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https://www.readbyqxmd.com/read/27935075/nerve-conduction-studies-are-safe-in-patients-with-central-venous-catheters
#1
Zachary N London, Andrew Mundwiler, Hakan Oral, Gary W Gallagher
INTRODUCTION: It is unknown if central venous catheters bypass the skin's electrical resistance and engender a risk of nerve conduction study-induced cardiac arrhythmia. OBJECTIVE: To determine if nerve conduction studies affect cardiac conduction and rhythm in patients with central venous catheters. METHODS: Under continuous 12-lead electrocardiogram monitoring, subjects with and without central venous catheters underwent a series of upper extremity nerve conduction studies...
December 9, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27933514/changes-in-cardiac-repolarisation-during-spontaneous-nocturnal-hypoglycaemia-in-subjects-with-type-1-diabetes-a-preliminary-report
#2
Minna L Koivikko, Tuomas Kenttä, Pasi I Salmela, Heikki V Huikuri, Juha S Perkiömäki
AIMS: Experimental studies have revealed that hypoglycaemia can result in morphological changes in electrocardiographic repolarisation in subjects with type 1 diabetes. However, the influence of spontaneous nocturnal hypoglycaemia on repolarisation morphology in a 'real life' situation is not clear. METHODS: Adults with type 1 diabetes (n = 11) underwent continuous glucose monitoring with a subcutaneous sensor and digital 12-lead ECG recording for three nights...
December 8, 2016: Acta Diabetologica
https://www.readbyqxmd.com/read/27931763/usefulness-of-synthesized-18-lead-electrocardiography-in-the-diagnosis-of-st-elevation-myocardial-infarction-a-pilot-study
#3
Tadashi Ashida, Shigemasa Tani, Ken Nagao, Tsukasa Yagi, Naoya Matsumoto, Atsushi Hirayama
OBJECTIVE: This was a pilot retrospective case-series study performed to investigate whether synthesized 18-lead electrocardiogram (ECG) could improve the accuracy of infarction site diagnosis in patients presenting with ST-elevation myocardial infarction (STEMI). METHOD: Of 103 consecutive patients with acute coronary syndrome who underwent emergency coronary angiography between October 1, 2014 and December 10, 2015, 33 patients fulfilling the diagnostic criteria for STEMI were enrolled in this study...
November 25, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27930354/simultaneous-non-invasive-epicardial-and-endocardial-mapping-in-patients-with-brugada-syndrome-new-insights-into-arrhythmia-mechanisms
#4
Boris Rudic, Maria Chaykovskaya, Alexey Tsyganov, Vitaly Kalinin, Erol Tülümen, Theano Papavassiliu, Christina Dösch, Volker Liebe, Jürgen Kuschyk, Susanne Röger, Ibrahim El-Battrawy, Ibrahim Akin, Marina Yakovleva, Elena Zaklyazminskaya, Anna Shestak, Stanislav Kim, Mikhail Chmelevsky, Martin Borggrefe
BACKGROUND: The underlying mechanisms of Brugada syndrome (BrS) are not completely understood. Recent studies provided evidence that the electrophysiological substrate, leading to electrocardiogram abnormalities and/or ventricular arrhythmias, is located in the right ventricular outflow tract (RVOT). The purpose of this study was to examine abnormalities of epicardial and endocardial local unipolar electrograms by simultaneous noninvasive mapping in patients with BrS. METHODS AND RESULTS: Local epicardial and endocardial unipolar electrograms were analyzed using a novel noninvasive epi- and endocardial electrophysiology system (NEEES) in 12 patients with BrS and 6 with right bundle branch block for comparison...
November 14, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27929570/short-runs-of-atrial-arrhythmia-and-stroke-risk-a-european-wide-online-survey-among-stroke-physicians-and-cardiologists
#5
R T Tran, A J Rankin, A H Abdul-Rahim, G Y Lip, A C Rankin, K R Lees
A recording of = 30 seconds is required to diagnose paroxysmal atrial fibrillation when using ambulatory ECG monitoring. It is unclear if shorter runs are relevant with regards to stroke risk. Methods An online survey of cardiologists and stroke physicians was carried out to assess current management of patients with short runs of atrial arrhythmia within Europe. Results Respondents included 311 clinicians from 32 countries. To diagnose atrial fibrillation, 80% accepted a single 12-lead ECG and 36% accepted a single run of > 30 seconds on ambulatory monitoring...
