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https://www.readbyqxmd.com/read/28104089/prediction-of-radiofrequency-ablation-lesion-formation-using-a-novel-temperature-sensing-technology-incorporated-in-a-force-sensing-catheter
#1
Guy Rozen, Leon Ptaszek, Israel Zilberman, Kevin Cordaro, E Kevin Heist, Christopher Beeckler, Andres Altmann, Zhang Ying, Zhenjiang Liu, Jeremy N Ruskin, Assaf Govari, Moussa Mansour
BACKGROUND: Real-time radiofrequency (RF) ablation lesion assessment is a major unmet need in cardiac electrophysiology. OBJECTIVE: The purpose of this study was to assess whether improved temperature measurement using a novel thermocoupling (TC) technology combined with information derived from impedance change, contact force (CF) sensing, and catheter orientation allows accurate real-time prediction of ablation lesion formation. METHODS: RF ablation lesions were delivered in the ventricles of 15 swine using a novel externally irrigated-tip catheter containing 6 miniature TC sensors in addition to force sensing technology...
February 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28101960/effects-of-antegrade-accessory-pathway-conduction-on-qrs-terminal-vector-in-patients-with-pre-excitation-syndrome
#2
Renguang Liu, Q I Chen, Yang Chen, Yingjie Zhang, Zhaolong Xu, Gaopin Wang
BACKGROUND: Ventricle pre-excitation through accessory pathway changes QRS initial vector, and manifests as delta wave on ECG. However, QRS terminal vector can also be affected. METHODS: 158 patients who had single accessory pathway (AP) with antegrade conduction capacity were included and divided into 2 groups according to the ECG with or without delta wave. In 150 patients had delta wave (overt AP group) on ECG, classical pre-excitation syndrome was diagnosed before radiofrequency ablation (RFCA)...
January 19, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28100981/isolated-left-subclavian-artery-complete-atrioventricular-block-and-tricuspid-atresia-in-a-neonate
#3
Kanupriya Chaturvedi, Deepa Prasad, Ravi Ashwath, James P Strainic, Christopher S Snyder
Isolated left subclavian artery is one of the rarer aortic arch anomalies. It has been associated with other congenital heart diseases, typically tetralogy of Fallot, double-outlet right ventricle, and atrial and ventricular septal defects. Its significant clinical implications include a left-to-right shunt from the vertebrobasilar system, which causes pulmonary overcirculation and subclavian steal. We present an unusual case of a premature infant who was diagnosed prenatally with congenital complete atrioventricular block and tricuspid atresia and was found to have an isolated left subclavian artery postnatally...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100974/percutaneous-embolectomy-of-serpentine-thrombus-from-the-right-atrium-in-a-51-year-old-man
#4
Soumya Patnaik, Harish Seetha Rammohan, Mahek Shah, Shivani Garg, Vincent Figueredo, Sean Janzer, Salil Shah
Treatment of large, fresh thrombi in the vascular system can be challenging. AngioVac, a cardiopulmonary pump system, has been used to remove large thrombi and even some tumors by a percutaneous route. We report here a case of a 51-year-old man who presented with a large thrombus (7.5 × 1.5 cm) in his inferior vena cava, extending into his right atrium and right ventricle. Because the surgical risk was high, we attempted percutaneous embolectomy via the AngioVac aspiration system. We also review the literature concerning this emerging technique...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28099680/novel-putative-pharmacologic-therapies-to-protect-the-right-ventricle-in-pulmonary-hypertension-a-review-of-current-literature
#5
REVIEW
Gerald J Maarman, Rainer Schulz, Karen Sliwa, Ralph Schermuly, Sandrine Lecour
Pulmonary hypertension (PH) is defined by elevated mean pulmonary artery pressure following the pathologic remodelling of small pulmonary arteries. An increase in right ventricular (RV) afterload results in RV hypertrophy and RV failure. The pathophysiology of PH, and RV remodelling in particular, are not well understood, thus explaining, at least in part, why current PH therapies have a limited effect. Existing therapies mostly target the pulmonary circulation. Because the remodelled RV fails to support normal cardiac function, patients eventually succumb from RV failure...
