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https://www.readbyqxmd.com/read/28252842/effects-of-transendocardial-stem-cell-injection-on-ventricular-proarrhythmia-in-patients-with-ischemic-cardiomyopathy-results-from-the-poseidon-and-tac-hft-trials
#1
Archana Ramireddy, Chad R Brodt, Adam M Mendizabal, Darcy L DiFede, Chris Healy, Vishal Goyal, Yahya Alansari, James O Coffey, Juan F Viles-Gonzalez, Alan W Heldman, Jeffrey J Goldberger, Robert J Myerburg, Joshua M Hare, Raul D Mitrani
Transendocardial stem cell injection in patients with ischemic cardiomyopathy (ICM) improves left ventricular function and structure but has ill-defined effects on ventricular arrhythmias. We hypothesized that mesenchymal stem cell (MSC) implantation is not proarrhythmic. Post hoc analyses were performed on ambulatory ECGs collected from the POSEIDON and TAC-HFT trials. Eighty-eight subjects (mean age 61 ± 10 years) with ICM (mean EF 32.2% ± 9.8%) received treatment with MSC (n = 48), Placebo (n = 21), or bone marrow mononuclear cells (BMC) (n = 19)...
March 2, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28223296/cardiac-effects-of-sulfonylurea-related-hypoglycemia
#2
Timothy L Middleton, Jencia Wong, Lynda Molyneaux, Belinda A Brooks, Dennis K Yue, Stephen M Twigg, Ted Wu
OBJECTIVE: To determine the effect of sulfonylurea-related hypoglycemia on cardiac repolarization and ectopy in the setting of well-controlled type 2 diabetes. RESEARCH DESIGN AND METHODS: Thirty subjects with sulfonylurea-treated type 2 diabetes underwent 48 h of concurrent continuous glucose monitoring and ambulatory electrocardiography. Ventricular repolarization (QTc) and QT dynamicity were analyzed during periods of hypoglycemia (<3.5 mmol/L for >20 min) and compared with periods of euglycemia and hyperglycemia combined...
February 21, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28215569/cardiac-phenotype-and-long-term-prognosis-of-arrhythmogenic-right-ventricular-cardiomyopathy-dysplasia-patients-with-late-presentation
#3
Aditya Bhonsale, Anneline S J M Te Riele, Abhishek C Sawant, Judith A Groeneweg, Cynthia A James, Brittney Murray, Crystal Tichnell, Thomas P Mast, Michelle J van der Pols, Maarten J M Cramer, Dennis Dooijes, Jeroen F van der Heijden, Harikrishna Tandri, J Peter van Tintelen, Daniel P Judge, Richard N W Hauer, Hugh Calkins
BACKGROUND: The clinical profile of arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) patients with late presentation is unknown. OBJECTIVE: The purpose of this study was to characterize the genotype, cardiac phenotype, and long-term outcomes of ARVC/D patients with late presentation (age ≥50 years at diagnosis). METHODS: Five hundred two patients with an ARVC/D diagnosis from Johns Hopkins and Utrecht Registries were studied and long-term clinical outcomes ascertained...
February 12, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28213055/electrophysiological-measurements-that-can-explain-and-guide-temporary-accelerated-pacing-to-avert-re-occurrence-of-torsade-de-pointes-arrhythmias-in-the-canine-chronic-atrioventricular-block-model
#4
Sofieke C Wijers, Alexandre Bossu, Albert Dunnink, Jet D M Beekman, Rosanne Varkevisser, Alfonso Aranda Hernández, Mathias Meine, Marc A Vos
BACKGROUND: Pacing at higher rates is known to suppress torsade de pointes (TdP) arrhythmias. Nevertheless, exact application and mechanism need further clarification. In the anesthetized canine chronic atrioventricular block model, ventricular remodeling is responsible for a high and reproducible incidence of TdP upon a challenge with dofetilide. OBJECTIVE: We used this model to investigate by what mechanism accelerated pacing averts TdP and what repolarization parameter could be used to guide temporary accelerated pacing (TAP)...
