COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu

Singapore Atrial Fibrillation Study (SAFS)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02791022
Recruitment Status : Unknown
Verified May 2016 by National Heart Centre Singapore.
Recruitment status was:  Recruiting
First Posted : June 6, 2016
Last Update Posted : June 6, 2016
Changi General Hospital
Singapore General Hospital
National University Hospital, Singapore
Information provided by (Responsible Party):
National Heart Centre Singapore

Brief Summary:
Atrial fibrillation is a common disease in the aging population that has severe implication if left untreated as it leads to embolic stroke and other embolic phenomenon. Embolic stroke in particular has severe implications to our community as the cost of care for such immobile patients can be extremely high. Atrial fibrillation typically begins as Paroxysmal atrial fibrillation (PAF), which makes early detection extremely difficult as the PAF may only occur transiently in the initial stages. Long term continuous ECG monitoring is currently required over weeks to detect early PAF. Current devices typically need to be implanted (loop recorders) to be sensitive enough to detect infrequent episodes of PAF. New generation ECG remote devices (non-invasive) are however now available that are wearable over long periods and can send data directly to a database for centralized collection and analysis of the data. The aim of this study will be to use such a device to evaluate the incidence of PAF in different population of patients, with each patient wearing and sending continuous ECG data for periods of a week or more to a central database, across several public hospitals in Singapore.

Condition or disease Intervention/treatment
Atrial Fibrillation Device: SPYDER ECG sensor

Detailed Description:

The implications of PAF detection in an individual are huge to the individual and the community as it increases the risk of embolic stroke and other embolic phenomenon. Once detected, intervention can be taken to lower such an individual's clinical risk and decrease the clinical burden to the community. The lack of suitable tools and large population cohorts has led to a likely underestimation of PAF in various patient populations. This study will specifically address and characterize the different incidence on PAF in various patient populations and hence help to target at risk groups for earlier screening and intervention.

Patients with HF are more likely than the general population to develop AF. Conversely AF is also a strong independent risk factor for subsequent development of HF.

In Heart Failure (HF) patients, later development of AF was associated with increased mortality. Preexisting HF adversely affected survival in individuals with AF. Both HF with reduced ejection fraction (HFrEF) and Heart Failure with a Preserved Ejection Fraction (HFpEF) patients are at greater risk for AF. There is a direct relationship between functional state (as shown by the NYHA class) and prevalence of AF in patients with HF progressing from 4% in those who are NYHA class I to 40% in those who are NYHA class IV.

Acute HF decompensation in patients with prior HF is due to AF as a precipitant in 5.4% of cases in a single center study.

Knowing the true prevalence of AF in HF will allow us to plan for strategies to further reduce the clinical burden of HF.

Layout table for study information
Study Type : Observational
Estimated Enrollment : 2500 participants
Observational Model: Case-Only
Time Perspective: Prospective
Official Title: A Multi-centre Population-based Study on the Incidence of Paroxysmal Atrial Fibrillation in Inpatient and Outpatient Cohorts in Singapore
Study Start Date : March 2016
Estimated Primary Completion Date : March 2019

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Paroxysmal Atrial Fibrillation [ Time Frame: 1 year ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   21 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

Study population is 2500 inpatients and outpatients recruited from 4 medical institutions over a period of 3 years

Power Calculation: This is a pilot study exploring the utility of employing a wearable device to detect the prevalence of PAF in the study populations.


Inclusion Criteria:

  1. Any male or female patient aged 21 years until 80 years old.
  2. Not diagnosed to have atrial fibrillation
  3. Patient must have sinus rhythm on 12 lead ECG prior to recruitment
  4. Patient must be living in Singapore.
  5. Ability to provide informed consent.
  6. . Fulfill one or more of the risk factors stated below:

i) Hypertension

ii) Coronary arterial disease

iii) Ischemic heart disease

iv) Past history of congestive cardiac failure

v) Cerebrovascular accident

vi) Diabetes mellitus

Exclusion Criteria:

  1. Known atrial fibrillation
  2. Unable to use and manage a smartphone
  3. Skin allergy to adhesive tape or plaster
  4. Skin too hairy to apply device adhesive tape
  5. Unable to comply with investigator's instructions and study protocols.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02791022

Layout table for location contacts
Contact: Hanna Liaw 67042274

Layout table for location information
National Heart Centre Singapore Recruiting
Singapore, Singapore, 169609
Contact: Hanna Liaw    67042274   
Principal Investigator: Chi Keong Ching         
Sponsors and Collaborators
National Heart Centre Singapore
Changi General Hospital
Singapore General Hospital
National University Hospital, Singapore
Layout table for investigator information
Principal Investigator: Chi Keong Ching Singhealth Foundation
Layout table for additonal information
Responsible Party: National Heart Centre Singapore Identifier: NCT02791022    
Other Study ID Numbers: 2015/2309
First Posted: June 6, 2016    Key Record Dates
Last Update Posted: June 6, 2016
Last Verified: May 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Additional relevant MeSH terms:
Layout table for MeSH terms
Atrial Fibrillation
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Pathologic Processes