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Exercise ECG

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https://www.readbyqxmd.com/read/28324936/a-preliminary-study-on-multi-wavelength-ppg-based-pulse-transit-time-detection-for-cuffless-blood-pressure-measurement
#1
Jing Liu, Yuan-Ting Zhang, Xiao-Rong Ding, Wen-Xuan Dai, Ni Zhao
Pulse transit time (PTT) has been widely studied as an index of blood pressure (BP) changes. In recent years, some prototypes of PTT-based wearable BP measurement devices have been developed, which can relieve users from the discomfort caused by the inflating cuff used in auscultatory and oscillometric BP measurement techniques. However, in the common practice for PTT detection, multi-site sensor implementation on human body is required, making it difficult for the integration of wearable devices. Since multi-wavelength (MW) photoplethysmogram (PPG) signals carry blood pulsation information of different blood vessels embedded in different skin depths, the time difference between different wavelength PPG signals collected at the same body site can be treated as a special PTT on a short length of blood vessels beneath the skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28318658/sudden-death-in-athletes
#2
Domenico Corrado, Alessandro Zorzi
Competitive sports activity is associated with an increased risk of sudden cardiovascular death (SCD) in adolescents and young adults with clinically silent cardiovascular disorders. While in middle-aged/senior athletes atherosclerotic coronary artery disease accounts for the vast majority of SCDs, in young athletes the spectrum of substrates is wider and includes inherited (cardiomyopathies) and congenital (anomalous origin of coronary arteries) structural heart diseases. Inherited ion channel diseases have been implicated in SCDs occurring with an apparently normal heart at autopsy...
March 10, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28317171/combination-of-change-in-hematological-parameters-with-exercise-stress-test-to-predict-coronary-artery-disease
#3
Ahmet Korkmaz, Abdulkadir Yıldız, Pınar Türker Duyuler, Serkan Duyuler, Samet Yılmaz, Funda Basyigit, Ozgul Ucar Elalmis, Umit Guray, Mehmet Ileri
OBJECTIVE: Treadmill exercise stress testing for identifying patients with a higher likelihood of coronary artery disease (CAD) before elective coronary angiography is recommended in the current guidelines. In this study, we aimed to evaluate the changes in the hematological parameters before and after exercise stress test in relation with the presence of CAD. METHODS: A total of 113 patients with chest pain who underwent treadmill exercise testing and coronary angiography were included in this study...
March 20, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28316113/the-utility-of-exercise-testing-in-risk-stratification-of-asymptomatic-patients-with-type-1-brugada-pattern
#4
Muthiah Subramanian, Mukund A Prabhu, M S Harikrishnan, Saritha S Shekhar, Praveen G Pai, K U Natarajan
INTRODUCTION: Risk stratification of asymptomatic patients with a Brugada type 1 ECG pattern remains an unresolved clinical conundrum. In contrast to provocative pharmacological testing in Brugada syndrome, there is limited data on the role of exercise stress testing as a risk stratification modality. The objective of this study was to evaluate the utility of exercise testing in asymptomatic patients with type 1 Brugada pattern to prognosticate major arrhythmic events(MAE) during follow-up...
March 18, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28294866/-treatment-of-patients-with-stable-ischemic-heart-disease-in-real-clinical-practice-in-russia-the-choice-2-program
#5
G Glezer M, On Behalf Of The Choice-Study Participants On Behalf Of The Choice-Study Participants
OBJECTIVE: in the framework of an open post-marketing observational national program CHOICE-2 to assess correspondence between recommendations for management of patients with stable angina and actual clinical practice, as well as to assess effect of treatment with cytoprotector trimetazidine on clinical course of the disease. MATERIAL AND METHODS: Participating physicians (n=185 from 46 regions of Russian Federation) recruited 896 patients with ischemic heart disease (IHD)...
May 2016: Kardiologiia
https://www.readbyqxmd.com/read/28289841/role-of-exercise-cardiogoniometry-in-coronary-artery-disease-diagnostics
#6
A Weber, J Smid, B Luani, R C Braun-Dullaeus, I Tanev
BACKGROUND: The use of noninvasive diagnostics in coronary artery disease remains underdeveloped. To date, there is no simple and inexpensive method that can lead to a reliable diagnosis. Aside from costly and elaborate imaging techniques, exercise ECG, with its rather moderate sensitivity and specificity, is the main diagnostic method available. METHODS: In this prospective study of 109 patients, the diagnostic value of cardiogoniometry (CGM), a three-dimensional, computer-analyzed vector cardiogram, was determined before and after physical stress, and the results were compared with those obtained from a stress test...
