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Ventricular inversion

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https://www.readbyqxmd.com/read/29779525/geometrical-constraint-of-sources-in-noninvasive-localization-of-premature-ventricular-contractions
#1
Jana Svehlikova, Michal Teplan, Milan Tysler
The inverse problem of electrocardiography for localization of a premature ventricular contraction (PVC) origin was solved and compared for three types of the equivalent cardiac electrical generator: transmembrane voltages, epicardial potentials, and dipoles. Instead of regularization methods usually used for the ill-posed inverse problems an assumption of a single point source representative of the heart generator was applied to the solution as a geometrical constraint. Body surface potential maps were simulated from eight modeled origins of the PVC in the heart model...
May 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29764897/diagnostic-yield-of-genetic-testing-in-young-athletes-with-t-wave-inversion
#2
Nabeel Sheikh, Michael Papadakis, Mathew Wilson, Aneil Malhotra, Carmen Adamuz, Tessa Homfray, Lorenzo Monserrat, Elijah R Behr, Sanjay Sharma
Background -T-wave inversion (TWI) is common in patients with cardiomyopathy. However, up to 25% of athletes of African/Afro-Caribbean descent (black athletes) and 5% of white athletes also have TWI of unclear clinical significance despite comprehensive clinical evaluation and long-term follow-up. The aim of this study was to determine the diagnostic yield from genetic testing, beyond clinical evaluation, when investigating athletes with TWI. Methods -We investigated 50 consecutive asymptomatic black and 50 white athletes aged 14-35-years-old with TWI and a normal echocardiogram who were referred to a UK tertiary center for cardiomyopathy and sports cardiology...
May 15, 2018: Circulation
https://www.readbyqxmd.com/read/29761112/takotsubo-cardiomyopathy-mimicking-stent-thrombosis-after-percutaneous-coronary-intervention
#3
Furqan Khattak, Muhammad Khalid, Ghulam Murtaza, Timir K Paul
Takotsubo cardiomyopathy, also known as "broken heart syndrome," is a transient left ventricular dysfunction associated with stress (usually emotional) induced myocardial injury and stunning. It often presents as myocardial infarction on surface electrocardiogram (EKG). Diagnosis is made by coronary angiography, which rules out coronary artery disease and shows pathognomonic apical ballooning. In this article, we present a case of a 72-year-old woman who initially presented with an ST segment elevation myocardial infarction on EKG...
January 2018: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/29758993/lower-in-hospital-ventricular-tachyarrhythmia-in-patients-with-acute-myocardial-infarction-receiving-prior-statin-therapy
#4
Jin Sup Park, Bo Won Kim, Taek Jong Hong, Jeong Cheon Choe, Hye Won Lee, Jun-Hyok Oh, Jung Hyun Choi, Han Cheol Lee, Kwang Soo Cha, Myung Ho Jeong
We evaluated whether prior statin therapy reduces in-hospital ventricular tachycardia/ventricular fibrillation (VT/VF) in percutaneous coronary intervention (PCI) patients with acute myocardial infarction (MI). Among the 1177 patients from the Acute Myocardial Infarction Registry-National Institutes of Health (KAMIR-NIH), 823 (70%) patients received prior statin therapy. Prior statin therapy was associated with a reduced risk of VT/VF events in both adjusted propensity score analysis (odds ratio [OR] 0.414, 95% confidence interval [CI], 0...
January 1, 2018: Angiology
https://www.readbyqxmd.com/read/29754182/assessment-of-aortic-stiffness-in-patients-with-ankylosing-spondylitis-using-cardiovascular-magnetic-resonance
#5
P Stefan Biesbroek, Sjoerd C Heslinga, Peter M van de Ven, Mike J L Peters, Raquel P Amier, Thelma C Konings, Christopher D Maroules, Colby Ayers, Parag H Joshi, Irene E van der Horst-Bruinsma, Vokko P van Halm, Albert C van Rossum, Michael T Nurmohamed, Robin Nijveldt
To evaluate aortic stiffness in patients with ankylosing spondylitis (AS) using cardiovascular magnetic resonance (CMR) and to assess its association with AS characteristics and left ventricular (LV) remodeling. In this prospective study, 14 consecutive AS patients were each matched to two controls without cardiovascular symptoms or known cardiovascular disease who underwent CMR imaging for the assessment of aortic arch pulse wave velocity (PWV) at 1.5 Tesla. To enhance comparability of the samples, matching was done with replacement resulting in 20 unique controls...
