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Atrial fibrillation calcium

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https://www.readbyqxmd.com/read/29452989/prognostic-role-of-cardiac-calcifications-in-primary-prevention-a-powerful-marker-of-adverse-outcome-highly-dependent-on-underlying-cardiac-rhythm
#1
Carmine Mazzone, Gianni Cioffi, Concetta Di Nora, Giulia Barbati, Federica Guidetti, Pompilio Faggiano, Nicola Gaibazzi, Giorgio Faganello, Endria Casanova Borca, Andrea Di Lenarda
BACKGROUND: Increasing evidence exists regarding calcium detected in aortic cusps and/or mitral annulus (AOC_MAC) at transthoracic echocardiogram as a predictor of cardiovascular (CV) events and mortality. PURPOSE: To verify whether AOC_MAC has a prognostic role in the setting of primary prevention independently of the presence of atrial fibrillation (AF). METHODS: All subjects consecutively referred from January 2011 to October 2014 to the Cardiovascular Centre for CV risk assessment in primary prevention were selected...
January 31, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29395765/emergency-medicine-considerations-in-atrial-fibrillation
#2
REVIEW
Brit Long, Jennifer Robertson, Alex Koyfman, Kurian Maliel, Justin R Warix
BACKGROUND: Atrial fibrillation (AF) is an abnormal heart rhythm which may lead to stroke, heart failure, and death. Emergency physicians play a role in diagnosing AF, managing symptoms, and lessening complications from this dysrhythmia. OBJECTIVE: This review evaluates recent literature and addresses ED considerations in the management of AF. DISCUSSION: Emergency physicians should first assess patient clinical stability and evaluate and treat reversible causes...
January 30, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29395340/primary-outcomes-of-the-monitoring-in-dialysis-study-indicate-that-clinically-significant-arrhythmias-are-common-in-hemodialysis-patients-and-related-to-dialytic-cycle
#3
Prabir Roy-Chaudhury, Jim A Tumlin, Bruce A Koplan, Alexandru I Costea, Vijay Kher, Don Williamson, Saurabh Pokhariyal, David M Charytan
Sudden death is one of the more frequent causes of death for hemodialysis patients, but the underlying mechanisms, contribution of arrhythmia, and associations with serum chemistries or the dialysis procedure are incompletely understood. To study this, implantable loop recorders were utilized for continuous cardiac rhythm monitoring to detect clinically significant arrhythmias including sustained ventricular tachycardia, bradycardia, asystole, or symptomatic arrhythmias in hemodialysis patients over six months...
January 27, 2018: Kidney International
https://www.readbyqxmd.com/read/29361983/cardiac-computed-tomography-in-patients-with-symptomatic-new-onset-atrial-fibrillation-rule-out-acute-coronary-syndrome-but-with-intermediate-pretest-probability-for-coronary-artery-disease-admitted-to-a-chest-pain-unit
#4
Matthias Koopmann, Liane Hinrichs, Jan Olligs, Michael Lichtenberg, Lars Eckardt, Dirk Böse, Stefan Möhlenkamp, Johannes Waltenberger, Frank Breuckmann
BACKGROUND: Atrial fibrillation (AF) and coronary artery disease (CAD) may be encountered coincidently in a large portion of patients. However, data on coronary artery calcium burden in such patients are lacking. Thus, we sought to determine the value of cardiac computed tomography (CCT) in patients presenting with new-onset AF associated with an intermediate pretest probability for CAD admitted to a chest pain unit (CPU). METHODS: Calcium scores (CS) of 73 new-onset, symptomatic AF subjects without typical clinical, electrocardiographic, or laboratory signs of acute coronary syndrome (ACS) admitted to our CPU were analyzed...
January 24, 2018: European Journal of Medical Research
https://www.readbyqxmd.com/read/29336990/failure-of-intracardiac-pacing-after-fatal-propafenone-overdose-a-case-report
#5
Ivan Zeljković, Nikola Bulj, Matea Kolačević, Vedran Čabrilo, Diana Delić Brkljačić, Šime Manola
BACKGROUND: Propafenone is a sodium-channel blocker, class IC antiarrhythmic drug, frequently used to manage supraventricular dysrhythmias, especially atrial fibrillation. We report a self mono-intoxication with propafenone. CASE REPORT: A 68-year-old woman presented with a decreased level of consciousness, hypotension, and electrocardiogram showing QRS widening with atrial asystole and extreme bradycardia < 20 beats/min. After initial stabilization with transcutaneous pacing, laboratory findings detected normal electrolyte ranges and metabolic acidosis, and her medical history revealed availability of propafenone due to paroxysmal atrial fibrillation and depressive syndrome, which led to the suspicion of intoxication...
