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Heart Rate Variability and CAD

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https://www.readbyqxmd.com/read/29129350/evaluation-of-ecg-algorithms-designed-to-improve-detect-of-transient-myocardial-ischemia-to-minimize-false-alarms-in-patients-with-suspected-acute-coronary-syndrome
#1
Michele M Pelter, Yuan Xu, Richard Fidler, Ran Xiao, David W Mortara, Hu Xiao
BACKGROUND: Patients hospitalized for suspected acute coronary syndrome (ACS) are at risk for transient myocardial ischemia. During the "rule-out" phase, continuous ECG ST-segment monitoring can identify transient myocardial ischemia, even when asymptomatic. However, current ST-segment monitoring software is vastly underutilized due to false positive alarms, with resultant alarm fatigue. Current ST algorithms may contribute to alarm fatigue because; (1) they are not designed with a delay (minutes), rather alarm to brief spikes (i...
October 24, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29042294/impaired-cardiac-autonomic-regulation-and-long-term-risk-of-atrial-fibrillation-in-patients-with-coronary-artery-disease
#2
Santeri Nortamo, Olavi Ukkola, Antti Kiviniemi, Mikko Tulppo, Heikki Huikuri, Juha Perkiömäki
BACKGROUND: The influence of autonomic cardiac regulation on long-term risk of new-onset atrial fibrillation (AF) in coronary artery disease (CAD) is not well established. OBJECTIVE: To evaluate the value of heart rate variability (HRV), a marker of cardiac autonomic regulation, in predicting new-onset AF in CAD. METHODS: The Innovation to Reduce Cardiovascular Complications of Diabetes at the Intersection (ARTEMIS) study population consisted of 1,946 patients with CAD...
October 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28989893/an-intriguing-family-with-type-2-diabetes-mellitus-and-complete-heart-block
#3
Gaurav Agarwal, Satish Kumar Singh
Chronic hyperglycaemia of Type 2 Diabetes Mellitus (T2DM) causes long term damage to heart resulting in coronary artery disease (CAD), myocardial infarction (MI), congestive heart failure (CHF), and sudden death from arrhythmias. A 62 year old male presented to our emergency with complaint of sudden onset giddiness from last 2 hours. This was followed by loss of consciousness. Patient was a known case of T2DM since last 1 year. Family history- patient has two brothers who also have T2DM and both of them also developed Complete Heart Block (CHB) spontaneously...
September 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28981382/association-between-mental-health-burden-and-coronary-artery-disease-in-u-s-women-veterans-over-45-a-national-cross-sectional-study
#4
Megan R Gerber, Matthew W King, Katherine M Iverson, Suzanne L Pineles, Sally G Haskell
BACKGROUND: The women Veteran population accessing Veterans Health Administration (VA) care has grown rapidly. Women Veterans exhibit high rates of mental health conditions that increase coronary artery disease (CAD) risk; however, the relationship between specific conditions and increasing mental health burden to CAD in this population is unknown. MATERIALS AND METHODS: Using VA National Patient Care Data for 2009, we identified women Veterans over 45 (N = 157,195)...
October 5, 2017: Journal of Women's Health
https://www.readbyqxmd.com/read/28974833/comparing-hemodynamic-responses-to-diazepam-propofol-and-etomidate-during-anesthesia-induction-in-patients-with-left-ventricular-dysfunction-undergoing-coronary-artery-bypass-graft-surgery-a-double-blind-randomized-clinical-trial
#5
Aria Soleimani, Neda Heidari, Mohammad Reza Habibi, Farshad Hasanzadeh Kiabi, Mohammad Khademloo, Amir Emami Zeydi, Fatemeh Bozorg Sohrabi
BACKGROUND: Anesthesia induction is often accompanied by a period of hemodynamic instability, which could be deleterious in patients with coronary artery disease (CAD) and left ventricular dysfunction undergoing coronary artery bypass graft (CABG) surgery. The aim of this study was to compare the hemodynamic responses to propofol, etomidate, and diazepam following anesthesia induction, laryngoscopy and intubation in CABG surgery patients with low ejection fraction (EF). METHODS: A double-blind randomized, clinical study was performed on 150 patients with CAD and left ventricular dysfunction (EF≤35%) scheduled for elective CABG surgery with Cardiopulmonary bypass (CPB)...