February 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28170028/long-term-prognostic-significance-of-right-bundle-branch-morphology-ventricular-ectopy-induced-during-stress-test-in-patients-with-intermediate-to-high-probability-of-coronary-artery-disease
#5
Loïc Bière, Tin-Hinan Mezdad, Jean-Marc Dupuis, Laurent Vervueren, Hervé Rakotonirina, Fabrice Prunier, Alain Furber
No abstract text is available yet for this article.
February 7, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28159815/validation-of-the-prognostic-utility-of-the-electrocardiogram-for-acute-drug-overdose
#6
Alex F Manini, Ajith P Nair, Rajesh Vedanthan, David Vlahov, Robert S Hoffman
BACKGROUND: While it is certain that some emergency department patients with acute drug overdose suffer adverse cardiovascular events (ACVE), predicting ACVE is difficult. The prognostic utility of the ECG for heterogeneous drug overdose patients remains to be proven. This study was undertaken to validate previously derived features of the initial ECG associated with ACVE in this population. METHODS AND RESULTS: We performed a prospective validation cohort study to evaluate adult emergency department patients with acute drug overdose at 2 urban university hospitals over 5 years in whom an emergency department admission ECG was performed...
February 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28137981/sudden-cardiac-death-the-pro-arrhythmic-interaction-of-an-acute-loading-with-an-underlying-substrate
#7
George R Sutherland
Sudden cardiac death (SCD) is a complex phenomenon, occurring either in apparently normal individuals or in those where there is a recognized underlying cardiac abnormality. In both groups, the lethal arrhythmia has frequently been related to the physiologic trigger of either exercise or stress. Prior research into SCD has focused mainly on a combination of identifying either vulnerable myocardial substrates; pharmacological approaches to altering electrical activation/repolarisation in substrates; or the suppression of induced lethal arrhythmias with implantable defibrillators...
January 29, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28045723/rate-dependent-left-bundle-branch-block-in-an-ambulatory-surgery-patient-a-case-report
#8
Ashraf Farag, Justin Tsai, Sam Deeb, Deidre Putman-Garcia, John D Wasnick, Lydia A Conlay
A 52-year-old woman, ASA II (American Society of Anesthesia classification II) scheduled for cholecystectomy in an ambulatory center, exhibited a wide-complex tachycardia with ectopy on the monitor after induction with propofol and succinylcholine. Blood pressure remained stable; amiodarone was administered for presumed ventricular tachycardia. A 12-lead electrocardiogram (ECG) showed a new left bundle branch block (LBBB) at 98 beats per minute (bpm), which resolved when the heart rate slowed. Surgery was postponed, and both the LBBB and ectopy recurred frequently during the next 24 hours in the intensive care unit, particularly at heart rates >90 bpm...
February 15, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28001123/fine-scale-spatial-and-temporal-variation-in-temperature-and-arrhythmia-episodes-in-the-va-normative-aging-study
#9
Antonella Zanobetti, Brent A Coull, Itai Kloog, David Sparrow, Pantel S Vokonas, Diane R Gold, Joel Schwartz
Many studies have demonstrated that cold and hot temperatures are associated with increased deaths and hospitalization rates; new findings indicate also an association with more specific cardiac risk factors. Most of these existing studies have relied on few weather stations to characterize exposures; few have used residence-specific estimates of temperature, or examined the exposure-response function. We investigated the association of arrhythmia episodes with spatial and temporal variation in temperature...
January 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/27980762/catheter-ablation-of-ventricular-ectopy-with-para-hisian-origin-importance-of-mapping-both-sides-of-the-interventricular-septum-and-understanding-when-to-stop-ablating
#10
Antonio Madaffari, Anett Große, Santi Raffa, Markus Frommhold, Agnes Fink, J Christoph Geller
Catheter ablation of para-Hisian premature ventricular contractions (PVCs) still represents a challenge and is a compromise between success and inadvertent AV block. We describe a possible strategy to address PVCs from this location with high-amplitude His-bundle potentials at the site of earliest activation.