January 11, 2018: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29305104/heart-failure-with-mid-range-ejection-fraction-in-patients-admitted-to-internal-medicine-departments-findings-from-the-rica-registry
#6
María Esther Guisado-Espartero, Prado Salamanca-Bautista, Óscar Aramburu-Bodas, Alicia Conde-Martel, José Luis Arias-Jiménez, Pau Llàcer-Iborra, Melitón Francisco Dávila-Ramos, Yolanda Cabanes-Hernández, Luis Manzano, Manuel Montero-Pérez-Barquero
AIM: To improve the knowledge on characteristics, treatment and prognosis in patients with heart failure (HF) and mid-range ejection fraction discharged after an acute HF episode. METHODS: We prospectively included and followed 2753 patients admitted with HF to Internal Medicine units. Patients were classified according to ejection fraction (EF) into three strata: reduced, EF <40% (HFrEF); mid-range EF 40-49% (HFmrEF); and preserved EF ≥50% (HFpEF). Clinical, echocardiographic, laboratory data and treatment at discharge were recorded and the groups were compared...
January 2, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29243206/ical-and-ito-mediate-rate-dependent-repolarization-in-rabbit-atrial-myocytes
#7
Jian-Wen Hou, Wei Li, Yu-Dong Fei, Yi-He Chen, Qian Wang, Yue-Peng Wang, Yi-Gang Li
Rate-dependent repolarization (RDR) of action potential (AP) in cardiomyocyte plays a critical role in the genesis of arrhythmias and RDR in atrium has been linked with atrial fibrillation. However, detailed studies focusing on the role of RDR in rabbit atrium are scant. In this study, atrial cells were isolated from rabbit heart and rate-dependent property was explored in single atrial cell to elucidate the underlying mechanism. Our results indicated that rate-dependent prolongation was evident at the action potential duration at 20% (APD20) and 50% (APD50) repolarization but not at 90% repolarization (APD90) under control condition...
December 14, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29229678/epitope-mapping-of-serca2a-identifies-an-antigenic-determinant-that-induces-mainly-atrial-myocarditis-in-a-j-mice
#8
Bharathi Krishnan, Chandirasegaran Massilamany, Rakesh H Basavalingappa, Arunakumar Gangaplara, Rajkumar A Rajasekaran, Muhammad Z Afzal, Vahid Khalilzad-Sharghi, You Zhou, Jean-Jack Riethoven, Shyam S Nandi, Paras K Mishra, Raymond A Sobel, Jennifer L Strande, David Steffen, Jay Reddy
Sarcoplasmic/endoplasmic reticulum Ca2+ adenosine triphosphatase (SERCA)2a, a critical regulator of calcium homeostasis, is known to be decreased in heart failure. Patients with myocarditis or dilated cardiomyopathy develop autoantibodies to SERCA2a suggesting that they may have pathogenetic significance. In this report, we describe epitope mapping analysis of SERCA2a in A/J mice that leads us to make five observations: 1) SERCA2a contains multiple T cell epitopes that induce varying degrees of myocarditis...
December 11, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29171211/a-prospective-survey-of-atrial-fibrillation-management-for-real-world-guideline-adherence-comparison-study-of-drugs-for-symptom-control-and-complication-prevention-of-atrial-fibrillation-code-af-registry
#9
Hyeongsoo Kim, Tae Hoon Kim, Myung Jin Cha, Jung Myung Lee, Junbeom Park, Jin Kyu Park, Ki Woon Kang, Jaemin Shim, Jae Sun Uhm, Jun Kim, Hyung Wook Park, Eue Keun Choi, Jin Bae Kim, Changsoo Kim, Young Soo Lee, Boyoung Joung
BACKGROUND AND OBJECTIVES: The aging population is rapidly increasing, and atrial fibrillation (AF) is becoming a significant public health burden in Asia, including Korea. This study evaluated current treatment patterns and guideline adherence of AF treatment. METHODS: In a prospective observational registry (COmparison study of Drugs for symptom control and complication prEvention of Atrial Fibrillation [CODE-AF] registry), 6,275 patients with nonvalvular AF were consecutively enrolled between June 2016 and April 2017 from 10 tertiary hospitals in Korea...
October 17, 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/29169235/hypermagnesuria-in-humans-following-acute-intravenous-administration-of-digoxin
#10
Nabil Abu-Amer, Eldar Priel, Steven J.D. Karlish, Zvi Farfel, Haim Mayan
Background: Hypomagnesemia is a known predisposing condition for the appearance of digitalis toxicity. The detection of a genetic form of Mg urinary wasting with hypomagnesemia being caused by a mutation in the γ subunit (FXYD2) of the Na,K-ATPase, the pharmacological target of Digoxin, prompted us to investigate whether Digoxin administration increases urinary Mg excretion. Methods: Two groups of subjects, with rapid atrial fibrillation, received intravenous Digoxin (n = 9) or verapamil (n = 8), for heart rate control...