June 2017: Medical Archives
https://www.readbyqxmd.com/read/28933714/hr-%C3%AC-v-775-o-8322-and-rpe-relationships-in-an-aquatic-incremental-maximum-test-performed-by-young-women
#6
Gabriela B David, Luana S Andrade, Gustavo Z Schaun, Cristine L Alberton
David, GB, Andrade, LS, Schaun, GZ, and Alberton, CL. HR, V̇O₂, and RPE relationships in an aquatic incremental maximum test performed by young women. J Strength Cond Res 31(10): 2852-2858, 2017-The purpose of the study was to verify the relationship between oxygen uptake (V̇O₂), heart rate (HR), rate of perceived exertion (RPE), and cadence (CAD) in an aquatic incremental maximum test performed during a water-based stationary running exercise. The study also verified the best adjustments for these relationships (linear or polynomial)...
October 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28914638/long-term-risk-and-predictors-of-cardiovascular-death-in-stable-coronary-artery-disease-the-coronor-study
#7
Christophe Bauters, Olivier Tricot, Thibaud Meurice, Nicolas Lamblin
BACKGROUND: There is limited knowledge on the residual risk of cardiovascular death (CVD) in patients with stable coronary artery disease (CAD) who receive modern secondary prevention. Our aim was to analyze the causes of death and to determine predictors of CVD in the 5-year CORONOR registry. METHODS: We studied 4184 consecutive CAD outpatients who were free from any myocardial infarction (MI) or coronary revascularization for more than 1 year at inclusion. Antithrombotics were prescribed in 99%, statins in 92%, inhibitors of renin-angiotensin system in 82%, and β-blockers in 79%; 86% had prior coronary revascularization...
December 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28662007/-evaluation-of-sleep-apnea-detected-by-24-hour-ecg-holter-monitoring-analysis-in-patients-with-stable-coronary-artery-disease-and-ischemic-heart-failure-correlations-with-clinical-data
#8
Magdalena Frączek-Jucha, Paweł Rostoff, Jacek Łach, Jadwiga Nessler, Andrzej Gackowski
Obstructive sleep apnoea (OSA) is frequently undiagnosed in patients with heart failure (HF) and coronary artery disease (CAD). Simple and widely available screening tests are needed to diagnose patients with SA. Measurements of thoracic impedance and heart rate variability during 24-hour ECG Holter (H-EKG) monitoring allows to calculate estimated apnoea-hypopnoea index (eAHI). AIM: The aim of the research was to assess prevalence of OSA evaluated with the use of H-EKG and determination of its clinical relevance in patients with CAD and ischeamic HF...
June 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28636505/the-effect-of-aerobic-interval-training-and-continuous-training-on-exercise-capacity-and-its-determinants
#9
Nele Pattyn, Paul J Beckers, Véronique A Cornelissen, Ellen Coeckelberghs, Catherine De Maeyer, Geert Frederix, Kaatje Goetschalckx, Nadine Possemiers, Dirk Schepers, Emeline M Van Craenenbroeck, Kurt Wuyts, Viviane M Conraads, Luc Vanhees
Objective We aimed to investigate (1) the effects of aerobic interval training (AIT) and aerobic continuous training (ACT) on (sub)maximal exercise measures and its determinants including endothelial function, muscle strength and cardiac autonomic function, and (2) the relationship between exercise capacity and these determinants. Methods Two-hundred coronary artery disease (CAD) patients (58.4 ± 9.1 years) were randomized to AIT or ACT for 12 weeks. All patients performed a cardiopulmonary exercise test and endothelial function measurements before and after the intervention; a subpopulation underwent muscle strength and heart rate variability (HRV) assessments...
