. However, it is unknown whether similar results can be duplicated in Chinese population as the clinical profile of Chinese CRT populations is different from that of Western CRT population.

This study is designed to assess the clinical outcomes of Left-Ventricular (LV) fusion pacing compared to Bi-Ventricular (BV) pacing in Chinese Heart Failure population. Specifically, the study will assess the changes of cardiac function of each group through 3-month follow up/ 6-month follow up compared with original outcomes before aCRT implantation. Secondly, the study will assess whether parameters of aCRT that were tested in Western population are relevant to parameters of Chinese HF patients.

CRT-indicated heart failure patients who meet the Inclusion & Exclusion criteria will be enrolled voluntarily in this study. No intervention will be assigned to enrolled patients. CRT therapy will be assigned according to the Guideline (ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure 2012). Left-Ventricular (LV) fusion pacing or Bi-Ventricular (BV) pacing mode, both included in CRT therapy, will be applied upon physicians' judgment based on the Guideline and patients' specific situations. Both pacing modes, as well as all the clinical assessments in this study, are routine cares in clinical practice.

The study will enroll up to 30 subjects in each group (LV pacing group and BV pacing group) that meet the indication for CRT therapy, and also the Inclusion & Exclusion criteria. Consented subjects will receive CRT therapy and two follow-ups in the following 3 and 6 months.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 63
• Est. completion date: January 29, 2019
• Est. primary completion date: January 8, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 80 Years

Eligibility

Inclusion Criteria:

• Age between 18~80

• Life expectancy > 1 year

• Sign Informed Consent

• CRT-indicated

• NYHA (New York Heart Association) class II and III

• PR (term in Electrocardiograph) interval < 200 ms

• ECG (Electrocardiograph) LBBB (left bundle branch block)

Exclusion Criteria:

• Patient with severe liver or kidney dysfunction

• CRT-contraindication

• CRT-upgraded

• Persistent AF (atrial fibrillation)

• AV block (atrioventricular block)

• RBBB (right bundle branch block)

• Valvular Disease

• LV threshold = 3.5 volt

• Patient is unwilling to sign the informed consent

• Patient is pregnant or has pregnancy intention in the study duration

• Patient has a medical condition that would limit study participation

• Patient is enrolled in a concurrent study that may affect the outcome of this study

Related Conditions & MeSH terms

• Heart Failure

Intervention

Device:
• CRT with LV-only pacing / bi-ventricular pacing
LV-fusion pacing group received cardiac resynchronization therapy with adaptive algorithm and disabled RV pacing. While BV pacing group received conventional cardiac resynchronization therapy without adaptive algorithm.

Locations

Country	Name	City	State
China	Fuwai Hospital	Beijing	Beijing
China	Greentown Hospital	Hangzhou	Zhejiang
China	Jiangsu Province Hospital	Nanjing	Jiangsu
China	Zhongshan Hospital	Shanghai	Shanghai
China	First Affiliated Hospital of Xinjiang Medical University	Urumqi	Xinjiang

Sponsors (1)

Lead Sponsor	Collaborator
Medtronic Cardiac Rhythm and Heart Failure

Country where clinical trial is conducted

China, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Left Ventricular Ejection Fraction (LVEF)	Change of Left Ventricular Ejection Fraction (LVEF) from Baseline to 6-month follow-up	6-month follow up after CRT implantation
Secondary	New York Heart Association (NYHA) class	Change of New York Heart Association (NYHA) class from Baseline to 6-month follow-up	6-month follow up after CRT implantation
Secondary	6-minute walking distance (6MWD)	Change of 6-minute walking distance (6MWD) from Baseline to 6-month follow-up	6-month follow up after CRT implantation
Secondary	ECG QRS duration	Change of ECG QRS duration from Baseline to 6-month follow-up	6-month follow up after CRT implantation
Secondary	echocardiographic assessments (including LVESV, LVEDV, LVESD, LVEDD)	Change of echocardiographic assessments (including LVESV, LVEDV, LVESD, LVEDD) from Baseline to 6-month follow-up	6-month follow up after CRT implantation