October 30, 2017: Nephron
https://www.readbyqxmd.com/read/29153576/coronary-artery-calcium-and-long-term%C3%A2-risk-of-death-myocardial%C3%A2-infarction-and-stroke-the-walter-reed-cohort-study
#11
Joshua D Mitchell, Robert Paisley, Patrick Moon, Eric Novak, Todd C Villines
OBJECTIVES: This study aimed to assess the long-term risk of death and atherosclerotic cardiovascular disease (ASCVD) outcomes, including stroke, in a real-world cohort that underwent coronary artery calcium (CAC) scoring. BACKGROUND: Large-scale, long-term studies assessing the independent relationship of CAC for prediction of ASCVD events, to include stroke, in young, low-risk patients are uncommon outside of the clinical trial setting. METHODS: A total of 23,637 consecutive subjects without ASCVD who underwent CAC scoring from 1997 to 2009 were studied...
November 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29142156/outcomes-of-rate-control-treatment-in-patients-with-atrial-fibrillation-and-heart-failure%C3%A3-a-nationwide-cohort-study
#12
Hee Tae Yu, Pil-Sung Yang, Hancheol Lee, Seng Chan You, Tae-Hoon Kim, Jae-Sun Uhm, Jong-Youn Kim, Hui-Nam Pak, Moon-Hyoung Lee, Boyoung Joung
BACKGROUND: Rate control is now a front-line therapy in the management of atrial fibrillation (AF). However, the survival benefits of different rate-control medications remain controversial, so we assessed the efficacy of rate-control medications in AF patients with concomitant heart failure (HF).Methods and Results:From January 2002 to December 2008, a total of 7,034 AF patients with a single type of rate-control drug or without rate-control treatment were enrolled from the Korea National Health Insurance Service database...
November 14, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29130489/angiotensin-1-7-modulates-electrophysiological-characteristics-and-calcium-homeostasis-in-pulmonary-veins-cardiomyocytes-via-mas-pi3k-enos-signaling-pathway
#13
Yen-Yu Lu, Wen-Shiann Wu, Yung-Kuo Lin, Chen-Chuan Cheng, Yao-Chang Chen, Shih-Ann Chen, Yi-Jen Chen
BACKGROUND: Atrial fibrillation (AF) is the most common sustained arrhythmia, and pulmonary veins (PVs) play a critical role in triggering AF. Angiotensin (Ang)-(1-7) regulates calcium (Ca(2+) ) homeostasis and also plays a critical role in cardiovascular pathophysiology. However, the role of Ang-(1-7) in PV arrhythmogenesis remains unclear. MATERIALS AND METHODS: Conventional microelectrodes, whole-cell patch-clamp, and the Fluo-3 fluorimetric ratio technique were used to record ionic currents and intracellular Ca(2+) in isolated rabbit PV preparations, and in single isolated PV cardiomyocytes, before and after administration of Ang-(1-7)...
November 12, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29129562/preoperative-use-of-oral-beta-adrenergic-blocking-agents-and-the-incidence-of-new-onset-atrial-fibrillation-after-cardiac-surgery-a-systematic-review-and-meta-analysis
#14
REVIEW
Paul Min Thein, Kyle White, Khyati Banker, Carole Lunny, Sam Mirzaee, Arthur Nasis
BACKGROUND: Current epidemiological data suggests that postoperative atrial fibrillation or atrial flutter (POAF) causes significant morbidity and mortality after cardiac surgery. The literature for prophylactic management of POAF is limited, resulting in the lack of clear guidelines on management recommendations. AIM: To examine the efficacy of prophylactic rate control agents in reducing the incidence of new-onset POAF in patients undergoing elective cardiac surgery...
October 19, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29120136/postoperative-atrial-fibrillation-prophylaxis-and-lung-resection-%C3%A2-our-experience-with-608-consecutive-patients
#15
Vjekoslav Karadža, Dinko Stančić-Rokotov, Jasna Špiček Macan, Nevenka Hodoba, Nevenka Kolarić, Sanja Sakan
Postoperative atrial fibrillation is a common complication after lung resection. It is burdened by increased mortality and morbidity, prolonged hospitalization, and higher resource utilization in thoracic surgery patients. Therefore, some kind of pharmacological prophylaxis is recommended. In our patients, diltiazem, a calcium antagonist, is administered. We collected data on all 608 patients having undergone lung resection (no less than lobectomy) between November 2012 and May 2015. This period included patients having received diltiazem during their postoperative stay in our Intensive Care Unit and surgical ward, and those that did not receive it...