June 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28536533/heart-rate-fragmentation-a-new-approach-to-the-analysis-of-cardiac-interbeat-interval-dynamics
#10
Madalena D Costa, Roger B Davis, Ary L Goldberger
Background: Short-term heart rate variability (HRV) is most commonly attributed to physiologic vagal tone modulation. However, with aging and cardiovascular disease, the emergence of high short-term HRV, consistent with the breakdown of the neuroautonomic-electrophysiologic control system, may confound traditional HRV analysis. An apparent dynamical signature of such anomalous short-term HRV is frequent changes in heart rate acceleration sign, defined here as heart rate fragmentation. Objective: The aims were to: (1) introduce a set of metrics designed to probe the degree of sinus rhythm fragmentation; (2) test the hypothesis that the degree of fragmentation of heartbeat time series increases with the participants' age in a group of healthy subjects; (3) test the hypothesis that the heartbeat time series from patients with advanced coronary artery disease (CAD) are more fragmented than those from healthy subjects; and (4) compare the performance of the new fragmentation metrics with standard time and frequency domain measures of short-term HRV...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28387685/investigation-of-heart-rate-variability-of-patients-undergoing-coronary-artery-bypass-grafting-cabg
#11
A Hossen, D Jaju, M Al-Abri, H Al-Sabti, M Mukaddirov, M Hassan, K Al-Hashmi
BACKGROUND: Myocardial revascularization by coronary artery bypass grafting (CABG) is an effective measure for reducing symptoms and mortality in patients with unstable or severe coronary artery disease (CAD). Autonomic function can be estimated non-invasively using heart rate variability (HRV). HRV of patients undergoing CABG is investigated before and after CABG using a soft-decision wavelet based spectral analysis. OBJECTIVE: The main purpose of this work is to evaluate non-invasively HRV in patients undergoing CABG before operation; and to monitor the status of patients through HRV investigation on day 6 and day 30 after the CABG operation...
2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28381400/association-of-plasma-7-ketocholesterol-with-cardiovascular-outcomes-and-total-mortality-in-patients-with-coronary-artery-disease
#12
Jiayi Song, Duan Wang, Hongen Chen, Xiuwei Huang, Yuan Zhong, Nan Jiang, Chaogang Chen, Min Xia
RATIONALE: 7-Ketocholesterol (7-KC), a form of cholesterol oxidation product, plays an essential role in the atherogenesis in animal models. OBJECTIVE: We sought to determine the association of circulating 7-KC with clinical cardiovascular outcomes and total mortality in patients with stable coronary artery disease. METHODS AND RESULTS: We measured the plasma 7-KC levels by high-performance liquid chromatography in a prospective cohort study of 1016 patients (mean age, 63...
May 12, 2017: Circulation Research
https://www.readbyqxmd.com/read/28103324/use-of-proton-pump-inhibitors-predicts-heart-failure-and-death-in-patients-with-coronary-artery-disease
#13
Ana María Pello Lázaro, Carmen Cristóbal, Juan Antonio Franco-Peláez, Nieves Tarín, Álvaro Aceña, Rocío Carda, Ana Huelmos, María Luisa Martín-Mariscal, Jesús Fuentes-Antras, Juan Martínez-Millá, Joaquín Alonso, Óscar Lorenzo, Jesús Egido, Lorenzo López-Bescós, José Tuñón
OBJECTIVES: Proton-pump inhibitors (PPIs) seem to increase the incidence of cardiovascular events in patients with coronary artery disease (CAD), mainly in those using clopidogrel. We analysed the impact of PPIs on the prognosis of patients with stable CAD. METHODS: We followed 706 patients with CAD. Primary outcome was the combination of secondary outcomes. Secondary outcomes were 1) acute ischaemic events (any acute coronary syndrome, stroke, or transient ischaemic attack) and 2) heart failure (HF) or death...
2017: PloS One
https://www.readbyqxmd.com/read/28102898/a-composite-autonomic-index-as-unitary-metric-for-heart-rate-variability-a-proof-of-concept
#14
Roberto Sala, Mara Malacarne, Nadia Solaro, Massimo Pagani, Daniela Lucini
BACKGROUND: This study addresses whether a unitary cardiac autonomic nervous system index (ANSI), obtained combining multiple metrics from heart rate variability (HRV) into a radar plot could provide an easy appreciation of autonomic performance in a clinical setting. MATERIALS AND METHODS: Data are standardized using percentile ranking of autonomic proxies from a relatively large reference population (n = 1593, age 39 ± 13 years). Autonomic indices are obtained from autoregressive spectral analysis of (ECG derived) HRV at rest and during standing up...
March 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28068419/anxiety-level-and-cardiac-autonomic-modulations-in-coronary-artery-disease-and-cardiac-syndrome-x-patients
#15
Mohamed Faisal Lutfi
BACKGROUND: Anxiety and cardiac autonomic modulations (CAM) were thoroughly investigated in coronary artery disease (CAD) and cardiac syndrome X (CSX) patients worldwide, but not among Sudanese with similar pathology. AIMS: To compare levels of anxiety and CAM between Sudanese patients with CSX and CAD. MATERIALS AND METHODS: Anxiety was evaluated in 51 CAD and 26 CSX patients using Taylor Manifest anxiety score (TMAS) questionnaire while heart rate variability derived indices were used to assess CAM, namely natural logarithm of low frequency (LnLF), high frequency (LnHF) and LF/HF ratio (LnLF/HF)...
