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Enlarged left ventricle

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https://www.readbyqxmd.com/read/28156163/post-infarct-sleep-disruption-and-its-relation-to-cardiac-remodeling-in-a-rat-model-of-myocardial-infarction
#1
Marjan Aghajani, Mahdieh Faghihi, Alireza Imani, Mohammad Reza Vaez Mahdavi, Abbas Shakoori, Tayebeh Rastegar, Hoda Parsa, Saman Mehrabi, Fatemeh Moradi, Ehsan Kazemi Moghaddam
Sleep disruption after myocardial infarction (MI) by affecting ubiquitin-proteasome system (UPS) is thought to contribute to myocardial remodeling and progressive worsening of cardiac function. The aim of current study was to test the hypothesis about the increased risk of developing heart failure due to experience of sleep restriction (SR) after MI. Male Wistar rats (n = 40) were randomly assigned to four experimental groups: (1) Sham, (2) MI, (3) MI and SR (MI + SR) (4) Sham and SR (Sham + SR). MI was induced by permanent ligation of left anterior descending coronary artery...
February 3, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28155693/numerical-simulation-of-closure-performance-for-neo-aortic-valve-for-arterial-switch-operation
#2
Zhaoyong Gu, Youlian Pan, Aike Qiao, Xingjian Hu, Nianguo Dong, Xiaofeng Li, Yinglong Liu, Deguang Shang
BACKGROUND: Modeling neo-aortic valve for arterial switch surgical planning to simulate the neo-aortic valve closure performance. METHODS: We created five geometrical models of neo-aortic valve, namely model A, model B, model C, model D and model E with different size of sinotubular junction or sinus. The nodes at the ends of aorta and left ventricle duct fixed all the degrees of freedom. Transvalvular pressure of normal diastolic blood pressure of 54 mmHg was applied on the neo-aortic valve cusps...
December 28, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28149413/left-atrial-enlargement-in-young-high-level-endurance-athletes-another-sign-of-athlete-s-heart
#3
Wojciech Król, Ilona Jędrzejewska, Marcin Konopka, Krystyna Burkhard-Jagodzińska, Andrzej Klusiewicz, Andrzej Pokrywka, Jolanta Chwalbińska, Dariusz Sitkowski, Mirosław Dłużniewski, Artur Mamcarz, Wojciech Braksator
Enlargement of the left atrium is perceived as a part of athlete's heart syndrome, despite the lack of evidence. So far, left atrial size has not been assessed in the context of exercise capacity. The hypothesis of the present study was that LA enlargement in athletes was physiological and fitness-related condition. In addition, we tried to assess the feasibility and normal values of left atrial strain parameters and their relationship with other signs of athlete's heart. The study group consisted of 114 international-level rowers (17...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28065377/prognostic-value-of-computed-tomography-pulmonary-angiography-indices-in-patients-with-cancer-related-pulmonary-embolism-data-from-a-multicenter-cohort-study
#4
Juana María Plasencia-Martínez, Alberto Carmona-Bayonas, David Calvo-Temprano, Paula Jiménez-Fonseca, Francisco Fenoy, Mariana Benegas, Marcelo Sánchez, Carme Font, Diego Varona, David Martínez de la Haza, Jesús Pueyo, Mercè Biosca, Maite Antonio, Carmen Beato, Pilar Solís, Laura Fáez, Irma de Al Haba, Susana Hernández-Muñiz, Olga Madridano, Mar Martín, Eduardo Castañón, Avinash Ramchandani, Pablo Marchena, Manuel Sánchez-Cánovas, María Ángeles Vicente, Mari José Martínez, Ángela Fernández-Plaza, Lourdes Martínez-Encarnación, Alejandro Puerta, Ángel Domínguez, Daniel Rodríguez, Gema Marín, Remedios Otero, Fernando Sánchez-Lasheras, Vicente Vicente
OBJECTIVE: To analyze the prognostic value of pulmonary artery obstruction versus right-ventricle (RV) dysfunction radiologic indices in cancer-related pulmonary embolism (PE). METHODS: We enrolled 303 consecutive patients with paraneoplastic PE, evaluated by computed tomography pulmonary angiography (CTPA) between 2013 and 2014. The primary outcome measure was serious complications at 15days. Multivariate analyses were conducted by using binary logistic and robust regressions...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28056870/anti-n-methyl-d-aspartate-receptor-nmdar-antibody-encephalitis-presents-in-atypical-types-and-coexists-with-neuromyelitis-optica-spectrum-disorder-or-neurosyphilis
#5
Kaiyu Qin, Wenqing Wu, Yuming Huang, Dongmei Xu, Lei Zhang, Bowen Zheng, Meijuan Jiang, Cheng Kou, Junhua Gao, Wurong Li, Jinglin Zhang, Sumei Wang, Yanfei Luan, Chaoling Yan, Dan Xu, Xinmei Zheng
BACKGROUND: Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a clinically heterogeneous disorder characterized by epileptic seizures, psychosis, dyskinesia, consciousness impairments, and autonomic instability. Symptoms are always various. Sometimes it presents in milder or incomplete forms. We report 4 cases of anti-NMDAR encephalitis with incomplete forms, 3 cases of which were accompanied by neuromyelitis optica spectrum disorder or neurosyphilis respectively. CASE PRESENTATION: A 33-year-old man presented with dysarthria, movement disorder and occasional seizures...
