Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility Study
Background Objective markers of cardiac function are limited in the outpatient setting and may be beneficial for monitoring patients with chronic cardiac conditions. We assess the accuracy of a scale, with the ability to capture ballistocardiography, electrocardiography, and impedance plethysmograph...
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-12-01
|
| Series: | Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease |
| Subjects: | |
| Online Access: | https://www.ahajournals.org/doi/10.1161/JAHA.121.021893 |
| _version_ | 1797945391080013824 |
|---|---|
| author | Daniel Yazdi Suriya Sridaran Sarah Smith Corey Centen Sarin Patel Evan Wilson Leah Gillon Sunil Kapur Julie A. Tracy Katherine Lewine David M. Systrom Calum A. MacRae |
| author_facet | Daniel Yazdi Suriya Sridaran Sarah Smith Corey Centen Sarin Patel Evan Wilson Leah Gillon Sunil Kapur Julie A. Tracy Katherine Lewine David M. Systrom Calum A. MacRae |
| author_sort | Daniel Yazdi |
| collection | DOAJ |
| description | Background Objective markers of cardiac function are limited in the outpatient setting and may be beneficial for monitoring patients with chronic cardiac conditions. We assess the accuracy of a scale, with the ability to capture ballistocardiography, electrocardiography, and impedance plethysmography signals from a patient’s feet while standing on the scale, in measuring stroke volume and cardiac output compared with the gold‐standard direct Fick method. Methods and Results Thirty‐two patients with unexplained dyspnea undergoing level 3 invasive cardiopulmonary exercise test at a tertiary medical center were included in the final analysis. We obtained scale and direct Fick measurements of stroke volume and cardiac output before and immediately after invasive cardiopulmonary exercise test. Stroke volume and cardiac output from a cardiac scale and the direct Fick method correlated with r=0.81 and r=0.85, respectively (P<0.001 each). The mean absolute error of the scale estimated stroke volume was −1.58 mL, with a 95% limits of agreement of −21.97 to 18.81 mL. The mean error for the scale estimated cardiac output was −0.31 L/min, with a 95% limits of agreement of −2.62 to 2.00 L/min. The changes in stroke volume and cardiac output before and after exercise were 78.9% and 96.7% concordant, respectively, between the 2 measuring methods. Conclusions In a proof‐of‐concept study, this novel scale with cardiac monitoring abilities may allow for noninvasive, longitudinal measures of cardiac function. Using the widely accepted form factor of a bathroom scale, this method of monitoring can be easily integrated into a patient’s lifestyle. |
| first_indexed | 2024-04-10T20:54:24Z |
| format | Article |
| id | doaj.art-3c87a0b3385348539dec42ac3437aaed |
| institution | Directory Open Access Journal |
| issn | 2047-9980 |
| language | English |
| last_indexed | 2024-04-10T20:54:24Z |
| publishDate | 2021-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease |
| spelling | doaj.art-3c87a0b3385348539dec42ac3437aaed2023-01-23T07:23:59ZengWileyJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease2047-99802021-12-01102410.1161/JAHA.121.021893Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility StudyDaniel Yazdi0Suriya Sridaran1Sarah Smith2Corey Centen3Sarin Patel4Evan Wilson5Leah Gillon6Sunil Kapur7Julie A. Tracy8Katherine Lewine9David M. Systrom10Calum A. MacRae11Bodyport Inc San Francisco CAOne Brave IdeaBrigham and Women’s Hospital Boston MABodyport Inc San Francisco CABodyport Inc San Francisco CABodyport Inc San Francisco CAOne Brave IdeaBrigham and Women’s Hospital Boston MAOne Brave IdeaBrigham and Women’s Hospital Boston MACardiovascular Division Brigham and Women’s Hospital Boston MACardiovascular Division Brigham and Women’s Hospital Boston MACardiovascular Division Brigham and Women’s Hospital Boston MADivision of Pulmonary and Critical Care Medicine Department of Medicine Brigham and Women’s Hospital Boston MAOne Brave IdeaBrigham and Women’s Hospital Boston MABackground Objective markers of cardiac function are limited in the outpatient setting and may be beneficial for monitoring patients with chronic cardiac conditions. We assess the accuracy of a scale, with the ability to capture ballistocardiography, electrocardiography, and impedance plethysmography signals from a patient’s feet while standing on the scale, in measuring stroke volume and cardiac output compared with the gold‐standard direct Fick method. Methods and Results Thirty‐two patients with unexplained dyspnea undergoing level 3 invasive cardiopulmonary exercise test at a tertiary medical center were included in the final analysis. We obtained scale and direct Fick measurements of stroke volume and cardiac output before and immediately after invasive cardiopulmonary exercise test. Stroke volume and cardiac output from a cardiac scale and the direct Fick method correlated with r=0.81 and r=0.85, respectively (P<0.001 each). The mean absolute error of the scale estimated stroke volume was −1.58 mL, with a 95% limits of agreement of −21.97 to 18.81 mL. The mean error for the scale estimated cardiac output was −0.31 L/min, with a 95% limits of agreement of −2.62 to 2.00 L/min. The changes in stroke volume and cardiac output before and after exercise were 78.9% and 96.7% concordant, respectively, between the 2 measuring methods. Conclusions In a proof‐of‐concept study, this novel scale with cardiac monitoring abilities may allow for noninvasive, longitudinal measures of cardiac function. Using the widely accepted form factor of a bathroom scale, this method of monitoring can be easily integrated into a patient’s lifestyle.https://www.ahajournals.org/doi/10.1161/JAHA.121.021893digital healthexercise testingheart failurehemodynamicsintelligencemachine learning and artificial |
| spellingShingle | Daniel Yazdi Suriya Sridaran Sarah Smith Corey Centen Sarin Patel Evan Wilson Leah Gillon Sunil Kapur Julie A. Tracy Katherine Lewine David M. Systrom Calum A. MacRae Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility Study Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease digital health exercise testing heart failure hemodynamics intelligence machine learning and artificial |
| title | Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility Study |
| title_full | Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility Study |
| title_fullStr | Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility Study |
| title_full_unstemmed | Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility Study |
| title_short | Noninvasive Scale Measurement of Stroke Volume and Cardiac Output Compared With the Direct Fick Method: A Feasibility Study |
| title_sort | noninvasive scale measurement of stroke volume and cardiac output compared with the direct fick method a feasibility study |
| topic | digital health exercise testing heart failure hemodynamics intelligence machine learning and artificial |
| url | https://www.ahajournals.org/doi/10.1161/JAHA.121.021893 |
| work_keys_str_mv | AT danielyazdi noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT suriyasridaran noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT sarahsmith noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT coreycenten noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT sarinpatel noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT evanwilson noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT leahgillon noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT sunilkapur noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT julieatracy noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT katherinelewine noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT davidmsystrom noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy AT calumamacrae noninvasivescalemeasurementofstrokevolumeandcardiacoutputcomparedwiththedirectfickmethodafeasibilitystudy |