2017: PloS One
https://www.readbyqxmd.com/read/28052754/the-burden-of-major-adverse-cardiac-events-in-patients-with-coronary-artery-disease
#16
I-Ting Tsai, Chao-Ping Wang, Yung-Chuan Lu, Wei-Chin Hung, Cheng-Ching Wu, Li-Fen Lu, Fu-Mei Chung, Chia-Chang Hsu, Yau-Jiunn Lee, Teng-Hung Yu
BACKGROUND: Patients with a history of cardiovascular disease are at high risk of developing secondary major adverse cardiac events (MACE). This study aimed to identify independent predictors of MACE after hospital admission which could be used to identify of high-risk patients who may benefit from preventive strategies. METHODS: This study included 1,520 consecutive patients with coronary artery disease (CAD) (654 with acute coronary syndrome (ACS) and 866 with elective percutaneous coronary intervention (PCI) patients) who received PCI and/or stenting...
January 4, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28041575/the-impact-of-major-depression-on-heart-rate-variability-and-endothelial-dysfunction-in-patients-with-stable-coronary-artery-disease
#17
Esra Aydin Sunbul, Murat Sunbul, Huseyin Gulec
BACKGROUND: Depression is an independent risk factor in cardiovascular diseases. Changes in the cardiac autonomic functions and pro-inflammatory processes are potential biological factors. Endothelial dysfunction plays an important role in the etiopathogenesis of atherosclerosis. Our objective was to evaluate the impact of major depression on heart rate variability and endothelial dysfunction in patients with stable CAD. METHODS: The study group included 65 CAD patients with a diagnosis of major depression and 54 CAD patients without major depression...
January 2017: General Hospital Psychiatry
https://www.readbyqxmd.com/read/28017688/effect-of-position-on-the-residual-heart-rate-variability-in-patients-after-orthotopic-heart-transplantation
#18
Yi-Ying Lin, Wan-An Lu, Yuan-Chen Hsieh, Hsiao-Huang Chang, Chun-Che Shih, Mei-Jy Jeng, Cheng-Deng Kuo
BACKGROUND: This study investigated the effects of position on heart rate variability (HRV) in patients some years after orthotopic heart transplantation (OHT) surgery. METHODS: Spectral HRV analysis was performed on 15 patients after OHT and 16 patients with coronary artery disease (CAD). HRV measures were compared between OHT and CAD patients in four randomly ordered positions [supine, right lateral decubitus (RLD), left lateral decubitus (LLD), and upright]. Multivariable linear regression analysis was used to identify the factors associated with cardiac function and HRV of OHT patients in supine position, and the factors associated with the outcome (OHT or CAD) of the patients...
February 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/27928211/use-of-heart-rate-variability-to-estimate-lactate-threshold-in-coronary-artery-disease-patients-during-resistance-exercise
#19
Rodrigo P Simões, Renata G Mendes, Viviane Castello-Simões, Aparecida M Catai, Ross Arena, Audrey Borghi-Silva
The aim of this study was to investigate whether it is possible to identify the first turn point of blood lactate (BL) concentration (1(st) lactate threshold - LT1) during a discontinuous resistance exercise protocol in coronary artery disease (CAD) patients and verify if heart rate variability (HRV) responses are consistent with BL responses. A total of 22 elderly men, 12 with CAD and 10 apparently healthy (control group = CG), underwent one-repetition maximum (1RM) testing on an inclined leg press. Discontinuous resistance exercise testing (DRET) was initiated at 10% of the 1RM with subsequent increases of 10% until 30% and after this percentage, 5% increments of 1RM was carried out...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27886710/automated-diagnosis-of-coronary-artery-disease-cad-patients-using-optimized-svm
#20
Azam Davari Dolatabadi, Siamak Esmael Zadeh Khadem, Babak Mohammadzadeh Asl
BACKGROUND AND OBJECTIVE: Currently Coronary Artery Disease (CAD) is one of the most prevalent diseases, and also can lead to death, disability and economic loss in patients who suffer from cardiovascular disease. Diagnostic procedures of this disease by medical teams are typically invasive, although they do not satisfy the required accuracy. METHODS: In this study, we have proposed a methodology for the automatic diagnosis of normal and Coronary Artery Disease conditions using Heart Rate Variability (HRV) signal extracted from electrocardiogram (ECG)...
January 2017: Computer Methods and Programs in Biomedicine
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