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https://www.readbyqxmd.com/read/29225848/delayed-diagnosis-of-brugada-syndrome-in-a-patient-with-aborted-sudden-cardiac-death-and-initial-negative-flecainide-challenge
#1
Samuel Chauveau, Olivier Le Vavasseur, Philippe Chevalier
A negative flecainide challenge does not rule out Brugada syndrome even in the presence of nonfatal cardiac arrest as the first manifestation of the disease. This should prompt clinicians to ensure long-term ECG follow-up and consider repeating a drug test with another sodium channel blocker.
December 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29214150/the-physiocam-a-novel-non-contact-sensor-to-measure-heart-rate-variability-in-clinical-and-field-applications
#2
Maria I Davila, Gregory F Lewis, Stephen W Porges
Heart rate variability (HRV) is a reliable indicator of health status and a sensitive index of autonomic stress reactivity. Stress negatively affects physical and psychological wellness by decreasing cardiovascular health and reducing quality of life. Wearable sensors have made it possible to track HRV during daily activity, and recent advances in mobile technology have reduced the cost and difficulty of applying this powerful technique. Although advances have made sensors smaller and lighter, some burden on the subject remains...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29206569/application-of-miniature-heart-rate-data-loggers-for-use-in-large-free-moving-decapod-crustaceans-method-development-and-validation
#3
Iain J McGaw, S Clay Steell, Travis E Van Leeuwen, Erika J Eliason, Steven J Cooke
Cardiovascular responses of decapod crustaceans to environmental challenges have received extensive attention. However, nearly all of these studies have been restricted to lab-based experiments; here we describe a methodology that will enable measurement of heart rate (HR) in free-moving decapods in the field. Data storage tag heart rate and temperature loggers (DST micro-HRT; Star-Oddi) were used to record electrocardiograms (ECG) and HR in large decapod crustaceans. These loggers were originally designed for use in vertebrates and must be surgically implanted in the body cavity near the heart in order to function...
January 2018: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/29174197/comparison-of-cardiac-measurements-by-multi-detector-computed-tomography-angiography-and-transthoracic-echocardiography-in-english-bulldogs
#4
E T Hostnik, B A Scansen, A M Habing, G A Chiappone, R R Layman, R D White
INTRODUCTION: Transthoracic echocardiography (TTE) is the primary tool for the assessment of cardiac structure and function in dogs but is challenging in English bulldogs due to dorsoventral compression of the thorax, obesity, and narrow intercostal spaces. Multi-detector computed tomography angiography (CTA) may overcome the conformational obstacles of cardiac imaging in this breed. ANIMALS: Eleven client-owned English bulldogs. MATERIALS AND METHODS: Prospective clinical trial with paired analysis of TTE and CTA studies...
November 22, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/29169886/a-potential-diagnostic-pitfall-in-acute-chest-pain-massive-pulmonary-embolism-mimicking-acute-st-elevation-myocardial-infarction
#5
Ya-Wen Lu, Yi-Lin Tsai, Chun-Chin Chang, Po-Hsun Huang
BACKGROUND: Pulmonary embolism (PE) represents a clinical challenge for clinicians because of nonspecific presentations, including dyspnea, chest pain, and tachycardia. The immediate 12-lead electrocardiogram (ECG) is commonly used to facilitate differential diagnosis of acute chest pain. Although relative rare, massive pulmonary embolism could induce ST segment elevation and mimic acute myocardial infarction. CASE PRESENTATION: We present a challenging scenario that ECG showed ST segment elevation, nevertheless, urgent coronary angiogram revealed non-obstructive coronary artery disease...
November 20, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29167053/autonomic-nervous-system-function-activity-patterns-and-sleep-after-physical-or-cognitive-challenge-in-people-with-chronic-fatigue-syndrome
#6
Erin Cvejic, Carolina X Sandler, Andrew Keech, Benjamin K Barry, Andrew R Lloyd, Uté Vollmer-Conna
OBJECTIVE: To explore changes in autonomic functioning, sleep, and physical activity during a post-exertional symptom exacerbation induced by physical or cognitive challenge in participants with chronic fatigue syndrome (CFS). METHODS: Thirty-five participants with CFS reported fatigue levels 24-h before, immediately before, immediately after, and 24-h after the completion of previously characterised physical (stationary cycling) or cognitive (simulated driving) challenges...