June 2016: Journal of the Royal College of Physicians of Edinburgh
https://www.readbyqxmd.com/read/27925329/fragmented-qrs-is-a-novel-risk-factor-for-ventricular-arrhythmic-events-after-receiving-cardiac-resynchronization-therapy-in-non-ischemic-cardiomyopathy
#6
Miyako Igarashi, Hiroshi Tada, Hiro Yamasaki, Kenji Kuroki, Tomoko Ishizu, Yoshihiro Seo, Takeshi Machino, Nobuyuki Murakoshi, Yukio Sekiguchi, Yuichi Noguchi, Akihiko Nogami, Kazutaka Aonuma
INTRODUCTION: A fragmented QRS (fQRS) is reported to be associated with a poor prognosis or sudden cardiac death (SCD) in patients with Brugada syndrome or ischemic heart disease. However, no studies have clarified the impact of the presence of an fQRS on SCD or ventricular arrhythmic events in patients receiving cardiac resynchronization therapy (CRT). This study aimed to clarify this point in patients with non-ischemic cardiomyopathy. METHODS AND RESULTS: This study included 137 heart failure patients with non-ischemic cardiomyopathy who received CRT (NYHA functional class: II/III/IV = 25/84/28)...
December 7, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27924760/p-wave-dispersion-an-update
#7
REVIEW
Andrés Ricardo Pérez-Riera, Luiz Carlos de Abreu, Raimundo Barbosa-Barros, José Grindler, Acácio Fernandes-Cardoso, Adrian Baranchuk
P-wave dispersion (PWD, Pd or Pdis) is a noninvasive electrocardiographic (ECG) marker for atrial remodeling and predictor for atrial fibrillation (AF). PWD is defined as the difference between the widest and the narrowest P-wave duration recorded from the 12 ECG leads. Increased P-wave duration and PWD reflect prolongation of intraatrial and interatrial conduction time with lack of a well-coordinated conduction system within the atrial muscles, with inhomogeneous, asynchronic, pro-inflammatory and anti-inflammatory effect mediated by interleukin-6 (IL-6) in patients with the CG + GG genotype IL-6 -634C/G polymorphism [1] and discontinuous propagation of sinus impulses mainly between the left and right atria, interstitial/extracellular fibroblast activation and collagen deposition with fibrosis (via TGF-β) in atrial tissue, insufficient blood supply, significant not isotropic myoelectric activity, and thin wall thickness and consequent expansion tendency all well-known electrophysiological characteristics in patients with atrial arrhythmias and especially paroxysmal atrial fibrillation (PAF) [2]...
July 2016: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/27915267/occurrence-of-simultaneous-cathodal-anodal-capture-with-left-ventricular-quadripolar-leads-for-cardiac-resynchronization-therapy-an-electrocardiogram-evaluation
#8
Eraldo Occhetta, Gabriele Dell'Era, Ailia Giubertoni, Andrea Magnani, Francesco Rametta, Alessandro Blandino, Vincenzo Magnano, Maurizio Malacrida, Paolo Marino
AIMS: The occurrence of left ventricular (LV) anodal activation during pacing with modern multipolar cardiac resynchronization therapy (CRT) systems has never been reported. The aim of our study was to demonstrate, by means of electrocardiogram (ECG) analysis, the occurrence of simultaneous cathodal-anodal LV capture with quadripolar LV leads. METHODS AND RESULTS: We studied 10 first-time recipients of a CRT device equipped with a quadripolar LV lead. During follow-up, standard supine 12-lead ECGs were obtained in available cathode-to-anode LV pacing configurations with a pulse amplitude equal to twice the pacing threshold...
December 2, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27914360/white-blood-cell-count-and-new-onset-atrial-fibrillation-after-cardiac-surgery
#9
Kirolos A Jacob, Marc P Buijsrogge, Jos F Frencken, Maarten J Ten Berg, Willem J L Suyker, Diederik van Dijk, Jan M Dieleman
BACKGROUND: Postoperative new-onset atrial fibrillation (PNAF) is the most common complication following cardiac surgery. The inflammatory response, as a potential underlying mechanism, has been extensively studied. In small studies, the white blood cell count (WBC) has been shown to be the only consistent inflammatory marker associated with PNAF. This study aimed to determine the association between perioperative WBC response and PNAF in a larger study cohort. METHODS: Patients ≥18years, undergoing elective cardiac surgery with a preoperative sinus rhythm were included...