March 13, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28288955/resting-and-postexercise-heart-rate-detection-from-fingertip-and-facial-photoplethysmography-using-a-smartphone-camera-a-validation-study
#7
Bryan P Yan, Christy Ky Chan, Christien Kh Li, Olivia Tl To, William Hs Lai, Gary Tse, Yukkee C Poh, Ming-Zher Poh
BACKGROUND: Modern smartphones allow measurement of heart rate (HR) by detecting pulsatile photoplethysmographic (PPG) signals with built-in cameras from the fingertips or the face, without physical contact, by extracting subtle beat-to-beat variations of skin color. OBJECTIVE: The objective of our study was to evaluate the accuracy of HR measurements at rest and after exercise using a smartphone-based PPG detection app. METHODS: A total of 40 healthy participants (20 men; mean age 24...
March 13, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28275419/early-diagnosis-and-treatment-of-coronary-heart-disease-in-symptomatic-subjects-with-advanced-vascular-atherosclerosis-of-the-carotid-artery-type-iii-and-iv-b-findings-using-ultrasound
#8
Ansgar Adams, Waldemar Bojara, Klaus Schunk
BACKGROUND: A study was conducted as to whether the early diagnosis of coronary heart disease (CHD) in symptomatic patients with advanced atherosclerosis of the carotid artery was more successful using ultrasound technology than exercise electrocardiography (ECG). METHODS: Within the scope of an occupational screening program using subjects from diverse employment sectors, people were given the opportunity to determine their risk of heart attack. During the study, the total plaque area (TPA), the maximum plaque thickness in the carotid artery and the PROCAM scores of 3,513 healthy men and 2,088 healthy women between the ages of 20 and 65 were determined...
February 2017: Cardiology Research
https://www.readbyqxmd.com/read/28268977/estimation-of-heart-rate-from-foot-worn-photoplethysmography-sensors-during-fast-bike-exercise
#9
Delaram Jarchi, Alexander J Casson
This paper presents a new method for estimating the average heart rate from a foot/ankle worn photoplethysmography (PPG) sensor during fast bike activity. Placing the PPG sensor on the lower half of the body allows more energy to be collected from energy harvesting in order to give a power autonomous sensor node, but comes at the cost of introducing significant motion interference into the PPG trace. We present a normalised least mean square adaptive filter and short-time Fourier transform based algorithm for estimating heart rate in the presence of this motion contamination...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268930/can-ppg-be-used-for-hrv-analysis
#10
N Pinheiro, R Couceiro, J Henriques, J Muehlsteff, I Quintal, L Goncalves, P Carvalho
Heart rate variability (HRV) represents one of the most promising markers of the autonomic nervous system (ANS) regulation. However, it requires the acquisition of the ECG signal in order to reliably detect the RR intervals, which is not always easily and comfortably available in personal health applications. Additionally, due to progress in single spot optical sensors, photoplethysmography (PPG) is an interesting alternative for heartbeat interval measurements, since it is a more convenient and a less intrusive measurement technique...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28261908/acute-coronary-syndrome-screening-and-diagnostic-practice-variation
#11
Maame Yaa A B Maya Yiadom, Xulei Liu, Conor M McWade, Dandan Liu, Alan B Storrow
BACKGROUND: In the absence of the existing acute coronary syndrome guidelines directing the clinical practice implementation of ED screening and diagnosis, there is variable screening and diagnostic clinical practice across ED facilities. This practice diversity may be warranted. Understanding the variability may identify opportunities for more consistent practice. METHODS: This is a cross-sectional clinical practice epidemiology study with the emergency department (ED) as the unit of analysis characterizing variability in the acute coronary syndrome (ACS) evaluation across 62 diverse EDs...
