As part of the mini-symposium entitled  Creating Devices for Personalized Health Monitoring,  Dr. McManus presents recent work related to cardiac monitoring using smartphone and bioimpedance sensors, including arrhythmia, blood volume, and heart failure monitoring

McManus, David D.

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University of Massachusetts Medical School eScholarship@UMMS UMass Center for Clinical and Translational Science Research Retreat 2014 UMass Center for Clinical and Translational Science Research Retreat May 20th, 11:00 AM Creating Devices for Personalized Health Monitoring: Cardiovascular Monitoring Case Studies David D. McManus University of Massachusetts Medical School Let us know how access to this document benefits you. Follow this and additional works at: https://escholarship.umassmed.edu/cts_retreat  Part of the Biomedical Devices and Instrumentation Commons, Biotechnology Commons, Cardiology Commons, Cardiovascular Diseases Commons, Diagnosis Commons, and the Translational Medical Research Commons McManus DD. (2014). Creating Devices for Personalized Health Monitoring: Cardiovascular Monitoring Case Studies. UMass Center for Clinical and Translational Science Research Retreat. Retrieved from https://escholarship.umassmed.edu/cts_retreat/2014/presentations/14 Creative Commons License This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. This material is brought to you by eScholarship@UMMS. It has been accepted for inclusion in UMass Center for Clinical and Translational Science Research Retreat by an authorized administrator of eScholarship@UMMS. For more information, please contact Lisa.Palmer@umassmed.edu. April 2008 David McManus, MD ScM FACC FHRS Director, Atrial Fibrillation Treatment Program; Associate Program Director, Cardiovascular Medicine Fellowship, University of Massachusetts Medical School Assistant Professor, University of Massachusetts Medical School, MA Assistant Professor, Worcester Polytechnic Institute, Worcester, MA   Creating Devices for Personalized Health Monitoring: Cardiovascular Monitoring Case Studies DISCLOSURES • I have received research funding from:  – US Department of Defense – National Heart Lung and Blood Institute – Worcester Polytechnic Institute (New Technology Development Grant) – St. Jude Medical – Philips Healthcare – Sanofi Aventis – Biotronik – Otsuka Pharmaceuticals – Astra Zeneca PRESENTATION AGENDA • Present new results using a transthoracic bioimpedance monitoring system to detect heart failure decompensation • Discuss a smartphone-based arrhythmia detection system   4 WHAT IS HEART FAILURE? – A set of symptoms resulting from failure of the heart to pump blood to meet the metabolic demands of the body. – Diagnosis is defined by signs and symptoms.   No clear, straightforward diagnostic test for HF Respiratory problems Labored breathing Difficulty breathing when lying flat Paroxysmal nocturnal dyspnea Pulmonary edema Fatigue Exercise intolerance Edema Weight gain Distended neck veins Nausea Diminished appetite Excessive urination during night Fluid retention Angina Cardiac rhythm disorders 5 THE CHALLENGES OF HEART FAILURE MANAGEMENT Data source: AHA. Heart and Stroke Statistics – 2009 Update.  Each year there are 1.1 million HF admissions in the US. The mean cost of each HF hospitalization is $18,000 27% of HF patients re-hospitalized within 30 days; 50% within 6 months2 Hospitals are penalized for early readmissions after HF hospitalization Pulmonary congestion is difficult to recognize in its early stages due to the late appearance of symptoms.3 Fluid accumulation is often detected too late to avert hospitalization4 Weight monitoring has low patient compliance7 670,000 5.8 million 287,000 US Annual  Incidence HF Prevalence Annual  Mortality Annual Morbidity 1.1 million admissions 6 MONITORING OPTIONS FOR HEART FAILURE PATIENTS – Traditional monitoring - Patient keeps a diary to self-monitor weight, blood pressure, and symptoms – Tele Monitoring – automated system to simplify the monitoring of weight, blood pressure, and symptoms  Large studies have shown that telemonitoring of symptoms, weight, and symptoms to clinics does not reduce HF-related hospitalizations. – Implantable device remote monitoring – Implantable cardiac devices collect information which provide insights into HF progression e.g., ICD device with the capability to measure AF burden, heart rate variability, intra-thoracic impedance, or filling pressure changes Time Pressure changes Impedance change Autonomic adaptation Weight/BP changes, BNP, HF symptoms Decompensation Stable 7 Intrathoracic bioimpedance predicts HF decompensation The challenge • 1 in 3 of HF patients re-hospitalized within 30 days • Clinical predictors show poor predictive capabilities Clinical observation* • PARTNERS-HF study - Patients with >=1 abnormal HF statistic trend have 5-fold higher risk for hospitalization within 30 days • Mid-HeFT study – Thoracic impedance monitoring is more reliable and detects fluid changes earlier than symptom onset Courtesy Medtronic and Biotronik, Inc HF MONITORING RE-EXAMINED • Currently, HF monitoring is restricted to patients with implantable devices • A minority of HF patients are eligible for such devices • New technologies are needed to monitor for acute decompensated HF (ADHF) • Might transthoracic bioimpedance work?  