December 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/29149877/key-bottlenecks-to-the-provision-of-safe-obstetric-anaesthesia-in-low-income-countries-a-cross-sectional-survey-of-64-hospitals-in-uganda
#7
Isabella Epiu, Agnes Wabule, Andrew Kambugu, Harriet Mayanja-Kizza, Jossy Verel Bahe Tindimwebwa, Gerald Dubowitz
BACKGROUND: Despite recent advances in surgery and anaesthesia which significantly improve safety, many health facilities in low-and middle-income countries (LMICs) remain chronically under-resourced with inability to cope effectively with serious obstetric complications (Knight et al., PLoS One 8:e63846, 2013). As a result many of these countries still have unacceptably high maternal and neonatal mortality rates. Recent data at the national referral hospitals in East Africa reported that none of the national referral hospitals met the World Federation of Societies of Anesthesiologists (WFSA) international standards required to provide safe obstetric anaesthesia (Epiu I: Challenges of Anesthesia in Low-and Middle-Income Countries...
November 17, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29146296/anomalous-origin-of-coronary-arteries-from-the-wrong-sinus-in-athletes-diagnosis-and-management-strategies
#8
Vincenzo Palmieri, Salvatore Gervasi, Massimiliano Bianco, Roberta Cogliani, Barbara Poscolieri, Francesco Cuccaro, Riccardo Marano, Mario Mazzari, Cristina Basso, Paolo Zeppilli
AIMS: Although anomalous origin of left (AOLCA) and right coronary artery (AORCA) from the wrong sinus may cause sudden death (SD) in athletes, early diagnosis and management of these anomalies are still challenging. We analysed clinical/instrumental profiles of athletes identified with AOLCA/AORCA focusing our attention on diagnosis, management and follow-up. METHODS AND RESULTS: We report 23 athletes (17 males, mean age 27±17yrs.), 6 with AOLCA and 17 with AORCA...
November 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29145270/study-on-the-adverse-effects-following-chemotherapy-for-breast-cancer-diagnosis-during-pregnancy-the-first-case-report-in-china
#9
Xin Ye, Qi He, Xiaoyun Zhou
RATIONALE: Treatment of breast cancer during pregnancy (BCP) remains a challenge to physicians. Surgery and chemotherapy during pregnancy are widely used for the treatment of BCP. Herein, we reported 3 Chinese patients with BCP who underwent chemotherapy during pregnancy and were followed up for adverse effects. PATIENT CONCERNS: Three female patients (case 1, case 2, and case 3) of 37-, 32-, and 28-year-old with breast masses were enrolled. Case 1 had been pregnant for over 4 months, case 2 over 7 months, and case 3 for 7 months...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29129386/atrial-fibrillation-in-patients-on-haemodialysis-in-andalusia-prevalence-clinical-profile-and-therapeutic-management
#10
Carmen Sánchez Perales, Teresa Vázquez Sánchez, Daniel Salas Bravo, Sonia Ortega Anguiano, Eduardo Vázquez Ruiz de Castroviejo
Atrial fibrillation (AF) represents an important social and healthcare problem. There is wide variability in the prevalence of this arrhythmia in studies analysing patients on haemodialysis (HD). OBJECTIVE: To investigate the prevalence, clinical profile and therapeutic management of patients with AF on HD in Andalusia. METHODS: We asked the public healthcare system of Andalusia to provide us with the number of patients who were being treated with HD. We asked attending nephrologists from all hospital and outpatient centres in 5 of the 8 Andalusian provinces to perform an electrocardiogram and to fill out a questionnaire on patients selected by simple random sampling...
November 9, 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29128143/influence-of-type-of-sport-on-cardiac-repolarization-assessed-by-electrocardiographic-t-wave-morphology-combination-score
#11
Susanne Glasius Tischer, Claus Graff, Christina Ellervik, Eva Prescott, Jørgen K Kanters, Hanne Kruuse Rasmusen
INTRODUCTION: Interpreting repolarization changes in the electrocardiograms of athletes present a clinical challenge. AIM: Assessment of cardiac repolarization by T-wave morphology using the Morphology Combination Score (MCS), and evaluate how this quantitative description of T-wave morphology was influenced by the sport performed. MATERIALS AND METHODS: Digital electrocardiograms of 469 young elite athletes were analyzed for T-wave asymmetry, flatness and notching, and combined in the MCS...