March 6, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28227187/estimation-of-heart-rate-from-foot-worn-photoplethysmography-sensors-during-fast-bike-exercise
#12
Delaram Jarchi, Alexander J Casson, Delaram Jarchi, Alexander J Casson, Alexander J Casson, Delaram Jarchi
This paper presents a new method for estimating the average heart rate from a foot/ankle worn photoplethysmography (PPG) sensor during fast bike activity. Placing the PPG sensor on the lower half of the body allows more energy to be collected from energy harvesting in order to give a power autonomous sensor node, but comes at the cost of introducing significant motion interference into the PPG trace. We present a normalised least mean square adaptive filter and short-time Fourier transform based algorithm for estimating heart rate in the presence of this motion contamination...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227136/can-ppg-be-used-for-hrv-analysis
#13
N Pinheiro, R Couceiro, J Henriques, J Muehlsteff, I Quintal, L Goncalves, P Carvalho, N Pinheiro, R Couceiro, J Henriques, J Muehlsteff, I Quintal, L Goncalves, P Carvalho, P Carvalho, J Muehlsteff, L Goncalves, N Pinheiro, J Henriques, I Quintal, R Couceiro
Heart rate variability (HRV) represents one of the most promising markers of the autonomic nervous system (ANS) regulation. However, it requires the acquisition of the ECG signal in order to reliably detect the RR intervals, which is not always easily and comfortably available in personal health applications. Additionally, due to progress in single spot optical sensors, photoplethysmography (PPG) is an interesting alternative for heartbeat interval measurements, since it is a more convenient and a less intrusive measurement technique...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226573/a-preliminary-study-on-multi-wavelength-ppg-based-pulse-transit-time-detection-for-cuffless-blood-pressure-measurement
#14
Jing Liu, Yuan-Ting Zhang, Xiao-Rong Ding, Wen-Xuan Dai, Ni Zhao, Jing Liu, Yuan-Ting Zhang, Xiao-Rong Ding, Wen-Xuan Dai, Ni Zhao, Wen-Xuan Dai, Yuan-Ting Zhang, Xiao-Rong Ding, Ni Zhao, Jing Liu
Pulse transit time (PTT) has been widely studied as an index of blood pressure (BP) changes. In recent years, some prototypes of PTT-based wearable BP measurement devices have been developed, which can relieve users from the discomfort caused by the inflating cuff used in auscultatory and oscillometric BP measurement techniques. However, in the common practice for PTT detection, multi-site sensor implementation on human body is required, making it difficult for the integration of wearable devices. Since multi-wavelength (MW) photoplethysmogram (PPG) signals carry blood pulsation information of different blood vessels embedded in different skin depths, the time difference between different wavelength PPG signals collected at the same body site can be treated as a special PTT on a short length of blood vessels beneath the skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28219898/sk4-k-channels-are-therapeutic-targets-for-the-treatment-of-cardiac-arrhythmias
#15
Shiraz Haron-Khun, David Weisbrod, Hanna Bueno, Dor Yadin, Joachim Behar, Asher Peretz, Ofer Binah, Edith Hochhauser, Michael Eldar, Yael Yaniv, Michael Arad, Bernard Attali
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a stress-provoked ventricular arrhythmia, which also manifests sinoatrial node (SAN) dysfunction. We recently showed that SK4 calcium-activated potassium channels are important for automaticity of cardiomyocytes derived from human embryonic stem cells. Here SK4 channels were identified in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) from healthy and CPVT2 patients bearing a mutation in calsequestrin 2 (CASQ2-D307H) and in SAN cells from WT and CASQ2-D307H knock-in (KI) mice...
February 20, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28212075/towards-photoplethysmography-based-estimation-of-instantaneous-heart-rate-during-physical-activity
#16
Delaram Jarchi, Alex Casson
OBJECTIVE: Recently numerous methods have been proposed for estimating average heart rate using photoplethysmography (PPG) during physical activity, overcoming the significant interference that motion causes in PPG traces. We propose a new algorithm framework for extracting instantaneous heart rate from wearable PPG and ECG signals to provide an estimate of heart rate variability during exercise. METHODS: For ECG signals we propose a new spectral masking approach which modifies a particle filter tracking algorithm, and for PPG signals constrains the instantaneous frequency obtained from the Hilbert transform to a region of interest around a candidate heart rate measure...