January 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28098434/method-for-the-unique-identification-of-hyperelastic-material-properties-using-full-field-measures-application-to-the-passive-myocardium-material-response
#6
Luigi E Perotti, Aditya V Ponnaluri, Shankarjee Krishnamoorthi, Daniel Balzani, Daniel B Ennis, William S Klug
Quantitative measurement of the material properties (e.g., stiffness) of biological tissues is poised to become a powerful diagnostic tool. There are currently several methods in the literature to estimating material stiffness and we extend this work by formulating a framework that leads to uniquely identified material properties. We design an approach to work with full field displacement data - i.e., we assume the displacement field due to the applied forces is known both on the boundaries and also within the interior of the body of interest - and seek stiffness parameters that lead to balanced internal and external forces in a model...
January 18, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28096864/feline-dirofilariosis-due-to-dirofilaria-immitis-in-meshkin-shahr-district-northwestern-iran
#7
Mahya Khodabakhsh, Abdolali Malmasi, Mehdi Mohebali, Zabihollah Zarei, Eshrat Beigom Kia, Amrollah Azarm
BACKGROUND: Dirofilaria immitis is a common nematode of the cardiovascular system, which infects carnivores all over the world. The infection is prevalent in dogs, but in cats and human is rare. Dirofilariosis is transmitted by mosquitoes. Cats are accidental hosts and are naturally resistant to the infection, compared to the dogs. Mild infection can cause severe illness in cats and may lead to death, so it is clinically important to diagnose the disease. METHODS: In the present study, 103 stray cats were collected from Meshkin Shahr district, Aradabil Province, northwestern Iran that is an endemic area for canine dirofilariosis...
April 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28095748/myocardial-inactivation-of-thyroid-hormones-in-patients-with-aortic-stenosis
#8
Bruno Paolino, Pablo Maria Pomerantzeff, Luiz Alberto O Dallan, Fabio Antonio Gaiotto, Nailliw Zanini Preite, Ana Claudia Latronico, Jose Carlos Nicolau, Antonio Carlos Bianco, Roberto Giraldez
OBJECTIVE: To study myocardial thyroid hormone metabolism in patients with aortic valve stenosis (AS) undergoing aortic valve replacement and in patients with coronary artery disease (CAD) undergoing coronary artery bypass grafting surgery. CONTEXT: The human heart expresses the type 2 deiodinase (D2) that activates T4 to T3. At the same time, the inactivating type 3 deiodinase (D3) has been found in a rat model of right ventricular hypertrophy. It is not known whether the human myocardium metabolizes thyroid hormone...
January 17, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28093805/heartware-ventricular-assist-device-implantation-in-patients-with-fontan-physiology
#9
Bartlomiej R Imielski, Robert A Niebler, Steven J Kindel, Ronald K Woods
We aim to describe the clinical course of a series of patients with hypoplastic left heart syndrome and refractory systolic heart failure supported with a HeartWare ventricular assist device (HVAD) following Fontan palliation. This is a retrospective review of three consecutive patients supported with a HVAD following Fontan palliation through February 2016. Data include patient characteristics, operative variables, postimplantation hemodynamic/device parameters, event outcomes, and duration of HVAD support...
January 2017: Artificial Organs
https://www.readbyqxmd.com/read/28093270/cardiac-magnetic-resonance-tissue-tracking-in-right-ventricle-feasibility-and-normal-values
#10
Vien T Truong, Komal S Safdar, Dinesh K Kalra, Xuexin Gao, Stephanie Ambach, Michael D Taylor, Ryan Moore, Robin J Taylor, Joshua Germann, Olga Toro-Salazar, John L Jefferies, Cheryl Bartone, Subha V Raman, Tam Ngo, Wojciech Mazur
PURPOSE: To investigate right ventricular (RV) strain in patients without identified cardiac pathology using cardiac magnetic resonance tissue tracking (CMR TT). METHODS: A total of 50 consecutive patients with no identified cardiac pathology were analyzed. RV longitudinal and circumferential strain was assessed by CMR TT. The age range was 4-81years with a median of 32years (interquartile range, 15 to 56years). RESULTS: Analysis time per patient was <5min...
