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https://www.readbyqxmd.com/read/28731029/nrp2-is-sufficient-to-instruct-circuit-formation-of-mitral-cells-to-mediate-odour-induced-attractive-social-responses
#1
Kasumi Inokuchi, Fumiaki Imamura, Haruki Takeuchi, Ryang Kim, Hiroyuki Okuno, Hirofumi Nishizumi, Haruhiko Bito, Takefumi Kikusui, Hitoshi Sakano
Odour information induces various innate responses that are critical to the survival of the individual and for the species. An axon guidance molecule, Neuropilin 2 (Nrp2), is known to mediate targeting of olfactory sensory neurons (primary neurons), to the posteroventral main olfactory bulb (PV MOB) in mice. Here we report that Nrp2-positive (Nrp2(+)) mitral cells (MCs, second-order neurons) play crucial roles in transmitting attractive social signals from the PV MOB to the anterior part of medial amygdala (MeA)...
July 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28730170/predictions-and-outcomes-of-atrial-fibrillation-in-the-patients-with-acute-myocardial-infarction
#2
Mihailo Vukmirović, Aneta Bošković, Irena Tomašević Vukmirović, Radoje Vujadinovic, Nikola Fatić, Zoran Bukumirić, Filip Vukmirović
The large epidemiological studies demonstrated that atrial fibrillation is correlated with high mortality and adverse events in patients with acute myocardial infarction. The aim of this study was to determinate predictors of atrial fibrillation develop during the hospital period in patients with acute myocardial infarction as well as short- and long-term mortality depending on the atrial fibrillation presentation. The 600 patients with an acute myocardial infarction were included in the study and follow-up 84 months...
2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/28728865/mass-spring-models-for-the-simulation-of-mitral-valve-function-looking-for-a-trade-off-between-reliability-and-time-efficiency
#3
O A Pappalardo, F Sturla, F Onorati, G Puppini, M Selmi, G B Luciani, G Faggian, A Redaelli, E Votta
Patient-specific finite element (FE) models can assess the impact of mitral valve (MV) repair on the complex MV anatomy and function. However, FE excessive time requirements hamper their use for surgical planning; mass-spring models (MSMs) represent a more approximate approach but can provide almost real-time simulations. On this basis, we implemented MSMs of three healthy MVs from cardiac magnetic resonance (cMR) imaging to simulate the systolic MV closure, including the in vivo papillary muscles and annular kinematics, and the anisotropic and non-linear mechanical response of MV tissues...
July 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28728784/mitral-annuloplasty-ring-suture-forces-impact-of-surgeon-ring-and-use-conditions
#4
Eric L Pierce, Charles H Bloodworth, Andrew W Siefert, Thomas F Easley, Tetsushi Takayama, Tomonori Kawamura, Robert C Gorman, Joseph H Gorman, Ajit P Yoganathan
OBJECTIVE: The study objective was to quantify the effect of ring type, ring-annulus sizing, suture position, and surgeon on the forces required to tie down and constrain a mitral annuloplasty ring to a beating heart. METHODS: Physio (Edwards Lifesciences, Irvine, Calif) or Profile 3D (Medtronic, Dublin, Ireland) annuloplasty rings were instrumented with suture force transducers and implanted in ovine subjects (N = 23). Tie-down forces and cyclic contractile forces were recorded and analyzed at 10 suture positions and at 3 levels of increasing peak left ventricular pressure...
June 21, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28728782/novel-nonresectional-mitral-valve-repair-another-tool-in-the-mitral-surgeon-s-armamentarium
#5
EDITORIAL
Malini Daniel, Pavan Atluri
No abstract text is available yet for this article.
June 20, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28728720/mitral-valve-repair-the-french-correction-versus-the-american-correction
#6
REVIEW
Sarah A Schubert, James H Mehaffey, Eric J Charles, Irving L Kron
Degenerative mitral valve disease causing mitral regurgitation is the most common organic valve pathology and is classified based on leaflet motion. The "French correction" mitral valve repair method restores normal valvular anatomy with extensive leaflet resection, chordal manipulation, and rigid annuloplasty. The American correction attempts to restore normal valve function through minimal leaflet resection, flexible annuloplasty, and use of artificial chordae. These differing methods of mitral valve repair reflect an evolution in principles, but both require understanding of the valve pathology and correction of leaflet prolapse and annular dilatation...