Courtesy Medtronic and Philips, Inc FLUID ACCUMULATION VEST SYSTEM SENTINEL-HF: INTERIM ANALYSIS • We have recruited 107 participants admitted with ADHF to UMMC • Participants are trained on the use of a FAV-smartphone dyad to obtain and transmit a 5-minute bioimpedance measurement once daily for 45-days after discharge.  • Readmission and diuretic dosing adjustments are identified using participant report and causes adjudicated using medical records.  • Daily bioimpedance is analyzed Courtesy Medtronic and Philips, Inc SENTINEL-HF STUDY: A REPRESENTATIVE HF COHORT  -65 y66-75 y76-85 y86 y -Age distribution  -65 y: 2866-75 y: 1176-85 y: 1585 y -: 6-50 y 51-60 y 61-70 y 71-80 y 81 y -0123456Age categoryNumber of dropoutsDropouts per age categoryDemographics  Age, y  67 ± 12 Men 57% Race Caucasian  88% Other 12% Medical history Hypertension  76% Atrial fibrillation  46% Diabetes mellitus  51% Chronic lung disease  24% Coronary heart disease  22% Psychosocial characteristics  Cognitively impaired 11% Depressed  17% Clinical characteristics  Length of index hospital stay, days  5 ± 3  Body mass Index, kg/m2  33 ± 10  Ejection fraction, %  48% Discharge medications   Aspirin  69% Loop diuretic 83%   ACE inhibitor/ARB 41% 45-day outcomes HF-related rehospitalization  10%   Diuretic up-titration  10% INTERIM ANALYSIS RESULTS – SUCCESS RATE  >= 75 %< 75%Relative number of successful measurements  >= 75 %: 17 patients< 75%: 7 patients• Despite their advanced age and high burden of comorbid diseases, study participants with ADHF were able to make daily bioimpedance measurements using a FAV and transmit them using a smartphone.  • This proves the feasibility and acceptability of using HF monitors in the community TRANSTHORACIC BIOIMPEDANCE PREDICTS EARLY READMISSION FOR HF          • Early readmission was common and predicted up to 7 days in advance by an algorithm analyzing transthoracic bioimpedance.   • Transthoracic bioimpedance monitoring may offer possibilities for reducing HF readmissions by enabling identification and treatment of outpatients with early HF decompensation ATRIAL FIBRILLATION: A COMPLEX DISEASE WITH FAR-REACHING IMPACT Miyasaka Circulation 2006;11:119; Go JAMA 2001;285:2370 American Heart Association ATRIAL FIBRILLATION: A DISEASE DIAGNOSED USING TECHNOLOGY DEVELOPED IN 1903 AUTOMATED AF DETECTION ALGORITHM DEVELOPMENT • Electrocardiographic data was obtained from consenting UMMHC patients with AF who wore Holter monitors (IRB-Pro00000008)  • Data from patients in MIT-BIH AF Database were also used • Time Varying Coherence Function, Root Mean Squared and Shannon Entropy examined  TVCF of subject 8455 of the MIT-BIH AF database according to each beat and normalized frequency Lee, McManus, Chon. IEEE. 2013 DEVELOPMENT OF A COMPREHENSIVE AUTOMATED ALGORITHM FOR DETECTION OF THE 3 MAJOR ATRIAL ARRHYTHMIAS AF MONITORING: A CHANGE IS NEEDED • AF is associated with high risk for stroke and hospitalization • AF can come and go (paroxysmal), leading to delays in diagnosis • New monitoring technologies are needed A mobile phone application for data recording using a camera (The application uses the camera lens and light to acquire information about heart rate and rhythm)  (a) Green band PPG signal, (b) HRECG (thin black line) and HRGREEN (thick blue line) during spontaneous breathing, (c) HRV power spectral density plots from ECG (thin black line) and GREEN (thick blue line).    AF DETECTION USING A SMARTPHONE AN IPHONE PROTOTYPE OF THE AF DETECTION APPLICATION McManus, Lee, Chon. HeartRhythm. 2013 WE RECRUITED A COHORT OF 76 PATIENTS UNDERGOING CARDIOVERSION McManus, Lee, Chon. HeartRhythm. 2013 A NOVEL APPLICATION RUNNING AN AF DETECTION ALGORITHM DETECTS AF McManus, Lee, Chon. HeartRhythm. 2013 A SMARTPHONE APP CAN IDENTIFY AF • In a prosectively recruited cohort, we found that a novel algorithm analyzing signals from an iPhone 4S accurately distinguished pulse recordings during AF from sinus rhythm • NHLBI-funded study is underway to explore the acceptability and usability of the smartphone-based application in the community  McManus, Lee, Chon. HeartRhythm. 2013 THANK YOU FOR ATTENDING! “Now this is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning.” Winston Churchill ACKNOWLEDGEMENTS • Special thanks to the following collaborators: – Umass: Dr. Chad Darling, Dr. Jane Saczynski – WPI: Dr. Ki Chon 

Creating Devices for Personalized Health Monitoring: Cardiovascular Monitoring Case Studies

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Creating Devices for Personalized Health Monitoring: Cardiovascular Monitoring Case Studies

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