May 12, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29733344/impact-of-blunted-nocturnal-blood-pressure-dipping-on-cardiac-systolic-function-in-community-participants-not-receiving-anti-hypertensive-therapy
#6
Angela J Woodiwiss, Carlos D Libhaber, Pinhas Sareli, Gavin R Norton
Background: Blunted nocturnal blood pressure (BP) dipping (non-dipping) predicts cardiovascular morbidity and mortality, and is associated with heart failure (HF) independent of office BP. Whether non-dipping is independently associated with cardiac systolic function prior to the development of HF is uncertain. Methods: We assessed whether nocturnal BP dipping pattern and nocturnal BP were associated with indexes of cardiac systolic function [endocardial fractional shortening (endFS), midwallFS (mFS), ejection fraction (EF)] independent of left ventricular mass index (LVMI) and relative wall thickness (RWT) in 491 randomly selected community participants not receiving anti-hypertensive therapy...
May 4, 2018: American Journal of Hypertension
https://www.readbyqxmd.com/read/29723683/beyond-the-length-and-look-of-repolarization-defining-the-non-qtc-electrocardiographic-profiles-of-patients-with-congenital-long-qt-syndrome
#7
Conor M Lane, J Martijn Bos, Ram K Rohatgi, Michael J Ackerman
BACKGROUND: Little is known about the spectrum and prevalence of ECG features beyond the length and morphology of repolarization in patients with congenital long QT syndrome (LQTS). OBJECTIVE: To characterize the full ECG phenotype of LQTS patients and evaluate differences by age and LQTS genotype. METHODS: Retrospective review of 943 patients with LQTS (57% female, median age 25 years; IQR 9 - 34 years) was performed. Comprehensive analysis of their initial evaluation ECG was performed using definitions outlined in Heart Rhythm Society guidelines...
April 30, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29714450/obstructive-sleep-apnea-syndrome-is-associated-with-impaired-pulmonary-artery-distensibility-and-right-ventricular-systolic-dysfunction
#8
Süha Çetin, Mustafa Gökhan Vural, Hikmet Fırat, Ramazan Akdemir
Background/aim: We investigated whether obstructive sleep apnea syndrome (OSAS) has any impact on pulmonary artery distensibility (PAD) and right ventricular (RV) function. Materials and methods: Subjects were categorized according to apnea–hypopnea index (AHI) as follows: controls (n = 17 and AHI < 5), mild-to-moderate OSAS (n = 22 and AHI = 5–30), and severe OSAS (n = 29 and AHI > 30). All subjects underwent transthoracic echocardiography after polysomnography to assess PAD and RV function. PAD was recorded as M-Mode trace of the right pulmonary artery and was defined as (PAmax –PAmin/PAmin) × 100...
April 30, 2018: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29709534/measurement-of-microvascular-function-in-patients-presenting-with-thrombolysis-for-st-elevation-myocardial-infarction-and-pci-for-non-st-elevation-myocardial-infarction
#9
Sonny Palmer, Jamie Layland, Heath Adams, Srikkumar Ashokkumar, Paul D Williams, Christopher Judkins, Andre La Gerche, Andrew T Burns, Robert J Whitbourn, Andrew I MacIsaac, Andrew M Wilson
BACKGROUND: In this prospective study, we compared the invasive measures of microvascular function in two subsets: patients with pharmacoinvasive thrombolysis for STEMI, and patients undergoing percutaneous coronary intervention (PCI) for NSTEMI. METHODS: The study consisted of 17 patients with STEMI referred for cardiac catheterisation post thrombolysis, and 20 patients with NSTEMI. Coronary physiological indexes were measured in each patient before and after PCI...
April 12, 2018: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29709099/biomarker-based-phenotyping-of-myocardial-fibrosis-identifies-patients-with-heart-failure-with-preserved-ejection-fraction-resistant-to-the-beneficial-effects-of-spironolactone-results-from-the-aldo-dhf-trial
#10
Susana Ravassa, Tobias Trippel, Doris Bach, Diana Bachran, Arantxa González, Begoña López, Rolf Wachter, Gerd Hasenfuss, Christian Delles, Anna F Dominiczak, Burkert Pieske, Javier Díez, Frank Edelmann
BACKGROUND: Myocardial fibrosis is characterized by excessive cross-linking and deposition of collagen type I and is involved in left ventricular stiffening and left ventricular diastolic dysfunction (LVDD). We investigated whether the effect of spironolactone on LVDD in patients with heart failure with preserved ejection fraction (HFpEF) depends on its effects on collagen cross-linking and/or deposition. METHODS AND RESULTS: We investigated 381 HFpEF patients from the multicentre, randomized, placebo-controlled Aldo-DHF trial with measures of the E:e' ratio...