September 29, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29110883/linear-and-nonlinear-parameters-of-heart-rate-variability-in-ischemic-stroke-patients
#12
V Constantinescu, D Matei, V Costache, D Cuciureanu, C Arsenescu-Georgescu
INTRODUCTION: Cardiovascular system presents cortical modulation. Post-stroke outcome can be highly influenced by autonomic nervous system disruption. Heart rate variability (HRV) analysis is a simple non-invasive method to assess sympatho-vagal balance. OBJECTIVES: The purpose of this study was to investigate cardiac autonomic activity in ischemic stroke patients and to asses HRV nonlinear parameters beside linear ones. METHODS: We analyzed HRV parameters in 15 right and 15 left middle cerebral artery ischemic stroke patients, in rest condition and during challenge (standing and deep breathing)...
October 11, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29107952/hereditary-angioedema-assessing-the-hypothesis-for-underlying-autonomic-dysfunction
#13
Maddalena A Wu, Francesco Casella, Francesca Perego, Chiara Suffritti, Nada Afifi Afifi, Eleonora Tobaldini, Andrea Zanichelli, Chiara Cogliati, Nicola Montano, Marco Cicardi
BACKGROUND: Attacks of Hereditary Angioedema due to C1-inhibitor deficiency (C1-INH-HAE)are often triggered by stressful events/hormonal changes. OBJECTIVE: Our study evaluates the relationship between autonomic nervous system (ANS) and contact/complement system activation. METHODS: Twenty-three HAE patients (6 males, mean age 47.5±11.4 years) during remission and 24 healthy controls (8 males, mean age 45.3±10.6 years) were studied. ECG, beat-by-beat blood pressure, respiratory activity were continuously recorded during rest (10') and 75-degrees-head-up tilt (10')...
2017: PloS One
https://www.readbyqxmd.com/read/29105669/-ten-questions-on-brugada-syndrome
#14
Pietro Delise
Brugada syndrome is a possible cause of sudden cardiac death in subjects with characteristic ECG pattern (type 1 Brugada ECG pattern). Brugada ECG pattern is not infrequent in the general population and the challenge is to identify within a large population those patients who are really at risk. Unfortunately, this is a partially unresolved problem and this uncertainty determines an inhomogeneous behavior among doctors. Some of them overestimate the risk extensively indicating cardioverter-defibrillator implantation, others apply restrictive indications of guidelines, many are not able to decide without doubts...
November 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/29082335/atrial-fibrillation-trial-to-evaluate-real-world-procedures-for-their-utility-in-helping-to-lower-stroke-events-after-pulse-study-protocol-for-a-randomized-controlled-trial
#15
Tsung-Ta Hsieh, Meng Lee, Wen-Yi Huang, Sung-Chun Tang, Sheng-Feng Sung, Kuo-Husan Chang, Jiann-Der Lee, Tsong-Hai Lee, Yung-Sung Huang, Jiann-Shing Jeng, Chang-Min Chung, Yi-Ling Wu, Bruce Ovbiagele
BACKGROUND: Enhancing detection of undiagnosed atrial fibrillation (AF) in hospitalized patients with a recent ischemic stroke is important because of the treatment implications; especially since presence of paroxysmal AF may not be picked up in a single 12-lead electrocardiogram (ECG) test. While several trials have shown improved detection of AF with prolonged ECG monitoring, this strategy is associated with relatively high cost, labor intensity, and patient inconvenience, thereby making it challenging to routinely implement in all hospitals...