January 5, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28054710/atypical-surface-ecg-complicating-the-diagnosis-of-bundle-branch-reentry-tachycardia
#6
Christopher Reithmann, Bernhard Herkommer, Thomas Remp, Michael Fiek
BACKGROUND: Typical left bundle branch block (LBBB) during ventricular tachycardia (VT) is a diagnostic criterion of bundle branch reentry tachycardia (BBRT) with activation of the right bundle in the anterograde direction. METHODS AND RESULTS: 11 patients (7 male, 60 ± 12 years) with non-ischemic cardiomyopathy (left ventricular ejection fraction 37 ± 16 %) presenting with BBRT were successfully treated by ablation of the right bundle. Among them, 5 patients had atypical surface ECGs differing from a typical left bundle branch block during the VT...
January 5, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28013288/structural-cerebral-abnormalities-and-neurodevelopmental-status-in-single-ventricle-congenital-heart-disease-before-fontan-procedure
#7
Walter Knirsch, Kristina Nadine Mayer, Ianina Scheer, Ruth Tuura, Dietmar Schranz, Andreas Hahn, Kristina Wetterling, Ingrid Beck, Beatrice Latal, Bettina Reich
OBJECTIVES: Neonates with single ventricle congenital heart disease are at risk for structural cerebral abnormalities. Little is known about the further evolution of cerebral abnormalities until Fontan procedure. METHODS: Between August 2012 and July 2015, we conducted a prospective cross-sectional two centre study using cerebral magnetic resonance imaging (MRI) and neuro-developmental outcome assessed by the Bayley-III. Forty-seven children (31 male) were evaluated at a mean age of 25...
December 23, 2016: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28002328/chronic-disseminated-intravascular-coagulation-induced-by-left-atrial-thrombus-in-a-patient-with-giant-normal-heart-a-case-report
#8
Qianqian Shao, Ran Tian, Xu Zhang, Xin Gao, Jinzhi Lai, Zhuang Tian, Xiaowei Yan, Shuyang Zhang
INTRODUCTION: We herein describe a patient with chronic disseminated intravascular coagulation (DIC) induced by a giant thrombus in the left atrium.A 63-year-old woman was admitted to our hospital for evaluation of extensive mucocutaneous hemorrhage, especially at the sites of venipuncture, on May 21, 2015. Considering her long history of rheumatic heart disease and atrial fibrillation and her mitral valve replacement performed several years previously, we strongly suspected that the bleeding was closely related to postoperative over-anticoagulation of warfarin...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27848162/characterizing-the-spectrum-of-right-ventricular-remodelling-in-response-to-chronic-training
#9
Marta Sitges, Beatriz Merino, Constatine Butakoff, Maria Sanz de la Garza, Carles Paré, Silvia Montserrat, Barbara Vidal, Manel Azqueta, Georgia Sarquella, Josep Antoni Gutierrez, Ramon Canal, Josep Brugada, Bart H Bijnens
The significance and spectrum of reduced right ventricular (RV) deformation, reported in endurance athletes, is unclear. To comprehensively analyze the cardiac performance at rest of athletes, especially focusing on integrating RV size and deformation to unravel the underlying triggers of this ventricular remodelling. Hundred professional male athletes and 50 sedentary healthy males of similar age were prospectively studied. Conventional echocardiographic parameters of all four chambers were obtained, as well as 2D echo-derived strain (2DSE) in the left (LV) and in the RV free wall with separate additional analysis of the RV basal and apical segments...