April 30, 2018: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29706429/heart-failure-subtypes-and-thromboembolic-risk-in-patients-with-atrial-fibrillation-the-prefer-in-af-hf-substudy
#11
Jolanta M Siller-Matula, Ladislav Pecen, Giuseppe Patti, Markus Lucerna, Paulus Kirchhof, Maciej Lesiak, Kurt Huber, Freek W A Verheugt, Irene M Lang, Giulia Renda, Renate B Schnabel, Rolf Wachter, Dipak Kotecha, Jean-Marc Sellal, Miklos Rohla, Fabrizio Ricci, Raffaele De Caterina
BACKGROUND AND OBJECTIVES: To assess thromboembolic and bleeding risks in patients with heart failure (HF) and atrial fibrillation (AF) according to HF type. METHODS: We analyzed 6170 AF patients from the Prevention of thromboembolic events - European Registry in Atrial Fibrillation (PREFER in AF), and categorized patients into: HF with reduced left-ventricular ejection fraction (HFrEF; LVEF < 40%); mid-range EF (HFmrEF; LVEF: 40-49%); lower preserved EF (HFLpEF; LVEF: 50-60%), higher preserved EF (HFHpEF; LVEF > 60%), and no HF...
April 22, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29702740/localization-of-ventricular-activation-origin-using-patient-specific-geometry-preliminary-results
#12
Shijie Zhou, John L Sapp, Amir AbdelWahab, Petr Šťovíček, B Milan Horáček
BACKGROUND AND OBJECTIVES: Catheter ablation of ventricular tachycardia (VT) may include induction of VT and localization of VT-exit site. Our aim was to assess localization performance of a novel statistical pace-mapping method and compare it with performance of an electrocardiographic inverse solution. METHODS: Seven patients undergoing ablation of VT (4 with epicardial, 3 with endocardial exit) aided by electroanatomic mapping underwent intraprocedural 120-lead body-surface potential mapping (BSPM)...
April 27, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29701384/endothelial-function-and-vascular-properties-in-severe-aortic-stenosis-before-and-after-aortic-valve-replacement-surgery
#13
Renata Melo, Francisca A Saraiva, Ana Filipa Ferreira, Soraia Moreira, Raquel Moreira, Rui J Cerqueira, Mário J Amorim, Paulo Pinho, André P Lourenço, Adelino F Leite-Moreira
INTRODUCTION: The degenerative process that results in aortic valve stenosis (AS) has pathophysiological features similar to the atherosclerotic process. We therefore hypothesized that, as in atherosclerosis, endothelial and vascular dysfunction could be a pathophysiologic feature of AS. AIM: To evaluate endothelial function before and after aortic valve replacement (AVR) surgery in patients with severe AS. To correlate endothelial function with severity of AS and clinical profile...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29700057/how-accurate-is-inverse-electrocardiographic-mapping-a-systematic-in-vivo-evaluation
#14
Laura R Bear, Ian J LeGrice, Gregory B Sands, Nigel A Lever, Denis S Loiselle, David J Paterson, Leo K Cheng, Bruce H Smaill
BACKGROUND: Inverse electrocardiographic mapping reconstructs cardiac electrical activity from recorded body surface potentials. This noninvasive technique has been used to identify potential ablation targets. Despite this, there has been little systematic evaluation of its reliability. METHODS: Torso and ventricular epicardial potentials were recorded simultaneously in anesthetized, closed-chest pigs (n=5), during sinus rhythm, epicardial, and endocardial ventricular pacing (70 records in total)...
May 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29688154/use-of-myocardial-t1-mapping-at-3-0-t-to-differentiate-anderson-fabry-disease-from-hypertrophic-cardiomyopathy
#15
Gauri R Karur, Sean Robison, Robert M Iwanochko, Chantal F Morel, Andrew M Crean, Paaladinesh Thavendiranathan, Elsie T Nguyen, Shobhit Mathur, Syed Wasim, Kate Hanneman
Purpose To compare left ventricular (LV) and right ventricular (RV) 3.0-T cardiac magnetic resonance (MR) imaging T1 values in Anderson-Fabry disease (AFD) and hypertrophic cardiomyopathy (HCM) and evaluate the diagnostic value of native T1 values beyond age, sex, and conventional imaging features. Materials and Methods For this prospective study, 30 patients with gene-positive AFD (37% male; mean age ± standard deviation, 45.0 years ± 14.1) and 30 patients with HCM (57% male; mean age, 49.3 years ± 13.5) were prospectively recruited between June 2016 and September 2017 to undergo cardiac MR imaging T1 mapping with a modified Look-Locker inversion recovery (MOLLI) acquisition scheme at 3...