March 2017: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29106835/impact-of-mitral-annular-calcium-on-outcomes-after-transcatheter-aortic-valve-implantation
#16
Marco B Ancona, Francesco Giannini, Antonio Mangieri, Damiano Regazzoli, Richard J Jabbour, Akihito Tanaka, Luca Testa, Vittorio Romano, Matteo Longoni, Manuela Giglio, Francesca Besana, Michele Cacucci, Eustachio Agricola, Alaide Chieffo, Ottavio Alfieri, Matteo Montorfano, Antonio Colombo, Azeem Latib
A high prevalence of mitral annular calcium (MAC) is expected in patients undergoing transcatheter aortic valve implantation (TAVI); however, data regarding the prevalence of MAC and impact on risk of cardiovascular events are lacking. To determine the prevalence of MAC and its association with clinical outcomes in patients undergoing TAVI, we retrospectively analyzed 424 patients who underwent transfemoral TAVI from 2007 to 2015 and whose preoperative computed tomography images were available for assessment of MAC...
September 18, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29084143/red-wine-resveratrol-and-atrial-fibrillation
#17
REVIEW
Laura Siga Stephan, Eduardo Dytz Almeida, Melissa Medeiros Markoski, Juliano Garavaglia, Aline Marcadenti
Atrial fibrillation (AF) is a common cardiac arrhythmia that is associated with increased risk for cardiovascular disease and overall mortality. Excessive alcohol intake is a well-known risk factor for AF, but this correlation is less clear with light and moderate drinking. Besides, low doses of red wine may acutely prolong repolarization and slow cardiac conduction. Resveratrol, a bioactive polyphenol found in grapes and red wine, has been linked to antiarrhythmic properties and may act as an inhibitor of both intracellular calcium release and pathological signaling cascades in AF, eliminating calcium overload and preserving the cardiomyocyte contractile function...
October 30, 2017: Nutrients
https://www.readbyqxmd.com/read/29064176/calciphylaxis-after-parathyroidectomy
#18
Sathish Karmegam, Anupkumar Shetty
A 60-year-old African American man with end stage renal disease on hemodialysis (HD) for the past 2.5 years developed severe hyperparathyroidism. Other past medical history included atrial fibrillation, type II diabetes mellitus, hypertension, gout, pericardial effusion needing pericardial window, deep vein thrombosis, mitral insufficiency, and cardiomyopathy with implantable cardioversion device placement. His parathyroid hormone (PTH) level peaked at 4,191 pg/mL despite being on cinacalcet, sevelamer, and paricalcitol...
October 2017: Hemodialysis International
https://www.readbyqxmd.com/read/29045723/acute-administration-of-tumour-necrosis-factor-%C3%AE-induces-spontaneous-calcium-release-via-the-reactive-oxygen-species-pathway-in-atrial-myocytes
#19
Song Zuo, Lin-Ling Li, Yan-Fei Ruan, Le Jiang, Xin Li, Song-Nan Li, Song-Nan Wen, Rong Bai, Nian Liu, Xin Du, Jian-Zeng Dong, Chang-Sheng Ma
Aims: The arrhythmogenic mechanisms of atrial fibrillation (AF) that are induced by acute inflammation, such as postoperative AF, are not well understood. We investigated the acute effects of tumour necrosis factor-α (TNF-α) that mimic acute inflammation on Ca2+ handling in isolated atrial myocytes and its underlying mechanisms. Methods and results: Cytosol Ca2+ handling and mitochondrial reactive oxygen species (ROS) production were studied in freshly isolated atrial myocytes of wild-type mice that were exposed to TNF-α (0...
October 17, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29036457/feasibility-evaluation-of-long-term-use-of-beta-blockers-and-calcium-antagonists-in-patients-with-brugada-syndrome
#20
Tsukasa Kamakura, Mitsuru Wada, Kohei Ishibashi, Yuko Y Inoue, Koji Miyamoto, Hideo Okamura, Satoshi Nagase, Takashi Noda, Takeshi Aiba, Satoshi Yasuda, Wataru Shimizu, Shiro Kamakura, Kengo Kusano
Aims: Beta-blockers (BBs) and calcium antagonists (CAs) are reported to aggravate ST-segment elevation in some patients with Brugada syndrome (BrS). The feasibility of their long-term use in BrS still remains unknown. We investigated the safety of long-term use of BB and CA in BrS patients. Methods and results: Of the 360 consecutive BrS patients, 29 [5: a history of ventricular fibrillation (VF), 17: syncope, 7: asymptomatic] took BB and/or CA (BB: 22, CA: 8) for more than 1 year for the treatment of co-morbidities such as atrial tachyarrhythmia, vasospastic angina, and neurally mediated syncope...
September 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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