November 15, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27847200/reduction-of-atrial-fibrillation-by-tanshinone-iia-in-chronic-heart-failure
#10
Zhifeng He, Changzheng Sun, Yi Xu, Dezhi Cheng
The aim of the present study was to confirm the effect of Tanshinone IIA (TAN) on the prevention of AF in chronic heart failure (CHF), and to elucidate the underlying electrophysiological mechanisms for the antiarrhythmic effects of TAN at the level of the atrium in an experimental model of CHF. In 10 female rabbits, CHF was induced by rapid ventricular pacing, leading to a significant decrease in ejection fraction in the presence of a dilated left ventricle and atrial enlargement. Twelve rabbits were sham-operated and served as controls...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27844058/western-high-fat-diet-consumption-during-adolescence-increases-susceptibility-to-traumatic-stress-while-selectively-disrupting-hippocampal-and-ventricular-volumes
#11
Priya Kalyan-Masih, Julio David Vega-Torres, Christina Miles, Elizabeth Haddad, Sabrina Rainsbury, Mohsen Baghchechi, Andre Obenaus, Johnny D Figueroa
Psychological trauma and obesity co-occur frequently and have been identified as major risk factors for psychiatric disorders. Surprisingly, preclinical studies examining how obesity disrupts the ability of the brain to cope with psychological trauma are lacking. The objective of this study was to determine whether an obesogenic Western-like high-fat diet (WD) predisposes rats to post-traumatic stress responsivity. Adolescent Lewis rats (postnatal day 28) were fed ad libitum for 8 weeks with either the experimental WD diet (41...
September 2016: ENeuro
https://www.readbyqxmd.com/read/27827800/quantification-of-cerebral-lateral-ventricular-volume-in-cats-by-low-and-high-field-mri
#12
Paulina Przyborowska, Zbigniew Adamiak, Yauheni Zhalniarovich
OBJECTIVES: The aim of this study was to evaluate variations in lateral ventricles in the examined feline population with the use of quantitative analysis methods to determine whether sex or body weight influenced the size of the ventricles, and to identify any significant differences in the results of low- and high-field MRI. METHODS: Twenty healthy European Shorthair cats, aged 1-3 years, with body weight of 2.85-4.35 kg, were studied. MRI of brain structures was performed in a low- and a high-field MRI system...
November 8, 2016: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/27818454/vidarabine-an-anti-herpes-virus-agent-protects-against-the-development-of-heart-failure-with-relatively-mild-side-effects-on-cardiac-function-in-a-canine-model-of-pacing-induced-dilated-cardiomyopathy
#13
Takashi Nakamura, Takayuki Fujita, Megumi Kishimura, Kenji Suita, Yuko Hidaka, Wenqian Cai, Masanari Umemura, Utako Yokoyama, Masami Uechi, Yoshihiro Ishikawa
BACKGROUND: In heart failure patients, chronic hyperactivation of sympathetic signaling is known to exacerbate cardiac dysfunction. In this study, the cardioprotective effect of vidarabine, an anti-herpes virus agent, which we identified as a cardiac adenylyl cyclase inhibitor, in dogs with pacing-induced dilated cardiomyopathy (DCM) was evaluated. In addition, the adverse effects of vidarabine on basal cardiac function was compared to those of the β-blocker, carvedilol.Methods and Results:Vidarabine and carvedilol attenuated the development of pacing-induced systolic dysfunction significantly and with equal effectiveness...
November 25, 2016: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/27807020/miliary-tuberculosis-in-an-immunocompetent-male-with-a-fatal-outcome
#14
Louise Dunphy, Elizabeth Keating, T Parke
A man aged 33 years, born in Nepal, but resident in the UK for 7 years presented to the emergency department with a 4-day history of general malaise, fever (temperature 38.6°C) and a non-productive cough. His medical history was unremarkable and no high-risk behaviour was identified. Clinical examination confirmed decreased air entry bilaterally with bibasal crackles. He was tachycardic, with a heart rate of 120 bpm. Further investigation with a 12-lead ECG confirmed supraventricular tachycardia (SVT) which was terminated with vagal manoeuvres...
November 2, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27806176/abrupt-onset-of-refractory-heart-failure-associated-with-light-chain-amyloidosis-in-hypertrophic-cardiomyopathy
#15
Benedetta Tomberli, Francesco Cappelli, Federico Perfetto, Iacopo Olivotto
Importance: The natural history of hypertrophic cardiomyopathy (HCM) is complex and may include progressive heart failure and severe left ventricular dysfunction. When disease progression is abrupt, however, other coexisting diseases should be ruled out. This may be difficult in the case of amyloidosis, which classically mimics HCM. Results: We present an example of severe clinical deterioration in a patient with HCM due to superimposed amyloid light-chain amyloidosis...