December 2016: Clinical Case Reports
https://www.readbyqxmd.com/read/27875987/biomarkers-of-cardiovascular-injury-and-stress-are-associated-with-increased-frequency-of-ventricular-ectopy-a-population-based-study
#11
Julia Brox Skranes, Gunnar Einvik, Silje Kjeka Namtvedt, Anna Randby, Harald Hrubos-Strøm, Jon Brynildsen, Tor-Arne Hagve, Virend K Somers, Helge Røsjø, Torbjørn Omland
BACKGROUND: Asymptomatic ventricular arrhythmias are common and associated with increased risk of cardiovascular mortality. Cardiac troponins, natriuretic peptides and C-reactive protein (CRP) are also predictive of adverse cardiovascular events in the general population, but limited information is available on the relationship between these biomarkers and ventricular ectopy in a community-based population. The objectives were to evaluate the associations between ventricular ectopic activity and N-terminal pro-B-type natriuretic peptide (NT-proBNP), high sensitivity-troponin I (hs-TnI) and hs-CRP in a community-based setting...
November 22, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27867290/ranolazine-is-an-effective-and-safe-treatment-of-adults-with-symptomatic-premature-ventricular-contractions-due-to-triggered-ectopy
#12
Gary L Murray
Early and delayed afterdepolarizations (EAD/DAD) cause triggered ventricular ectopy. Because ranolazine (RAN) suppresses EAD/DAD, we postulated that RAN might be effective in reducing premature ventricular contractions (PVCs). To assess the effect of RAN in patients with symptomatic PVCs due to triggered ectopy and its safety and tolerability. A total of 59 patients with symptomatic PVCs were identified from full-disclosure Holters. Doses of 500 and 1,000 mg offlabel RAN, daily, were given to 34 and 66% patients, respectively, and repeat Holters were performed prospectively during mean followup of 3...
December 2016: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/27867071/evaluation-of-a-novel-high-resolution-mapping-system-for-catheter-ablation-of-ventricular-arrhythmias
#13
Karthik Viswanathan, Lilian Mantziari, Charles Butcher, Emily Hodkinson, Eric Lim, Habib Khan, Sandeep Panikker, Shouvik Haldar, Julian W E Jarman, David G Jones, Wajid Hussain, John P Foran, Vias Markides, Tom Wong
BACKGROUND: The mapping of ventricular arrhythmias in humans using a minibasket 64-electrode catheter paired with a novel automatic mapping system (Rhythmia) has not been evaluated. OBJECTIVE: The purpose of this study was to evaluate the safety and efficacy of mapping ventricular arrhythmias and clinical outcomes after ablation using this system. METHODS: Electroanatomic maps for ventricular arrhythmias were obtained during 20 consecutive procedures in 19 patients (12 with ventricular tachycardia [VT] and 2 with ventricular ectopy [VE])...
November 17, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27815173/stable-gastric-pentadecapeptide-bpc-157-and-bupivacaine
#14
Gordana Zivanovic-Posilovic, Diana Balenovic, Ivan Barisic, Dean Strinic, Vasilije Stambolija, Mario Udovicic, Sandra Uzun, Domagoj Drmic, Josipa Vlainic, Martina Lovric Bencic, Aleksandra Sindic, Sven Seiwerth, Predrag Sikiric
Bupivacaine toxicity following accidental overdose still lacks therapeutic solution. However, there are major arguments for testing BPC 157 against bupivacaine toxicity in vivo in rats, in particular, and then finally, in vitro. These are: the lack of any known BPC 157 toxicity, a lifesaving effect via the mitigation of arrhythmias in rats underwent hyperkalemia or digitalis toxicity, the elimination of hyperkalemia and arrhythmias in rats underwent succinylcholine toxicity and finally, the reduction of potassium-induced depolarization in vitro (in HEK293 cells) in severe hyperkalemia...
