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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/show/NCT04595305

Registration number
Ethics application status
Date submitted
Date registered
Date last updated

Titles & IDs
Public title
Septal Mapping And Resynchronisation Therapy- (SMART) Study
Scientific title
Septal Mapping And Resynchronisation Therapy- (SMART) Study
Secondary ID [1] 0 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Cardiac Resynchronization Therapy 0 0
Heart Failure 0 0
Condition category
Condition code
Cardiovascular 0 0 0 0
Coronary heart disease
Cardiovascular 0 0 0 0
Other cardiovascular diseases

Study type
Description of intervention(s) / exposure
Treatment: Devices - Cardiac resynchronization therapy by CRT-P or CRT-D implantation

Other: Treatment Arm - Standard of Care - Implantation of CRT-P or CRT-D for a clinical indication as per standard of care.

Treatment: Devices: Cardiac resynchronization therapy by CRT-P or CRT-D implantation
Clinically indicated implantation of a CRT-P or CRT-D device as per standard of care

Intervention code [1] 0 0
Treatment: Devices
Comparator / control treatment
Control group

Primary outcome [1] 0 0
Quantification of activation times (ms) of the RV and LV septum - Different pacing configurations such as LV-only pacing, biventricular pacing, and multipoint pacing will be used to quantify LV and RV septal activation time (ms).
Timepoint [1] 0 0
During implant procedure
Secondary outcome [1] 0 0
Quantification of the correlation coefficient relating changes in end-systolic volume (%) to the following variables: septal activation time (ms), septal scarring (% area), and ECG QRS duration (ms). - End-systolic volume (mL), which is an essential marker of cardiac function, may be dependent on septal activation time (ms), septal scarring (% area), and ECG QRS duration (ms). To test these relations, the correlation between changes in end-systolic volume in response to CRT and the aforementioned parameters will be assessed.
Timepoint [1] 0 0
12 months post-implant

Key inclusion criteria
- Subjects are 18 years of age or older, or of legal age to give informed consent
specific to state and national law

- Subject must provide written informed consent prior to any clinical investigation
related procedure

- Subjects who are undergoing implantation of an Abbott CRT-P or CRT-D device under
standard indications

- Subjects are treated with optimal pharmacological therapy (as determined by the site
principle investigator) for a minimum 4 weeks prior to procedure

- ECG showing Sinus Rhythm (SR)

- LBBB morphology with QRS duration >130ms

- Subject should be willing and able to comply with the prescribed follow-up schedule of

- Female subjects of child-bearing potential should have a negative pregnancy test done
within 7 days prior to the index procedure per site standard test.
Minimum age
18 Years
Maximum age
No limit
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
- Subjects with a life expectancy less than the duration of the study

- Subjects with medical conditions that preclude the testing required for all patients
by the study protocol or that otherwise limit study participation required for all

- Subjects with mechanical tricuspid or aortic heart valves

- Inaccessibility for follow-up at the study centre

- Unwillingness or inability to provide written informed consent

- Enrollment in, or intention to participate in, another clinical study during the
course of this study excluding a registry

- Pregnant or nursing subjects and those who plan pregnancy during the clinical
investigation follow-up period

Study design
Purpose of the study
Allocation to intervention
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?

Intervention assignment
Single group
Other design features
Not Applicable
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)
Recruitment hospital [1] 0 0
Abbott Medical Australia Pty Ltd - Macquarie Park
Recruitment postcode(s) [1] 0 0
2113 - Macquarie Park

Funding & Sponsors
Primary sponsor type
Commercial sector/Industry
Abbott Medical Devices

Ethics approval
Ethics application status

Brief summary
Normal heart function involves rhythmic contraction of all four chambers of the heart and
this rhythm is maintained by the electrical wiring (conduction system) of the heart.
Abnormality in this system results in either very slow or very fast heart rates leading to
insufficient blood supply to the body due to inefficient pumping of the heart. cardiac
resynchronization therapy pacemaker and cardiac resynchronization therapy defibrillator
devices are used to synchronise heart function. The purpose of this study is not only to
determine the pattern of electrical wiring of the heart and identify the variations seen in
individuals with heart failure, but also, to explore the benefits of different types of
pacing using CRT devices.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 0 0
David O'Donnell, MD, FRACP
Address 0 0
Fundacion GenesisCare
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Sinny Delacroix, MD, PhD
Address 0 0
Country 0 0
Phone 0 0
+61 (8) 82026651
Fax 0 0
Email 0 0
Contact person for scientific queries

Summary results
For IPD and results data, please see https://clinicaltrials.gov/show/NCT04595305