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Atrial fibrillation with rapid ventricular rate

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https://www.readbyqxmd.com/read/29102101/iodinated-contrast-administration-resulting-in-cardiogenic-shock-in-patient-with-uncontrolled-graves-disease
#1
Wes Brundridge, Jack Perkins
BACKGROUND: Thyroid storm (also known as thyroid or thyrotoxic crisis) is part of the spectrum of thyrotoxicosis and represents the extreme end of that spectrum. The condition is quite rare, yet mortality rates are high and may approach 10-30%. CASE REPORT: A 34-year-old-man who had a history of Graves disease presented in atrial fibrillation with rapid ventricular response and mild congestive heart failure. During the course of his Emergency Department (ED) stay he deteriorated into cardiogenic shock...
October 25, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29055615/achieving-ventricular-rate-control-in-patients-taking-chronic-beta-blocker-therapy
#2
Megan E Feeney, Sandra L B Rowe, Nathan D Mah, Cassie A Barton, Ran Ran
STUDY OBJECTIVE: The objective of this study is to evaluate the difference in response to ventricular rate control with intravenous (IV) metoprolol compared to IV diltiazem in patients taking chronic beta-blocker therapy who present to the emergency department (ED) in atrial fibrillation (AF) with rapid ventricular rate (RVR). METHODS: This was a single-center, retrospective study of adult patients taking chronic oral metoprolol. Chronic metoprolol therapy was defined as patients prescribed and taking oral metoprolol within 5days of study inclusion...
September 11, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29016724/triggered-intracellular-calcium-waves-in-dog-and-human-left-atrial-myocytes-from-normal-and-failing-hearts
#3
Gary L Aistrup, Rishi Arora, Søren Grubb, Shin Yoo, Benjamin Toren, Manvinder Kumar, Aaron Kunamalla, William Marszalec, Tej Motiwala, Shannon Tai, Sean Yamakawa, Satya Yerrabolu, Francisco J Alvarado, Hector H Valdivia, Jonathan M Cordeiro, Yohannes Shiferaw, John Andrew Wasserstrom
Aims: Abnormal intracellular Ca2+ cycling contributes to triggered activity and arrhythmias in the heart. We investigated the properties and underlying mechanisms for systolic triggered Ca2+ waves in left atria from normal and failing dog hearts. Methods and results: Intracellular Ca2+ cycling was studied using confocal microscopy during rapid pacing of atrial myocytes (36 °C) isolated from normal and failing canine hearts (ventricular tachypacing model). In normal atrial myocytes (NAMs), Ca2+ waves developed during rapid pacing at rates ≥ 3...
November 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28993851/usefulness-of-the-wcd-in-patients-with-suspected-tachymyopathy
#4
Julia W Erath, Mate Vamos, Alexander P Benz, Stefan H Hohnloser
AIMS: The wearable cardioverter defibrillator (WCD) is used for temporary protection of patients deemed to be at high risk for sudden death. There is limited experience regarding the clinical development of patients with tachymyopathy. We aimed to evaluate the clinical development of tachymyopathy patients protected with a WCD in a single-center non-randomized patient cohort. METHODS AND RESULTS: We fitted 130 consecutive patients deemed to be at high risk for ventricular tachyarrhythmias with the WCD...
October 9, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28902899/selective-autonomic-stimulation-of-the-av-node-fat-pad-to-control-rapid-post-operative-atrial-arrhythmias
#5
Marco A Mercader, Dingchao He, Aditya C Sharma, Mark C Marchitto, Gregory Trachiotis, Gene A Bornzin, Richard Jonas, Jeffrey P Moak
Junctional ectopic tachycardia (JET) and atrial fibrillation (AF) occur in patients recovering from open-heart surgery (OHS). Pharmacologic treatment is used for the control of post-operative atrial arrhythmias (POAA), but is associated with side effects. There is a need for a reversible, modulated solution to rate control. We propose a non-pharmacologic technique that can modulate AV nodal conduction in a selective fashion. Ten mongrel dogs underwent OHS. Stimulation of the anterior right (AR) and inferior right (IR) fat pad (FP) was done using a 7-pole electrode...
