- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04317521
: A Prospective Study Investigating the Use of the Eko CORE and Eko DUO Electronic Stethoscopes in Pediatric Patients.
A Prospective Study Investigating the Use of the Eko CORE and Eko DUO Electronic Stethoscopes for Differentiation of Innocent vs. Pathologic Murmurs in Pediatric Patients.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
It is estimated that 50-70% of all children will have had a detectable heart murmur at some point in early life, but fortunately, the vast majority of these murmurs are benign asymptomatic "innocent" murmurs and not indicative of heart disease. However, there is concern about the ability of front-line pediatricians and family providers to distinguish between an innocent and pathological murmur. Thus, it is of no surprise that the largest number of new patient referrals to pediatric cardiologists is due to the detection of a murmur. Of those referred, 20-30% are typically diagnosed with trivial to significant heart disease based on auscultation and confirmatory echocardiography follow-up when necessary.
Having a child referred for a heart murmur evaluation causes significant anxiety for parents, even if the murmur is suggested to be innocent by the pediatrician and in some cases, clinical diagnostic testing is done unnecessarily. Interestingly, studies have shown that performing diagnostic electrocardiography, chest radiography, or echocardiography prior to clinical assessment by pediatric cardiologists did not offer additional assistance in differentiating murmurs. Unnecessary echocardiograms or other diagnostic tests for innocent murmur evaluation add unnecessary cost to the healthcare system.
Unfortunately, the unnecessary use of echocardiography for the diagnosis of innocent murmurs is also high among pediatric cardiologists. Thus, with the rising cost of health care, it is essential that we identify and target areas of practice that will enable us to increase efficiency and reduce unnecessary costs.
Specific characteristics of the sound of the murmur may help differentiate innocent from other murmurs, so improving auscultation skills and diagnosis based on auscultation and electrocardiography is very important in accurate diagnosis and reducing cost associated with the diagnosis of innocent and pathologic heart murmurs in children. The use of new technologies to improve auscultation and auscultation-based diagnosis could lead to improved diagnoses with decreased cost. New systems that used telemedicine techniques to transfer phonocardiogram (PCG) recordings to a cloud server have shown benefit in differentiating innocent versus pathologic murmurs, but cannot be used large scale, and are based on cardiology involvement.
The FDA-cleared Eko CORE device (Eko, Berkeley, California, USA) is a digital stethoscope that allows recording of the audio to produce a PCG. The FDA-cleared Eko DUO device is a digital stethoscope that allows recording of the audio to produce a PCG combined with a single lead electrocardiograph. The CORE and DUO both feature sound amplification and audio transmission to a smart phone, laptop or tablet via Bluetooth® that allows the user to open and playback sounds using an iOS, Android, or Microsoft Windows compatible application. The App provides the ability to save sounds within select Electronic Health Record (EHR) systems, share patient recordings with other practitioners, and annotate notes on recorded audio. Eko is intended for use on pediatric and adult patients. These features uniquely situate this device to accumulate large sets of auscultatory data on patients both with and without congenital heart disease (CHD).
In this study, we seek to use auscultatory audio recordings and phonocardiograms collected from pediatric patients using Eko CORE and DUO digital stethoscopes to develop a clinically significant algorithm that differentiates innocent from pathologic heart murmurs. As the Eko CORE and DUO devices are similar to a traditional stethoscope, an iconic tool widely accepted by patients and providers alike, its use to drive an automated detection algorithm is both feasible and attractive as a substitute for traditional auscultation. Furthermore, by providing an algorithmic analysis that can supplement clinical acumen, we hypothesize that we will improve overall diagnostic accuracy and show a decreased need for referral echocardiograms for innocent murmurs.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Delaware
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Wilmington, Delaware, United States, 19803
- Nemours Alfred I duPont Hospital for Children
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Patients aged 0 to 17 years, who are able to read and speak English, and/or with parents or legal guardians who are able to read and speak English
- New patients referred to the Nemours Cardiac Center for a heart murmur, chest pain, syncope, or arrhythmia. This could include children with suspected murmurs (but ultimately found to have no murmur by a cardiologist), innocent murmurs, and pathologic murmurs.
- Patients with previously diagnosed heart condition, if they have not had any corrective surgeries and had a detectable murmur at their last clinic visit (for pathological and innocent murmurs) or had no detectable murmur at their last clinic visit (for no murmurs).
Exclusion Criteria:
- Patients aged 18 and over
- Patients and/or parents who are unable to read or speak English
- Patients who have had corrective heart surgery for a heart defect
- Auscultation cannot be performed properly at all locations
- Patients not wishing to participate in study recordings
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Prospective
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Comparison of stethoscope recordings between innocent, pathologic and none to determine if stethoscope can differentiate
Time Frame: Recording 2 minutes of heart sounds for each stethoscope
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The data science team will generate ROC curves for algorithm scores in the set of recorded heart sounds. Exploratory descriptive analyses of the algorithm will be performed by identifying clinical correlates to the characteristics most heavily weighted in detecting a pathologic murmur. The likelihood ratios of the test at sensitivity cut offs of 0.90, 0.95, 0.99 will also be determined. Patients will also be stratified based on age as a secondary outcome: For example, infants (0<1 years of age, since murmurs in this age group are more likely to be pathologic), young children (1-5 years of age), children (>5-12 years of age) and adolescents (>12 to<18 years of age). Murmurs will be classified as none, innocent [defined as no significant heart disease on echocardiogram and further classified as Still's, pulmonary flow murmur, systemic flow murmur, venous hums by the physician], or pathological by disease type (e.g., atrial septal defect (ASD), ventricular septal defect (VSD), etc. |
Recording 2 minutes of heart sounds for each stethoscope
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Murmurs identified by stethoscope recording will be stratified based on age
Time Frame: 2 minutes of recording with two stethoscopes
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Differentiated murmurs of infants between 0-1 years, young children, ages 1-5 years, children ages >5-12 years and adolescents >12 years < 18 years will be evaluated and murmurs identified
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2 minutes of recording with two stethoscopes
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Nicholas Slamon, MD, Nemours/Alfred I DuPont Hospital for Children
Publications and helpful links
General Publications
- Hajian-Tilaki K. Sample size estimation in diagnostic test studies of biomedical informatics. J Biomed Inform. 2014 Apr;48:193-204. doi: 10.1016/j.jbi.2014.02.013. Epub 2014 Feb 26.