November 17, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27909532/ajmaline-challenge-to-unmask-infrahisian-disease-in-patients-with-recurrent-and-unexplained-syncope-preserved-ejection-fraction-with-or-without-conduction-abnormalities-on-surface-ecg
#10
Francesco Pentimalli, Luca Bacino, Matteo Ghione, Giambattista Siri, Massimo Gazzarata, Paolo Bellotti
Background: Pharmacological challenge with class I antiarrhythmic drug is a recommended diagnostic test in patients with unexplained syncope only in the presence of bundle branch block, when non-invasive tests have failed to make the diagnosis. Its role in patients with minor or no conduction disturbances on 12-leads ECG has not been evaluated yet. It is also not clear which are the values of His-Ventricular interval to be considered diagnostic. We sought to evaluate the role of ajmaline challenge in unmasking the presence of an infrahisian disease in patients with recurrent and unexplained syncope, regardless of the existence of conduction disturbances on surface ECG...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27908843/treatment-of-acute-coronary-syndrome-by-telemedically-supported-paramedics-compared-with-physician-based-treatment-a-prospective-interventional-multicenter-trial
#11
Jörg C Brokmann, Clemens Conrad, Rolf Rossaint, Sebastian Bergrath, Stefan K Beckers, Miriam Tamm, Michael Czaplik, Frederik Hirsch
BACKGROUND: Prehospital treatment of acute coronary syndrome (ACS) in German emergency medical services (EMSs) is reserved for EMS physicians due to legal issues. OBJECTIVE: The objective of this prospective, interventional, multicenter trial was to evaluate the quality of telemedically-delegated therapy and the possible complications in patients with ACS. METHODS: After approval by the ethics committee and trial registration, a one-year study phase was started in August 2012 with 5 ambulances, telemedically equipped and staffed with paramedics, in 4 German EMS districts...
December 1, 2016: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/27904509/a-new-diagnostic-tool-for-masked-hypertension-impaired-sleep-quality
#12
Fatma Erdem, Ugur Cakır, Osman Yıldırım, Aytekin Alcelik, Ibrahim Donmez, Taha Can Tuman, Sabri Onur Caglar, Alim Erdem, Mehmet Yazıcı
INTRODUCTION: The aim of this study was to evaluate the relationship between masked hypertension and impaired sleep quality. Additionally, we evaluated the diagnostic role and prevalence of poor sleep quality among patients with newly diagnosed masked hypertension. MATERIAL AND METHODS: A total of 112 individuals, 72 patients with newly diagnosed masked hypertension and 40 normotensive healthy volunteers, were included in this study. All patients underwent evaluation comprising 12-lead electrocardiography, transthoracic echocardiography, 24-hour Holter ECG, and basic laboratory tests...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27898406/low-incidence-of-atrial-fibrillation-in-patients-with-transient-ischemic-attack
#13
Kenneth Bruun Pedersen, Alexander Chemnitz, Charlotte Madsen, Niels C F Sandgaard, Søren Bak, Axel Brandes
BACKGROUND: Atrial fibrillation (AF) is a major cause of stroke. Therefore, all patients with ischemic stroke or transient ischemic attack (TIA) should be examined with 12-lead electrocardiogram (ECG) and continuous monitoring to detect AF. Current guidelines recommend at least 24 h continuous ECG monitoring, which is primarily based on studies investigating patients with ischemic stroke. The aim of our study was to investigate the diagnostic yield of 12-lead ECG and Holter monitoring in patients with TIA...
November 30, 2016: Cerebrovascular Diseases Extra
https://www.readbyqxmd.com/read/27889554/familial-dilated-cardiomyopathy-a-multidisciplinary-entity-from-basic-screening-to-novel-circulating-biomarkers
#14
REVIEW
D de Gonzalo-Calvo, M Quezada, O Campuzano, A Perez-Serra, J Broncano, R Ayala, M Ramos, V Llorente-Cortes, S Blasco-Turrión, F J Morales, P Gonzalez, R Brugada, A Mangas, R Toro
Idiopathic dilated cardiomyopathy has become one of the most prevalent inherited cardiomyopathies over the past decades. Genetic screening of first-degree relatives has revealed that 30-50% of the cases have a familial origin. Similar to other heart diseases, familial dilated cardiomyopathy is characterized by a high genetic heterogeneity that complicates family studies. Cli'nical screening, 12-lead electrocardiogram and transthoracic echocardiogram are recommended for patients and first-degree family members...
November 8, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27889043/pr-interval-components-and-atrial-fibrillation-risk-from-the-atherosclerosis-risk-in-communities-study
#15
Justin W Smith, Wesley T O'Neal, M Benjamin Shoemaker, Lin Y Chen, Alvaro Alonso, S Patrick Whalen, Elsayed Z Soliman
Reports on the association between the PR-interval and atrial fibrillation (AF) are conflicting. We hypothesized that inconsistencies stem from that fact that the PR-interval represents a composite of several distinct components. We examined the associations of the PR-interval and its components (P-wave onset to P-wave peak duration, P-wave peak to P-wave end duration, and PR-segment) with incident AF in 14,924 participants (mean age 54 ± 5.8 years; 26% black; 55% women) from the Atherosclerosis Risk In Communities study...