January 13, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28092278/delayed-onset-central-pain-due-to-degeneration-of-ischemic-transcallosal-fibers-after-corpus-callosum-hemorrhage
#11
Sung Ho Jang, Chul Hoon Chang, Young Jin Jung, Han Do Lee
AIMS: A patient developed delayed-onset central pain due to degeneration of the spinothalamic tract resulting from degeneration of the ischemic transcallosal fibers, in the aftermath of a corpus callosum (CC) hemorrhage. The detection and diagnosis of these lesions using diffusion tensor tractography are described. METHODS: A 59-yr-old man underwent conservative management for hemorrhages in the CC and lateral ventricle that resulted from hitting his head against a wall while falling...
January 13, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28091901/contractility-of-right-ventricular-myocardium-in-male-and-female-rats-during-physiological-and-pathological-hypertrophy
#12
Yu L Protsenko, A A Balakin, D A Kuznetsov, A G Kursanov, R V Lisin, E A Mukhlynina, O N Lookin
Sex differences in the morphogenesis and adaptation of the mechanisms controlling myocardium contractility during physiological and pathological hypertrophy of the right ventricle were demonstrated in mature rats. The study revealed sex-dependent effects of physiological and pathological cardiac hypertrophy on the coefficient of variation of the cardiomyocyte diameter, length-dependent control of the contractile force, and the maximum velocity of isotonic shortening.
January 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28090817/coronary-or-ventricular-rupture-after-blunt-chest-trauma-a-clinical-dilemma
#13
Anton Sabashnikov, Guido Michels, Javid Fatullayev, Kaveh Eghbalzadeh, Mohamed Zeriouh, Stephan Baldus, Jens Wippermann, Thorsten Wahlers, Navid Madershahian
Cardiac rupture (CR) is one of the most serious and life-threatening complications of blunt chest trauma (BCT) usually associated with high mortality. Moreover, its diagnosis and treatment strategies may be extremely challenging for clinicians due to various anatomical localisations of the tear. Whereas most injuries fall under the category of right atrial ruptures, left ventricular lesions represent a rare type of this injury, with greater mortality, particularly in cases of multi-chamber injuries. However, not only cardiac chamber or great vessel ruptures may occur as a result of BCT; a growing number of reports also describe BCT-induced isolated coronary artery injuries, including ruptures...
January 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28090137/echocardiographic-assessment-of-right-ventricle-adaptation-to-endurance-training-in-young-rowers-speckle-tracking-echocardiography
#14
M Konopka, W Krol, K Burkhard-Jagodzinska, A Jakubiak, A Klusiewicz, J Chwalbinska, A Pokrywka, D Sitkowski, M Dluzniewski, W Braksator
The aim of this study was to determine the relationship between the degree of cardiorespiratory fitness and the function of the right ventricle (RV). 117 rowers, age 17.5±1.5 years. All subjects underwent cardiopulmonary exercise. Standard echocardiography and 2D speckle tracking echocardiography with evaluation of longitudinal strain in each segment of the RV (basal - RVLS-B; mid - RVLS-M, apical - RVLS-A) and global RV free-wall strain (RVLS-G) were performed. RVLS-B values were lower compared to the RVLS-M (-25...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28088601/mid-term-outcomes-in-patients-with-congenitally-corrected-transposition-of-the-great-arteries-a-single-center-experience
#15
Luis E De León, Carlos M Mery, Raymond A Verm, Daniel Trujillo-Díaz, Ankita Patro, Francisco A Guzmán-Pruneda, Iki Adachi, Jeffrey S Heinle, Lauren C Kane, E Dean McKenzie, Charles D Fraser
INTRO: The optimal management of patients with congenitally-corrected transposition of the great arteries (ccTGA) is unclear. The goal of this study was to compare the outcomes in patients with ccTGA undergoing different management strategies. METHODS: Patients with ccTGA believed suitable for biventricular circulation treated in 1995-2016 were included. The cohort was divided into four groups: systemic right ventricle (RV) (patients without surgical intervention or with a classic repair), anatomic repair, Fontan palliation, and patients only receiving a pulmonary artery band (PAB) or a shunt...