- Rose-Felker K, Kelleman MS, Campbell RM, Oster ME, Sachdeva R. Appropriate Use and Clinical Impact of Echocardiographic "Evaluation of Murmur" in Pediatric Patients. Congenit Heart Dis. 2016 Dec;11(6):721-726. doi: 10.1111/chd.12379. Epub 2016 Jun 10.
- Sachdeva R, Allen J, Benavidez OJ, Campbell RM, Douglas PS, Eidem BW, Gold L, Kelleman MS, Lopez L, McCracken CE, Stern KW, Weiner RB, Welch E, Lai WW. Pediatric Appropriate Use Criteria Implementation Project: A Multicenter Outpatient Echocardiography Quality Initiative. J Am Coll Cardiol. 2015 Sep 8;66(10):1132-40. doi: 10.1016/j.jacc.2015.06.1327. Erratum In: J Am Coll Cardiol. 2016 Apr 5;67(13):1660.
- Rose-Felker K, Kelleman MS, Campbell RM, Sachdeva R. Appropriateness of Outpatient Echocardiograms Ordered by Pediatric Cardiologists or Other Clinicians. J Pediatr. 2017 May;184:137-142. doi: 10.1016/j.jpeds.2017.01.073. Epub 2017 Feb 24.
- Kourtidou S, Evers PD, Jorgensen NW, Kronmal RA, Lewin MB, Schultz AH. Pediatric Appropriate Use Criteria for Outpatient Echocardiography: Practice Variations among Pediatric Cardiologists, Noncardiologist Subspecialists, and Primary Care Providers. J Am Soc Echocardiogr. 2017 Dec;30(12):1214-1224. doi: 10.1016/j.echo.2017.08.014. Epub 2017 Nov 1. Erratum In: J Am Soc Echocardiogr. 2018 Jan;31(1):115.
- Yi MS, Kimball TR, Tsevat J, Mrus JM, Kotagal UR. Evaluation of heart murmurs in children: cost-effectiveness and practical implications. J Pediatr. 2002 Oct;141(4):504-11. doi: 10.1067/mpd.2002.127502.
- Pyles L, Hemmati P, Pan J, Yu X, Liu K, Wang J, Tsakistos A, Zheleva B, Shao W, Ni Q. Initial Field Test of a Cloud-Based Cardiac Auscultation System to Determine Murmur Etiology in Rural China. Pediatr Cardiol. 2017 Apr;38(4):656-662. doi: 10.1007/s00246-016-1563-8. Epub 2017 Feb 2.
- Gardezi SKM, Myerson SG, Chambers J, Coffey S, d'Arcy J, Hobbs FDR, Holt J, Kennedy A, Loudon M, Prendergast A, Prothero A, Wilson J, Prendergast BD. Cardiac auscultation poorly predicts the presence of valvular heart disease in asymptomatic primary care patients. Heart. 2018 Nov;104(22):1832-1835. doi: 10.1136/heartjnl-2018-313082. Epub 2018 May 24.
- Chambers J, Kabir S, Cajeat E. Detection of heart disease by open access echocardiography: a retrospective analysis of general practice referrals. Br J Gen Pract. 2014 Feb;64(619):e105-11. doi: 10.3399/bjgp14X677167.
- Danford DA, Nasir A, Gumbiner C. Cost assessment of the evaluation of heart murmurs in children. Pediatrics. 1993 Feb;91(2):365-8.
- McCrindle BW, Shaffer KM, Kan JS, Zahka KG, Rowe SA, Kidd L. Cardinal clinical signs in the differentiation of heart murmurs in children. Arch Pediatr Adolesc Med. 1996 Feb;150(2):169-74. doi: 10.1001/archpedi.1996.02170270051007.
- Mackie AS, Jutras LC, Dancea AB, Rohlicek CV, Platt R, Beland MJ. Can cardiologists distinguish innocent from pathologic murmurs in neonates? J Pediatr. 2009 Jan;154(1):50-54.e1. doi: 10.1016/j.jpeds.2008.06.017. Epub 2008 Aug 9.
- Draper J, Subbiah S, Bailey R, Chambers JB. Murmur clinic: validation of a new model for detecting heart valve disease. Heart. 2019 Jan;105(1):56-59. doi: 10.1136/heartjnl-2018-313393. Epub 2018 Jul 26.
- Frias PA, Oster M, Daley PA, Boris JR. Outpatient echocardiography in the evaluation of innocent murmurs in children: utilisation benchmarking. Cardiol Young. 2016 Mar;26(3):499-505. doi: 10.1017/S1047951115000517. Epub 2015 Apr 23.
Helpful Links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 1575863-1
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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