December 15, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27802959/ventricular-ectopy-in-hospitalized-elderly-adults
#15
Mary G Carey, Teri M Kozik, Michele M Pelter, Salah S Al-Zaiti
No abstract text is available yet for this article.
November 2016: American Journal of Critical Care: An Official Publication, American Association of Critical-Care Nurses
https://www.readbyqxmd.com/read/27778458/t-wave-alternans-heart-rate-turbulence-and-ventricular-ectopy-in-standard-versus-daily-hemodialysis-results-from-the-fhn-daily-trial
#16
RANDOMIZED CONTROLLED TRIAL
Rachel M Kaplan, Charles A Herzog, Brett Larive, Haris Subacius, Bruce D Nearing, Richard Verrier, Rod S Passman
BACKGROUND: Hemodialysis (HD) patients are at high risk of sudden cardiac death (SCD). HD 6-times/week (6x/wk) may reduce SCD risk compared to usual 3-times/week HD (3x/wk) by mechanisms unknown. T-wave alternans (TWA), heart rate turbulence (HRT), and ventricular ectopy (VE) are elevated in HD patients, but their response to 6x/wk HD has not been assessed. METHODS: Baseline and 1-year Holter recordings were analyzed from enrollees in the Frequent Hemodialysis Network Daily Trial, a randomized trial comparing 3x/wk to 6x/wk in 245 chronic HD patients...
November 2016: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/27772664/follow-up-of-electrocardiographic-findings-and-arrhythmias-in-patients-with-anomalously-arising-left-coronary-artery-from-the-pulmonary-trunk
#17
Judson A Moore, Antonio G Cabrera, Jeffrey J Kim, Santiago O Valdés, Caridad de la Uz, Christina Y Miyake
Follow-up data and correlation of arrhythmias, electrocardiogram (ECG) changes, and cardiac function in anomalous left coronary artery from the pulmonary trunk or artery have not been previously studied. This is a retrospective single-center review of 44 anomalous left coronary artery from the pulmonary trunk or artery patients diagnosed between 1992 and 2014, at a median age of 3 months (3 days to 13 years). Clinical history, ECG, Holter, and echocardiogram data were reviewed. ECGs were reviewed for contiguous Q-or T-wave inversions, hypertrophy, bundle branch block, and axis deviation...
September 23, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27728077/ventricular-ectopy-in-structurally-normal-heart-response-to-beta-blocker-case-report-of-three-cases
#18
C Guruchaithanya Kumar
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27579717/self-gated-mri-of-multiple-beat-morphologies-in-the-presence-of-arrhythmias
#19
Francisco Contijoch, Srikant Kamesh Iyer, James J Pilla, Paul Yushkevich, Joseph H Gorman, Robert C Gorman, Harold Litt, Yuchi Han, Walter R T Witschey
PURPOSE: Develop self-gated MRI for distinct heartbeat morphologies in subjects with arrhythmias. METHODS: Golden angle radial data was obtained in seven sinus and eight arrhythmias subjects. An image-based cardiac navigator was derived from single-shot images, distinct beat types were identified, and images were reconstructed for repeated morphologies. Image sharpness, contrast, and volume variation were quantified and compared with self-gated MRI. Images were scored for image quality and artifacts...
August 31, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27521094/ventricular-arrhythmias-in-apparently-normal-hearts-who-needs-an-implantable-cardiac-defibrillator
#20
REVIEW
Alex Y Tan, Kenneth Ellenbogen
Idiopathic ventricular tachycardia is often considered a benign form of ventricular arrhythmia in patients without apparent structural heart disease. However, a subset of patients may develop malignant ventricular arrhythmias and present with syncope and sudden cardiac arrest. Survivors of cardiac arrest are candidates for implantable cardiac defibrillators (ICDs). The indications for ICDs in patients with less than a full-blown cardiac arrest presentation but with electrocardiographically high-risk ectopy features remain uncertain...
September 2016: Cardiac Electrophysiology Clinics
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