2017: PloS One
https://www.readbyqxmd.com/read/28767580/metastatic-cardiac-tumor-presenting-as-atrial-fibrillation-in-a-previously-healthy-woman-a-case-report
#6
Chi-Wen Cheng, Ning-I Yang, Koon-Kwan Ng, Wen-Jin Cherng
RATIONALE: Metastatic cardiac tumor (MCT) is rare in clinical practice. MCT presenting initially as atrial fibrillation (AF) is even rarer. PATIENT CONCERNS: We report a 47-year-old woman with no previous medical history presented with intermittent palpitation for 3 days. DIAGNOSES: The electrocardiography showed AF with rapid ventricular rate. The transthoracic echocardiography showed a 4 × 4 cm mass occupying the left atrium (LA)...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28762929/-risk-factors-of-cardiovascular-complications-after-beating-heart-coronary-artery-bypass-grafting-in-patients-with-type-two-diabetes
#7
S Y Borodashkina, K V Protasov, V A Podkamennyi
AIM: to determine risk factors of early cardiovascular complications after beating-heart coronary artery bypass grafting (CABG) in patients with ischemic coronary disease (IHD) and type two diabetes (D2). MATERIALS AND METHODS: We included into this study 188 patients (mean age 59 years, 85.1% men) with IHD and D2 who underwent off-pump CABG. The following cardiovascular complications (CVC) registered within 7 days after surgery were analyzed: myocardial infarction (MI), stroke/transient ischemic attack (S/TIA), atrial fibrillation (AF)...
March 2017: Kardiologiia
https://www.readbyqxmd.com/read/28725332/thyrotoxic-valvulopathy-case-report-and-review-of-the-literature
#8
Keniel Pierre, Sushee Gadde, Bassam Omar, G Mustafa Awan, Christopher Malozzi
We report a 42-year-old female who was admitted for abdominal pain, and also endorsed dyspnea, fatigue and chronic palpitations. Past medical history included asthma, patent ductus arteriosus repaired in childhood and ill-defined thyroid disease. Physical examination revealed blood pressure of 136/88 mm Hg and heart rate of 149 beats per minute. Cardiovascular exam revealed an irregularly irregular rhythm, and pulmonary exam revealed mild expiratory wheezing. Abdomen was tender. Electrocardiogram revealed atrial fibrillation with rapid ventricular response which responded to intravenous diltiazem...
June 2017: Cardiology Research
https://www.readbyqxmd.com/read/28720191/sustained-accelerated-idioventricular-rhythm-in-a-centrifuge-simulated-suborbital-spaceflight
#9
Rahul Suresh, Rebecca S Blue, Charles Mathers, Tarah L Castleberry, James M Vanderploeg
INTRODUCTION: Hypergravitational exposures during human centrifugation are known to provoke dysrhythmias, including sinus dysrhythmias/tachycardias, premature atrial/ventricular contractions, and even atrial fibrillations or flutter patterns. However, events are generally short-lived and resolve rapidly after cessation of acceleration. This case report describes a prolonged ectopic ventricular rhythm in response to high G exposure. CASE REPORT: A previously healthy 30-yr-old man voluntarily participated in centrifuge trials as a part of a larger study, experiencing a total of 7 centrifuge runs over 48 h...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28666575/alternans-in-atria-mechanisms-and-clinical-relevance
#10
REVIEW
Giedrius Kanaporis, Lothar A Blatter
Atrial fibrillation is the most common sustained arrhythmia and its prevalence is rapidly rising with the aging of the population. Cardiac alternans, defined as cyclic beat-to-beat alternations in contraction force, action potential (AP) duration and intracellular Ca(2+) release at constant stimulation rate, has been associated with the development of ventricular arrhythmias. Recent clinical data also provide strong evidence that alternans plays a central role in arrhythmogenesis in atria. The aim of this article is to review the mechanisms that are responsible for repolarization alternans and contribute to the transition from spatially concordant alternans to the more arrhythmogenic spatially discordant alternans in atria...