June 2017: Contemporary Clinical Trials Communications
https://www.readbyqxmd.com/read/29067908/evaluation-of-baseline-ecg-in-patients-undergoing-oral-flecainide-challenge-test-for-suspected-brugada-syndrome-an-analysis-of-lead-ii
#16
Maneesh K Rai, Mukund A Prabhu, Jayaprakash Shenthar, Natarajan Kumaraswamy U, Ritesh Vekariya, Padmanabh Kamath, Narasimha Pai, Ramanath L Kamath, Vivek Pillai
BACKGROUND AND OBJECTIVES: We analyzed Lead II in patients undergoing an Oral Flecainide Challenge test (FCT), to identify any pointers that could predict a positive FCT and thereby help in recognition of latent BS. METHODS: The following parameters in lead II were retrospectively analyzed from the pre-test ECG in 62 patients undergoing FCT for suspected BS: The presence or absence of S waves, S wave amplitude, duration and upslope duration; J point parameters- Early repolarization, QRS notch, and QRS Slur; ST segment parameters-lack of isoelectric ST segment, ST duration and QT interval...
July 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29064258/new-or-presumed-new-left-bundle-branch-block-in-patients-with-suspected-st-elevation-myocardial-infarction
#17
Vijaya K Pera, David M Larson, Scott W Sharkey, Ross F Garberich, Christopher J Solie, Yale L Wang, Jay H Traverse, Anil K Poulose, Timothy D Henry
AIMS: Using a comprehensive large prospective regional ST-elevation myocardial infarction (STEMI) system database, we evaluated the prevalence, clinical and angiographic characteristics, and outcomes in patients with ischemic symptoms and new or presumed new left bundle branch block (LBBB). We then tested a new hierarchical diagnosis and triage algorithm to identify more accurately new LBBB patients with an acute culprit lesion. METHODS AND RESULTS: From March 2003 to June 2013, 3903 consecutive STEMI patients were treated using the Minneapolis Heart Institute regional STEMI protocol including 131 patients (3...
February 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/29060665/robust-motion-artefact-resistant-circuit-for-calculation-of-mean-arterial-pressure-from-pulse-transit-time
#18
Tinish Bhattacharya, Ankesh Gupta, Salam ThoiThoi Singh, Sitikantha Roy, Anamika Prasad
Cuff-less and non-invasive methods of Blood Pressure (BP) monitoring have faced a lot of challenges like stability, noise, motion artefact and requirement for calibration. These factors are the major reasons why such devices do not get approval from the medical community easily. One such method is calculating Blood Pressure indirectly from pulse transit time (PTT) obtained from electrocardiogram (ECG) and Photoplethysmogram (PPG). In this paper we have proposed two novel analog signal conditioning circuits for ECG and PPG that increase stability, remove motion artefacts, remove the sinusoidal wavering of the ECG baseline due to respiration and provide consistent digital pulses corresponding to blood pulses/heart-beat...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060591/4d-real-time-phase-contrast-flow-mri-with-sparse-sampling
#19
Aiqi Sun, Bo Zhao, Rui Li, Chun Yuan
Conventional phase-contrast (PC) MRI relies on electrocardiogram (ECG)-synchronized cine acquisition and respiration control. It often results in relatively low data acquisition efficiency, and is unable to assess blood flow variabilities. Real-time imaging is a promising technique to overcome these limitations; however, it results in a challenging image reconstruction problem with highly-undersampled (k; t)-space data. This paper presents a novel model-based imaging method, which integrates low-rank modeling with parallel imaging, to enable 4D real-time PC MRI without ECG gating and respiration control...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060346/coherence-analysis-of-invasive-blood-pressure-and-its-noninvasive-indicators-for-improvement-of-cuffless-measurement-accuracy
#20
Xiao-Rong Ding, Bryan P Yan, Yuan-Ting Zhang, Jing Liu, Peng Su, Ni Zhao
Cuffless technology for blood pressure (BP) measurement offers great potential for unobtrusive monitoring of hypertension. However, the accuracy is still a challenging issue probably owning to the inadequacy of existing noninvasive BP indicators in tracking BP changes, i.e., either the poor trackability of the indicators or the lack of relationship to map the indicators to BP. To figure out the covariation of BP-related noninvasive indicators and BP, we propose to analyze the coherence of intra-arterial systolic BP (SBP) and a selected group of noninvasive indicators, including the mostly used pulse transit time (PTT), photoplethysmogram intensity ratio (PIR) and RR interval (RRI) of electrocardiogram (ECG), in both time domain, with singular spectrum analysis (SSA), and frequency domain, with cross-spectral analysis...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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