August 2017: Surgical Clinics of North America
https://www.readbyqxmd.com/read/28726430/-thoughts-about-valvular-abnormalities-yesterday-and-today
#7
Pavel Gregor, Hana Línková
The article deals with the problems of acquired valvular disorders. It mainly focuses on the new findings regarding ethiopathogenesis, diagnostics, evaluation and treatment, especially catheterization. In advanced countries, post-rheumatic abnormalities have almost disappeared, their current etiology has substantially changed (mitral stenosis). The earlier relatively rare degenerative changes now predominate, mainly affecting older patients (aortic stenosis). Also the treatment methods for acquired abnormalities have substantially changed - currently catheterization approaches are used more frequently in their correction...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/28725332/thyrotoxic-valvulopathy-case-report-and-review-of-the-literature
#8
Keniel Pierre, Sushee Gadde, Bassam Omar, G Mustafa Awan, Christopher Malozzi
We report a 42-year-old female who was admitted for abdominal pain, and also endorsed dyspnea, fatigue and chronic palpitations. Past medical history included asthma, patent ductus arteriosus repaired in childhood and ill-defined thyroid disease. Physical examination revealed blood pressure of 136/88 mm Hg and heart rate of 149 beats per minute. Cardiovascular exam revealed an irregularly irregular rhythm, and pulmonary exam revealed mild expiratory wheezing. Abdomen was tender. Electrocardiogram revealed atrial fibrillation with rapid ventricular response which responded to intravenous diltiazem...
June 2017: Cardiology Research
https://www.readbyqxmd.com/read/28725330/atrial-myxoma-mimicking-mitral-stenosis
#9
Michael Spartalis, Eleni Tzatzaki, Eleftherios Spartalis, Demetrios Moris, Antonios Athanasiou, Stamatios Kyrzopoulos, Dimitrios Tsiapras, Panagiotis Kalogris, Vassilis Voudris
Myxoma is the most common primary cardiac tumor and is usually located in the left atrium. Clinical manifestation relies in large part on the size, location, and architecture of the tumor. There are many reports in the literature of cardiac myxomas causing syncope, embolism, even myocardial infarction. We present a rare case of a patient who underwent urgent surgical resection of a large left atrial myxoma mimicking mitral stenosis. The postoperative course of the patient was uncomplicated. One year after surgery, the patient is asymptomatic and disease-free...
June 2017: Cardiology Research
https://www.readbyqxmd.com/read/28724907/measuring-the-olfactory-bulb-input-output-transformation-reveals-a-contribution-to-the-perception-of-odorant-concentration-invariance
#10
Douglas A Storace, Lawrence B Cohen
Humans and other animals can recognize an odorant as the same over a range of odorant concentrations. It remains unclear whether the olfactory bulb, the brain structure that mediates the first stage of olfactory information processing, participates in generating this perceptual concentration invariance. Olfactory bulb glomeruli are regions of neuropil that contain input and output processes: olfactory receptor neuron nerve terminals (input) and mitral/tufted cell apical dendrites (output). Differences between the input and output of a brain region define the function(s) carried out by that region...
July 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28724875/idarucizumab-a-quick-and-effective-antidote-administered-prior-to-coronary-artery-bypass-surgery-and-mitral-valve-plasty-in-the-case-of-a-patient-treated-with-dabigatran
#11
Andrzej J Sałacki, Tomasz Zapolski, Andrzej Wysokiński
No abstract text is available yet for this article.
July 18, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28724839/effect-of-recurrent-mitral-regurgitation-after-mitral-valve-repair-in-patients-with-degenerative-mitral-regurgitation
#12
Jung-Hwan Kim, Seung Hyun Lee, Hyun-Chel Joo, Young-Nam Youn, Kyung-Jong Yoo, Byung-Chul Chang, Sak Lee
BACKGROUND: This study investigated the consequences of recurrent mitral regurgitation (MR) after mitral valve (MV) repair in patients with degenerative MR and risk factors for recurrence.Methods and Results:From January 1990 to December 2015, 792 patients underwent MV repair due to degenerative MR. Recurrent MR was defined as moderate-to-severe MR on follow-up echocardiography. Mean follow-up duration was 8.71±5.58 years. During the follow-up period, MR recurred in 133 (16.8%) patients, and the MR recurrence-free rate at 20 years was 77...
July 20, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28724776/inhibitory-circuits-of-the-mammalian-main-olfactory-bulb
#13
Shawn D Burton
Synaptic inhibition critically influences sensory processing throughout the mammalian brain, including the main olfactory bulb (MOB), the first station of sensory processing in the olfactory system. Decades of research across numerous laboratories have established a central role for granule cells (GCs), the most abundant GABAergic interneuron type in the MOB, in the precise regulation of principal mitral and tufted cell (M/TC) firing rates and synchrony through lateral and recurrent inhibitory mechanisms. In addition to GCs, however, the MOB contains a vast diversity of other GABAergic interneuron types, and recent findings suggest that, while fewer in number, these oft-ignored interneurons are just as important as GCs in shaping odor-evoked M/TC activity...
July 19, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28724547/long-term-effects-of-a-renin-inhibitor-versus-a-thiazide-diuretic-on-arterial-stiffness-and-left-ventricular-diastolic-function-in-elderly-hypertensive-patients
#14
Yoshiyuki Okada, Shigeki Shibata, Naoki Fujimoto, Stuart Alexander Best, Benjamin D Levine, Qi Fu
Arterial stiffness and cardiac function are important predictors of cardiovascular events in patients with hypertension even with adequate blood pressure (BP) control. We evaluated whether a direct renin inhibitor, aliskiren, reduces arterial stiffness and modulates left ventricular function compared with a diuretic, hydrochlorothiazide, in elderly hypertensives. Twenty one hypertensives [67±14 (SD) yrs] were randomly assigned to receive 6-month aliskiren (n=11) or hydrochlorothiazide (n=10) based therapy...