April 24, 2018: Radiology
https://www.readbyqxmd.com/read/29681243/association-between-myocardial-extracellular-volume-and-strain-analysis-through-cardiovascular-magnetic-resonance-with-histological-myocardial-fibrosis-in-patients-awaiting-heart-transplantation
#16
Yue Cui, Yukun Cao, Jing Song, Nianguo Dong, Xiangchuang Kong, Jing Wang, Yating Yuan, Xiaolei Zhu, Xu Yan, Andreas Greiser, Heshui Shi, Ping Han
BACKGROUND: Cardiovascular magnetic resonance (CMR)-derived extracellular volume (ECV) and tissue tracking strain analyses are proposed as non-invasive methods for quantifying myocardial fibrosis and deformation. This study sought (1) to histologically validate myocardial ECV against the collagen volume fraction (CVF) measured from tissue samples of patients undergoing heart transplantation and (2) to detect the correlations between myocardial systolic strain and the myocardial ECV and histological CVF in patients undergoing heart transplantation...
April 23, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29673122/native-myocardial-t1-time-can-predict-development-of-subsequent-anthracycline-induced-cardiomyopathy
#17
Fabian Muehlberg, Stephanie Funk, Leonora Zange, Florian von Knobelsdorff-Brenkenhoff, Edyta Blaszczyk, Alexander Schulz, Saeed Ghani, Annete Reichardt, Peter Reichardt, Jeanette Schulz-Menger
AIMS: This study aims to assess subclinical changes in functional and morphological myocardial magnetic resonance parameters very early into an anthracycline treatment, which may predict subsequent development of anthracycline-induced cardiomyopathy (aCMP). METHODS AND RESULTS: Thirty sarcoma patients with planned anthracycline-based chemotherapy (360-400 mg/m2 doxorubicin-equivalent) were recruited. Median treatment time was 19.1 ± 2.1 weeks. Enrolled individuals received three cardiovascular magnetic resonance studies (before treatment, 48 h after first anthracycline treatment, and upon completion of treatment)...
April 19, 2018: ESC Heart Failure
https://www.readbyqxmd.com/read/29661538/an-unusual-case-of-anti-mog-cns-demyelination-with-concomitant-mild-anti-nmdar-encephalitis
#18
Jiajia Zhou, Winwen Tan, Suyin Elaine Tan, Jing Hu, Zhongqin Chen, Kang Wang
We report the case of a patient who presented with progressive unsteadiness and narcoleptic attacks followed by behavioral change and psychosis, without visual disturbances or seizures. MRI revealed multiple areas of fluid attenuation inversion recovery (FLAIR) high-intensity lesions involving the cerebellum, brainstem, thalamus and third ventricular peri-ependymal region consistent with demyelination. Both the serum myelin oligodendrocyte glycoprotein-antibodies (MOG-Abs) and cerebral spinal fluid (CSF) anti-N-methyl-d-as-partate receptor (NMDAR) antibodies were positive using transfected cell based assays...
April 6, 2018: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29650706/pro-inflammatory-biomarkers-in-stable-versus-acutely-decompensated-heart-failure-with-preserved-ejection-fraction
#19
Abraham Abernethy, Sadi Raza, Jie-Lena Sun, Kevin J Anstrom, Russell Tracy, Johannes Steiner, Peter VanBuren, Martin M LeWinter
BACKGROUND: Underlying inflammation has been increasingly recognized in heart failure with a preserved ejection fraction (HFpEF). In this study we tested the hypothesis that pro-inflammatory biomarkers are elevated in patients with acutely decompensated HFpEF (AD-HFpEF) compared with patients with stable HFpEF (S-HFpEF). METHODS AND RESULTS: Using a post hoc analysis the serum biomarkers tumor necrosis factor-alpha, high-sensitivity C-reactive protein interleukin 6 and pentraxin 3 (PTX3) and clinical, demographic, echocardiographic-Doppler and clinical outcomes data were analyzed in HFpEF patients enrolled in NHLBI Heart Failure Research Network clinical trials which enrolled patients with either AD-HFpEF or S-HFpEF...
April 12, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29648475/alterations-in-plasma-l-arginine-and-methylarginines-in-heart-failure-and-after-heart-transplantation
#20
Jakob Lundgren, Anna Sandqvist, Mikael Hedeland, Ulf Bondesson, Gerhard Wikström, Göran Rådegran
OBJECTIVE: Endothelial function, including the nitric oxide (NO)-pathway, has previously been extensively investigated in heart failure (HF). In contrast, studies are lacking on the NO pathway after heart transplantation (HT). We therefore investigated substances in the NO pathway prior to and after HT in relation to hemodynamic parameters. DESIGN: 12 patients (median age 50.0 yrs, 2 females), heart transplanted between June 2012 and February 2014, evaluated at our hemodynamic lab, at rest, prior to HT, as well as four weeks and six months after HT were included...
April 12, 2018: Scandinavian Cardiovascular Journal: SCJ
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