January 11, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28088193/invasive-cardiac-lipoma-a-case-report-and-review-of-literature
#16
Jason D'Souza, Rajesh Shah, Aamer Abbass, Jeremy R Burt, Aditya Goud, Chanukya Dahagam
BACKGROUND: Cardiac lipomas are rare benign tumors of the heart. They are usually asymptomatic and are thus most often diagnosed on autopsies. Symptoms, when present, depend upon the location within the heart. Typical locations are the endocardium of the right atrium and the left ventricle. Diagnostic modality of choice is cardiac MRI. Treatment guidelines have not yet been established due to the very low prevalence of these tumors and are thus guided by the patient's symptomatology. CASE PRESENTATION: We describe a case of an invasive cardiac lipoma, wherein the initial symptom of the patient was shortness of breath...
January 14, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28087519/sympathetic-modulation-of-electrical-activation-in-normal-and-infarcted-myocardium-implications-for-arrhythmogenesis
#17
Olujimi A Ajijola, Robert L Lux, Anadjeet Khahera, OhJin Kwon, Eric Aliotta, Daniel Ennis, Michael C Fishbein, Jeffrey Laurence Ardell, Kalyanam Shivkumar
: Background The influence of cardiac sympathetic innervation on electrical activation in normal and chronically infarcted ventricular myocardium is not understood. Methods and Results Yorkshire pigs with normal hearts (NL, n=12) or anterior myocardial infarction (MI, n=9) underwent high-resolution mapping of the anteroapical left ventricle, at baseline, and during left and right stellate ganglion stimulation (LSGS & RSGS, respectively). Conduction velocity (CV), activation times (AT), & directionality of propagation were measured...
January 13, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28081512/association-between-herpes-simplex-virus-types-1-and-2-with-cardiac-myxoma
#18
Maryam Sotoudeh Anvari, Moud Sabagh, Hamidreza Goodarzynejad, Shayan Ziaei, Mohammad Ali Boroumand, Leyla Pourgholi, Yaser Jenab, Kyomars Abbasi
Most cases of atrial myxoma are sporadic, and the exact etiology is unknown. We examined if herpes simplex virus (HSV)-1 and HSV-2 antigens and/or DNA could be detected in a cohort of Iranian patients with cardiac myxomas. From July 2004 to June 2014, among a total of 36,703 patients undergoing open heart surgeries, consecutive patients with cardiac myxoma who were treated by surgical excision at our center included in this study. Of 73 patients studied, 56% were female with a mean age of 54 years (ranging from 23 to 77 years)...
January 3, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28079844/serum-interleukin-6-in-systemic-sclerosis-and-its-correlation-with-disease-parameters-and-cardiopulmonary-involvement
#19
Rasha A Abdel-Magied, Shereen R Kamel, Azza Farag Said, Hazem M Ali, Ehab A Abdel Gawad, Mahmoud M Moussa
OBJECTIVE: To assess serum interleukin-6 (IL-6)level in patients with systemic sclerosis (SSc) and its correlations with European Scleroderma Study Group activity score (EUSTAR), Scleroderma Assessment Questionnaire (SAQ), disability index and cardiopulmonary involvement. METHODS: Twenty SSc patients and 10 matched healthy controls were included. Serum IL-6 was measured in patients and controls. Disease activity, status,and disability were assessed.Cardiopulmonary involvement was evaluated by pulmonary function tests (PFTs), six minute walk test, echocardiography, and high resolution computed tomography (HRCT) of chest...
December 23, 2016: Sarcoidosis, Vasculitis, and Diffuse Lung Diseases: Official Journal of WASOG
https://www.readbyqxmd.com/read/28077908/magnetic-resonance-imaging-of-a-case-of-central-neurocytoma
#20
Kreshnike Dedushi, Serbeze Kabashi, Mehmet Sahin Ugurel, Naser Ramadani, Sefedin Mucaj, Kamber Zeqiraj
BACKGROUND: The purpose of this study is to investigate the MRI features of central neurocytoma. CASE REPORT: A 45 year old man with 3 months of worsening daily headaches. These headaches were diffuse, lasted for several hours, and mostly occurred in the morning. She was initially diagnosed and treated for migraines but later he had epileptic attack and diplopia and neurolog recomaded MRI. METHODS: precontrast MRI; TSE/T2Wsequence in axial/coronal planes; 3D-Hi-resolution T1W sagittal; FLAIR/T2W axial; FLAIR/T2W and Flash/T2W oblique coronal plane (perpendicular to temporal lobes) GRE/T2W axial plane for detection of heme products...
December 2016: Acta Informatica Medica: AIM
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