July 19, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28724353/marfan-syndrome-and-cardiovascular-complications-results-of-a-family-investigation
#15
Simon Antoine Sarr, Siddikatou Djibrilla, Fatou Aw, Malick Bodian, Kana Babaka, Aliou Alassane Ngaidé, Momar Dioum, Serigne Abdou Ba
BACKGROUND: Cardiovascular complications in Marfan syndrome (MFS) make all its seriousness. Taking as a basis the Ghent criteria, we conducted a family screening from an index case. The objective was to describe the clinical characteristics of MFS anomalies and to detect cardiovascular complications in our patients. CASE PRESENTATION: Six subjects were evaluated. Patients had to be in the same uterine siblings of the index case or be a descendant. The objective was to search for MFS based on the diagnostic criteria of Ghent and, subsequently, detecting cardiovascular damage...
July 19, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28724192/handheld-echocardiography-during-hospitalization-for-acute-myocardial-infarction
#16
Michael W Cullen, Jeffrey B Geske, Nandan S Anavekar, J Wells Askew, Bradley R Lewis, Jae K Oh
BACKGROUND: Handheld echocardiography (HHE) is concordant with standard transthoracic echocardiography (TTE) in a variety of settings but has not been thoroughly compared to traditional TTE in patients with acute myocardial infarction (AMI). HYPOTHESIS: Completed by experienced operators, HHE provides accurate diagnostic capabilities compared with standard TTE in AMI patients. METHODS: This study prospectively enrolled patients admitted to the coronary care unit with AMI...
July 19, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28722185/valsalva-maneuver-exacerbates-left-atrial-compression-in-patients-with-large-hiatal-hernia
#17
Christopher Naoum, Leonard Kritharides, Sonali R Gnanenthiran, David Martin, Gregory L Falk, John Yiannikas
INTRODUCTION: Hiatal hernia (HH) can cause left atrial (LA) compression and impair LA filling. We evaluated the cardiac effects of preload reduction and abdominal strain induced by Valsalva maneuver (VM) in large HH patients. METHODS: LA and left ventricular (LV) dimensions were measured using 2D transthoracic echocardiography at rest and during VM in HH patients (n=55, 70±10 years) and controls (n=22, 67±6 years). Biplane LV volumes (n=39) and mitral inflow pulse-wave Doppler parameters (n=27) were also evaluated...
July 18, 2017: Echocardiography
https://www.readbyqxmd.com/read/28721493/modelling-of-lesions-associated-with-functional-mitral-regurgitation-in-an-ex-vivo-platform
#18
Michal Jaworek, Federico Lucherini, Claudia Romagnoni, Guido Gelpi, Monica Contino, Paolo Romitelli, Carlo Antona, Gianfranco B Fiore, Riccardo Vismara
Functional mitral regurgitation (FMR) is a complex pathology involving valvular and subvalvular structures reconfiguration, and its treatment is considered challenging. There is a lack of experimental models allowing for reliable preclinical FMR treatments' evaluation in a realistic setting. A novel approach to simulate FMR was developed and incorporated into an ex vivo passive beating heart platform. FMR was obtained by dilating the mitral annulus (MA) mainly in the antero-posterior direction and displacing the papillary muscles (PMs) apically and laterally by ad hoc designed and 3D printed dilation and displacing devices...
July 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28720600/is-the-mechanism-of-re-expansion-pulmonary-oedema-in-a-heart-lung-interaction
#19
Candy Masego Mokotedi, Martin Balik
The mechanism of re-expansion pulmonary oedema (Re-PE) is unclear. There are multiple variables in play when evaluating the response to evacuation of pleural fluid. We present an educational case of a critically ill patient admitted for respiratory failure who was fully dependent on ventricular pacing set at a constant rate throughout the episode of Re-PE. The transthoracic echocardiography (TTE) showed an ejection fraction of 38%, moderate mitral regurgitation (MR), mildly dilated right ventricle and moderate pulmonary hypertension...
July 18, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28720299/cats-with-diabetes-mellitus-have-diastolic-dysfunction-in-the-absence-of-structural-heart-disease
#20
N J Pereira, J Novo Matos, M Baron Toaldo, U Bartoszuk, N Summerfield, A Riederer, C Reusch, T M Glaus
Diabetes mellitus (DM) can result in cardiovascular dysfunction and heart failure characterized by diastolic dysfunction with or without the presence of systolic dysfunction in people and laboratory animals. The objective of this prospective study was to determine if cats with newly diagnosed DM had myocardial dysfunction and, if present, whether it would progress if appropriate antidiabetic therapy was commenced. Thirty-two diabetic cats were enrolled and received baseline echocardiographic examination; of these, 15 cats were re-examined after 6 months...
July 2017: Veterinary Journal
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