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Full-Text Articles in Engineering

Identifying Patients With Coronary Artery Disease Using Rest And Exercise Seismocardiography, Parastoo Dehkordi, Erwin P. Bauer, Kouhyar Tavakolian, Vahid Zakeri, Andrew P. Blaber, Farzad Khosrow-Khavar Sep 2019

Identifying Patients With Coronary Artery Disease Using Rest And Exercise Seismocardiography, Parastoo Dehkordi, Erwin P. Bauer, Kouhyar Tavakolian, Vahid Zakeri, Andrew P. Blaber, Farzad Khosrow-Khavar

Electrical Engineering Faculty Publications

Coronary artery disease (CAD) is the most common cause of death globally. Patients with suspected CAD are usually assessed by exercise electrocardiography (ECG). Subsequent tests, such as coronary angiography and coronary computed tomography angiography (CCTA) are performed to localize the stenosis and to estimate the degree of blockage. The present study describes a non-invasive methodology to identify patients with CAD based on the analysis of both rest and exercise seismocardiography (SCG). SCG is a non-invasive technology for capturing the acceleration of the chest induced by myocardial motion and vibrations. SCG signals were recorded from 185 individuals at rest and immediately …


Comparison Of Different Methods For Estimating Cardiac Timings: A Comprehensive Multimodal Echocardiography Investigation, Parastoo Dehkordi, Farad Khosrow-Khavar, Marco Di Rienzo, Omer T. Inan, Samuel E. Schmidt, Andrew P. Blaber, Kasper Sorensen, Johannes J. Struijk, Vahid Zakeri, Prospero Lombardi, Md. Mobaskir H. Shandhi, Mojtaba Borairi, John M. Zanetti, Kouhyar Tavakolian Aug 2019

Comparison Of Different Methods For Estimating Cardiac Timings: A Comprehensive Multimodal Echocardiography Investigation, Parastoo Dehkordi, Farad Khosrow-Khavar, Marco Di Rienzo, Omer T. Inan, Samuel E. Schmidt, Andrew P. Blaber, Kasper Sorensen, Johannes J. Struijk, Vahid Zakeri, Prospero Lombardi, Md. Mobaskir H. Shandhi, Mojtaba Borairi, John M. Zanetti, Kouhyar Tavakolian

Biomedical Sciences Faculty Publications

Cardiac time intervals are important hemodynamic indices and provide information about left ventricular performance. Phonocardiography (PCG), impedance cardiography (ICG), and recently, seismocardiography (SCG) have been unobtrusive methods of choice for detection of cardiac time intervals and have potentials to be integrated into wearable devices. The main purpose of this study was to investigate the accuracy and precision of beat-to-beat extraction of cardiac timings from the PCG, ICG and SCG recordings in comparison to multimodal echocardiography (Doppler, TDI, and M-mode) as the gold clinical standard. Recordings were obtained from 86 healthy adults and in total 2,120 cardiac cycles were analyzed. For …


Relationship Between Ischemic Stroke And Pulse Rate Variability As A Surrogate Of Heart Rate Variability, Ajay K. Verma, Parshuram M. Aarotale, Parastoo Dehkordi, Jau-Shin Lou, Kouhyar Tavakolian Jul 2019

Relationship Between Ischemic Stroke And Pulse Rate Variability As A Surrogate Of Heart Rate Variability, Ajay K. Verma, Parshuram M. Aarotale, Parastoo Dehkordi, Jau-Shin Lou, Kouhyar Tavakolian

Electrical Engineering Faculty Publications

Autonomic reflex ascertains cardiovascular homeostasis during standing. Impaired autonomic reflex could lead to dizziness and falls while standing; this is prevalent in stroke survivors. Pulse rate variability (PRV) has been utilized in the literature in lieu of heart rate variability (HRV) for ambulatory and portable monitoring of autonomic reflex predominantly in young, healthy individuals. Here, we compared the PRV with gold standard HRV for monitoring autonomic reflex in ischemic stroke survivors. Continuous blood pressure and electrocardiography were acquired from ischemic stroke survivors (64 ± 1 years) and age-matched controls (65 ± 2 years) during a 10-minute sit-to-stand test. Beat-by-beat heart …