November 1, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27888398/the-value-of-the-electrocardiogram-for-evaluating-prognosis-in-patients-with-idiopathic-pulmonary-arterial-hypertension
#16
Xiao-Ling Cheng, Jian-Guo He, Zhi-Hong Liu, Qing Gu, Xin-Hai Ni, Zhi-Hui Zhao, Qin Luo, Chang-Ming Xiong
BACKGROUND: Association between electrocardiography (ECG) features and right ventricular anatomy and physiology has been established. This study is aimed to identify the value of 12-lead ECG in evaluating prognosis of patients with idiopathic pulmonary arterial hypertension (IPAH). METHOD: 194 patients with newly diagnosed IPAH were included in this study. Correlations between electrocardiography variables and hemodynamics were assessed. Univariate and multivariable cox regression analysis were performed to identify ECG variables for predicting all-cause mortality in IPAH...
November 25, 2016: Lung
https://www.readbyqxmd.com/read/27878421/the-role-of-the-atrial-electromechanical-delay-in-predicting-atrial-fibrillation-in-beta-thalassemia-major-patients
#17
Anna Rago, Vincenzo Russo, Andrea Antonio Papa, Carmine Ciardiello, Bruno Pannone, Maria Carolina Mayer, Giovanni Cimmino, Gerardo Nigro
BACKGROUND: Paroxysmal atrial tachyarrhythmias frequently occur in beta-thalassemia major (β-TM) patients. The aim of the current study was to evaluate the atrial electromechanical delay (AEMD) in a large β-TM population with normal cardiac function and its relationship to atrial fibrillation (AF) onset. METHODS: Eighty β-TM patients (44 men, 36 women), with a mean age of 36.2 ± 11.1 years, and 80 healthy subjects used as controls, matched for age and gender, were studied for the occurrence of AF during a 5-year follow-up, through 30-day external loop recorder (ELR) monitoring performed every 6 months...
November 22, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27878364/-av-reentrant-tachycardia-and-wolff-parkinson-white-syndrome-diagnosis-and-treatment
#18
Frederik Voss, Lars Eckardt, Sonia Busch, Heidi L Estner, Daniel Steven, Philipp Sommer, Christian von Bary, Hans-Ruprecht Neuberger
The AV-reentrant tachycardia (AVRT) is a supraventricular tachycardia with an incidence of 1-3/1000. The pathophysiological basis is an accessory atrioventricular pathway (AP). Patients with AVRT typically present with palpitations, an on-off characteristic, anxiety, dyspnea, and polyuria. This type of tachycardia may often be terminated by vagal maneuvers. Although the clinical presentation of AVRT is quite similar to AV-nodal reentrant tachycardias, the correct diagnosis is often facilitated by analyzing a standard 12-lead ECG at normal heart rate showing ventricular preexcitation...
November 22, 2016: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/27875737/experimental-evidence-for-a-severe-proarrhythmic-potential-of-levosimendan
#19
Gerrit Frommeyer, Anja Kohnke, Christian Ellermann, Dirk G Dechering, Simon Kochhäuser, Christian Pott, Michael Fehr, Lars Eckardt
BACKGROUND: The calcium sensitizer levosimendan is established for therapy of acutely decompensated congestive heart failure. Clinical experience suggests a possible proarrhythmic potential. The aim of the present study was to assess possible proarrhythmic effects and underlying electrophysiological mechanisms. METHODS AND RESULTS: Ten rabbit hearts were isolated and Langendorff-perfused. Thereafter, levosimendan was infused in 3 concentrations (0.5, 1, and 2μM)...
November 14, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27873284/a-case-of-acute-myocardial-infarction-due-to-cardiovascular-syphilis-with-aortic-regurgitation-and-bilateral-coronary-ostial-stenosis
#20
Mutsuo Tanaka, Minoru Okamoto, Toshihiko Murayama
We report an interesting case of a 66-year-old man with acute myocardial infarction (AMI) with bilateral coronary ostial stenosis cardiovascular syphilis complicated by aortic regurgitation (AR). A 12-lead electrocardiogram and blood tests on arrival suggested AMI, and echocardiography showed moderate AR. Emergency coronary angiography showed bilateral coronary ostial stenosis. The patient underwent emergency surgical treatment, coronary artery bypass grafting, and aortic valve replacement with a bioprosthetic valve...
December 2016: Surgical Case Reports
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