2017: Medicina
https://www.readbyqxmd.com/read/28617967/holter-monitored-sudden-cardiac-arrest-after-atrioventricular-junction-ablation
#11
Victor Waldmann, Eloi Marijon, Nicolas Combes
We present a case of sudden cardiac arrest 7 hours after radiofrequency ablation of the atrioventricular junction for symptomatic permanent atrial fibrillation unresponsive to medical therapy. The Holter monitoring revealed a progressive increasing of QT interval after the procedure, highlighting the repolarization instability after acute changes in heart rates associated with modification of ventricular activation, leading to occurrence of short coupling interval ventricular extra beats and finally to a "torsade de pointes...
June 15, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28602671/atrial-fibrillation-in-hypertrophic-cardiomyopathy
#12
REVIEW
Kaivan Vaidya, Christopher Semsarian, Kim H Chan
Hypertrophic cardiomyopathy (HCM) is an inherited cardiac disorder with a spectrum of clinical manifestations. Patients with HCM are predisposed to developing atrial fibrillation (AF) due primarily to advanced diastolic dysfunction and left atrial (LA) dilatation and remodelling. Atrial fibrillation causes a progressive symptomatic and functional decline, as well as increased thromboembolic risk and mortality, particularly in the setting of rapid ventricular rates and left ventricular outflow tract (LVOT) obstruction...
May 23, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28583554/enterobacter-cloacae-related-necrotizing-fasciitis-after-peritoneal-dialysis-in-delayed-graft-function-a-case-report
#13
Y-M Choe, K-M Park, Y S Jeon, S G Cho, K C Hong, W Y Shin, J H Song
INTRODUCTION: Necrotizing fasciitis is an uncommon soft-tissue infection that involves the superficial fascia, subcutaneous fat, and deep fascia. Herein, we report the first case of Enterobacter cloacae-related necrotizing fasciitis after peritoneal dialysis in delayed graft function. CASE: A 58-year-old man, who was a hepatitis B-viral carrier and had atrial fibrillation, received cadaveric renal transplantation with peritoneal dialysis and encountered delayed graft function...
June 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28542844/the-inward-rectifier-current-inhibitor-pa-6-terminates-atrial-fibrillation-and-does-not-cause-ventricular-arrhythmias-in-goat-and-dog-models
#14
Yuan Ji, Rosanne Varkevisser, Dragan Opacic, Alexandre Bossu, Marion Kuiper, Jet D M Beekman, Sihyung Yang, Azinwi Phina Khan, Dobromir Dobrev, Niels Voigt, Michael Zhuo Wang, Sander Verheule, Marc A Vos, Marcel A G van der Heyden
BACKGROUND AND PURPOSE: The density of the inward rectifier current (IK1 ) increases in atrial fibrillation (AF), shortening effective refractory period and thus promoting atrial re-entry. The synthetic compound pentamidine analogue 6 (PA-6) is a selective and potent IK1 inhibitor. We tested PA-6 for anti-AF efficacy and potential proarrhythmia, using established models in large animals. EXPERIMENTAL APPROACH: PA-6 was applied i.v. in anaesthetized goats with rapid pacing-induced AF and anaesthetized dogs with chronic atrio-ventricular (AV) block...
August 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28340057/long-term-outcome-of-pulmonary-vein-isolation-in-patients-with-paroxysmal-atrial-fibrillation-and-brugada-syndrome
#15
Giacomo Mugnai, Burak Hünük, Erwin Ströker, Diego Ruggiero, Hugo Enrique Coutino-Moreno, Ken Takarada, Valentina De Regibus, Rajin Choudhury, Juan Pablo Abugattas de Torres, Darragh Moran, Saverio Iacopino, Pasquale Filannino, Giulio Conte, Juan Sieira, Jan Poelaert, Stefan Beckers, Pedro Brugada, Carlo de Asmundis, Gian-Battista Chierchia
Aims: The therapeutical management of atrial fibrillation (AF) in the setting of Brugada syndrome (BS) might be challenging as many antiarrhythmic drugs (AADs) with sodium channel blocking properties might lead to to the development of ventricular arrhythmias. This study sought to evaluate the clinical outcome in a consecutive series of patients with BS having undergone pulmonary vein (PV) isolation by means of radiofrequency (RF) or cryoballoon (CB) ablation and the efficacy of catheter ablation for preventing inappropriate interventions delivered by implantable cardioverter defibrillators (ICD) on a 3-year follow up...