February 13, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28179611/asymptomatic-cocaine-abuse%C3%A3-myocardial-tissue-characterization-using-cardiac-biomarkers-and-cardiovascular-magnetic-resonance-imaging
#17
Ulf K Radunski, Ulrike Fuger, Sebastian Bohnen, Gunnar K Lund, Christian Stehning, Tanja Zeller, Enver Tahir, Maxim Avanesov, Gerhard Adam, Stefan Blankenberg, Jens Reimer, Kai Muellerleile
BACKGROUND: Use of cocaine is widespread and associated with several cardiovascular diseases. Recent CMR studies indicate frequent myocardial scar/fibrosis in asymptomatic cocaine abusers (CA).Methods and Results:This study used a combination of advanced CMR tissue characterization techniques, including late gadolinium enhancement (LGE) for focal, and extracellular volume (ECV) imaging for diffuse myocardial injury/fibrosis, with circulating biomarkers for a comprehensive characterization of myocardial injury...
February 7, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28144449/intermediate-risk-chronic-stable-angina-neutrophil-lymphocyte-ratio-and-fibrinogen-levels-improved-predicting-angiographically-detected-coronary-artery-disease
#18
Habib Haybar, Ahmad Ahmadzadeh, Ahmadreza Assareh, Nader Afshari, Mohammadreza Bozorgmanesh, Mahdis Vakili
BACKGROUND: Coronary heart disease (CHD) is the leading cause of death worldwide. Research indicates that coronary atherosclerosis is the most frequent cause of CHD. Evidence is scarce concerning the clinical efficacy of fibrinogen or neutrophil-lymphocyte ratio (NLR) measurement in risk-stratifying patients with chronic stable angina. OBJECTIVES: To examine the independent and incremental prognostic value of fibrinogen and neutrophil-lymphocyte ratio (NLR) for angiographically-detected coronary artery disease (CAD)...
September 2016: Iranian Red Crescent Medical Journal
https://www.readbyqxmd.com/read/28139138/the-value-of-predischarge-exercise-ecg-testing-in-chest-pain-patients-in-the-era-of-high-sensitivity-troponins
#19
Lina Ljung, Martin Sundqvist, Tomas Jernberg, Kai M Eggers, Gunnar Ljunggren, Mats Frick
BACKGROUND: The aim of this study was to examine the value of predischarge exercise electrocardiogram (ECG) testing of chest pain patients in whom acute myocardial infarction (MI) had been ruled out by means of high-sensitivity troponins, ECG and history. METHODS: All patients hospitalised for chest pain who underwent exercise ECG testing before discharge from the Department of Cardiology, Södersjukhuset, Stockholm, Sweden from January 2011 to June 2012 were included...
January 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28096758/effects-of-acute-ingestion-of-a-pre-workout-dietary-supplement-with-and-without-p-synephrine-on-resting-energy-expenditure-cognitive-function-and-exercise-performance
#20
Y Peter Jung, Conrad P Earnest, Majid Koozehchian, Elfego Galvan, Ryan Dalton, Dillon Walker, Christopher Rasmussen, Peter S Murano, Mike Greenwood, Richard B Kreider
BACKGROUND: The purpose of this study was to examine the effects of acute ingestion of a pre-workout dietary supplement (PWS) with and without p-synephrine (S) on perceptions of readiness to perform, cognitive function, exercise performance, and markers of safety. METHODS: In a randomized, double-blind, and counterbalanced manner; 25 healthy and recreationally active male and female participants ingested a flavored maltodextrin placebo (PLA), a PWS containing beta-alanine (3 g), creatine nitrate as a salt (2 g), arginine alpha-ketoglutarate (2 g), N-Acetyl-L-Tyrosine (300 mg), caffeine (284 mg), Mucuna pruiriens extract standardized for 15% L-Dopa (15 mg), Vitamin C as Ascorbic Acid (500 mg), niacin (60 mg), folate as folic acid (50 mg), and Vitamin B12 as Methylcobalamin (70 mg) with 2 g of maltodextrin and flavoring; or, the PWS with Citrus aurantium (PWS + S) extract standardized for 30% p-synephrine (20 mg)...
2017: Journal of the International Society of Sports Nutrition
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