January 1, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/27797350/ecg-case-of-the-month-heart-failure-in-a-man-from-chile
#16
D Luke Glancy, Glenn A Cochran, Frederick R Helmcke
A 49-year-old man visiting New Orleans from Chile comes to the hospital complaining of exertional dyspnea for 2 months with the more recent onset of ankle edema. He is a slender man with a blood pressure of 91/60 mmHg, crackles at both lung bases, and markedly distended neck veins. His cardiac rhythm is irregular. A soft murmur of mitral regurgitation and a soft S-3 are heard at the left ventricular apex. All four pedal pulses are easily palpable. Epigastric tenderness is noted on palpation; although the patient has a history of peptic ulcer disease, the tenderness is probably due to an enlarged left lobe of his liver, the result of hepatic congestion from his heart failure...
September 2016: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/27776714/assessment-for-pulmonary-artery-hypertension-using-clinical-and-echocardiographic-criteria-in-patients-with-systemic-sclerosis
#17
Nadera Methia, Samia Latreche, Omar Ait Mokhtar, Jean-Jacques Monsuez, Salim Benkhedda
BACKGROUND: Prognosis of systemic sclerosis (SSc) is affected by pulmonary artery hypertension (PAH). METHODS: Among 202 patients (mean age: 46.1 ± 13.3 years; 177 women) with SSc, those with a tricuspid regurgitation (TR) jet maximal velocity at 2D-echocardiography (2DE) < 2.8m/second were not considered at high risk for PAH, whereas those with a TR velocity >3m/second or between 2.8 and 3m/second and associated with dyspnea were. RESULTS: Among 22 patients at risk, 15 (mean age: 50...
October 2016: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/27774273/reversible-transition-from-a-hypertrophic-to-a-dilated-cardiomyopathy
#18
Frank Spillmann, Uwe Kühl, Sophie Van Linthout, Fernando Dominguez, Felicitas Escher, Heinz-Peter Schultheiss, Burkert Pieske, Carsten Tschöpe
We report the case of a 17-year-old female patient with known hypertrophic cardiomyopathy and a Wolff-Parkinson-White syndrome. She came to our department for further evaluation of a new diagnosed dilated cardiomyopathy characterized by an enlargement of the left ventricle and a fall in ejection fraction. Clinically, she complained about atypical chest pain, arrhythmic episodes with presyncopal events, and dyspnea (NYHA III) during the last 6 months. Non-invasive and invasive examinations including magnetic resonance imaging, electrophysiological examinations, and angiography did not lead to a conclusive diagnosis...
June 2016: ESC Heart Failure
https://www.readbyqxmd.com/read/27751702/prognostic-value-of-right-ventricular-dysfunction-markers-for-serious-adverse-events-in-acute-normotensive-pulmonary-embolism
#19
Anthony J Weekes, Angela K Johnson, Daniel Troha, Gregory Thacker, Jordan Chanler-Berat, Michael Runyon
BACKGROUND: Right ventricular dysfunction (RVD) in pulmonary embolism (PE) has been associated with increased morbidity. Tools for RVD identification are not well defined. The prognostic value of RVD markers to predict serious adverse events (SAE) during hospitalization is unclear. OBJECTIVE: Prospectively compare the incidence of SAE in normotensive emergency department patients with PE based upon RVD by goal-directed echocardiography (GDE), cardiac biomarkers, and right-to-left ventricle ratio by computed tomography (CT)...
February 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27720201/undersized-mitral-annuloplasty-increases-strain-in-the-proximal-lateral-left-ventricular-wall
#20
Joe Luis Pantoja, Ashley E Morgan, Eugene A Grossi, Morten O Jensen, Jonathan W Weinsaft, Robert A Levine, Liang Ge, Mark B Ratcliffe
BACKGROUND: Recurrence of mitral regurgitation (MR) after undersized mitral annuloplasty (MA) for ischemic MR is as high as 60%, with the recurrence rate likely due to continued dilation of the left ventricle (LV). To better understand the causes of recurrent MR, we studied the effect of undersized MA on strain in the LV wall. We hypothesize that the acute change in ventricular shape induced by MA will cause increased strain in regions nearest the mitral valve. METHODS: Finite element models were previously reported, based on cardiac magnetic resonance images of 5 sheep with mild to moderate ischemic MR...
October 5, 2016: Annals of Thoracic Surgery
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