March 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28336184/atrial-fibrillation-management-in-a-breeding-stallion
#16
N Heliczer, K Mitchell, O Lorello, J Dauvillier, D Burger, C C Schwarzwald, C Navas de Solis
A 20-year-old warmblood breeding stallion presented to a University practice for semen collection and evaluation was incidentally diagnosed with atrial fibrillation (AF). Electrocardiogram recordings during breeding revealed inappropriately rapid tachycardia and occasional ventricular premature depolarizations/aberrant ventricular conduction. Transvenous electrical cardioversion was performed. After successful cardioversion the horse displayed supraventricular ectopy and atrial contractile dysfunction and was administered sotalol hydrochloride in an attempt to decrease the risk of AF recurrence...
March 20, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/28329110/mid-term-outcomes-of-concomitant-surgical-ablation-of-atrial-fibrillation-in-patients-undergoing-cardiac-surgery-for-hypertrophic-cardiomyopathy%C3%A2
#17
Elisabetta Lapenna, Alberto Pozzoli, Michele De Bonis, Giovanni La Canna, Teodora Nisi, Simona Nascimbene, Luca Vicentini, Stefania Di Sanzo, Benedetto Del Forno, Davide Schiavi, Ottavio Alfieri
OBJECTIVES: Atrial fibrillation (AF) is common in patients with hypertrophic cardiomyopathy (HCM) and it is often poorly tolerated because of loss of atrial contraction and reduced filling time with rapid ventricular rates. Restoring sinus rhythm is of great clinical benefit to HCM patients. Very few data exist regarding surgical ablation of concomitant AF in this setting. The aim of this study was to evaluate the mid-term outcome of surgical AF ablation in patients who underwent cardiac surgery due to HCM...
June 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28328711/management-of-atrial-fibrillation-with-rapid-ventricular-response-in-the-intensive-care-unit-a-secondary-analysis-of-electronic-health-record-data
#18
Ari Moskowitz, Kenneth P Chen, Avraham Z Cooper, Abdullah Chahin, Mohammad M Ghassemi, Leo Anthony Celi
PURPOSE: Atrial fibrillation with rapid ventricular response (RVR) is common during critical illness. In this study, we explore the comparative effectiveness of three commonly used drugs (metoprolol, diltiazem, and amiodarone) in the management of atrial fibrillation with RVR in the intensive care unit (ICU). METHODS: Data pertaining to the first ICU admission were extracted from the Medical Information Mart for Intensive Care III database. Patients who received one of the above pharmacologic agents while their heart rate was > 110 bpm and had atrial fibrillation documented in the clinical chart were included...
October 2017: Shock
https://www.readbyqxmd.com/read/28286836/intravenous-amiodarone-versus-digoxin-in-atrial-fibrillation-rate-control-a-clinical-trial
#19
Majid Shojaee, Bahareh Feizi, Reza Miri, Jalil Etemadi, Amir Hossein Feizi
INTRODUCTION: Treatment of rapid ventricular response arterial fibrillation (rapid AF) varies depending on the decision of the in-charge physician, condition of the patient, availability of the drug, and the treatment protocol of the hospital. The present study was designed aiming to compare IV digoxin and amiodarone in controlling the heart rate of patients presenting to emergency department with rapid AF and relative contraindication for first line drug in this regard. METHOD: In the present clinical trial, patients presented to the ED with rapid AF and relative contraindication for calcium channel blockers and beta-blockers were treated with either IV amiodarone or IV digoxin and compared regarding success rate and complication using SPSS version 22...
2017: Emergency (Tehran, Iran)
https://www.readbyqxmd.com/read/28190945/mems-based-flexible-force-sensor-for-tri-axial-catheter-contact-force-measurement
#20
Hardik J Pandya, Jun Sheng, Jaydev P Desai
Atrial fibrillation (AFib) is a significant healthcare problem caused by the uneven and rapid discharge of electrical signals from pulmonary veins (PVs). The technique of radiofrequency (RF) ablation can block these abnormal electrical signals by ablating myocardial sleeves inside PVs. Catheter contact force measurement during RF ablation can reduce the rate of AFib recurrence, since it helps to determine effective contact of the catheter with the tissue, thereby resulting in effective power delivery for ablation...
February 2017: Journal of Microelectromechanical Systems
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