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Cardiac studies

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https://www.readbyqxmd.com/read/29141185/increased-cross-bridge-recruitment-contributes-to-transient-increase-in-force-generation-beyond-maximal-capacity-in-human-myocardium
#1
Nima Milani-Nejad, Jae-Hoon Chung, Benjamin D Canan, Vadim V Fedorov, Bryan A Whitson, Ahmet Kilic, Peter J Mohler, Paul M L Janssen
Cross-bridge attachment allows force generation to occur, and rate of tension redevelopment (ktr) is a commonly used index of cross-bridge cycling rate. Tension overshoots have been observed briefly after a slack-restretch ktr maneuver in various species of animal models and humans. In this study, we set out to determine the properties of these overshoots and their possible underlying mechanism. Utilizing human cardiac trabeculae, we have found that tension overshoots are temperature-dependent and that they do not occur at resting states...
November 12, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29141184/unrecognized-venous-injuries-after-cardiac-implantable-electronic-device-transvenous-lead-extraction
#2
Khaldoun G Tarakji, Walid Saliba, Danny Markabawi, E Rene Rodriguez, Yoaav Krauthammer, Michael P Brunner, Ayman A Hussein, Bryan Baranowski, Daniel J Cantillon, Mohamed Kanj, Mark Niebauer, Jack Rickard, Thomas Callahan, Mingyuan Shao, David O Martin, Oussama M Wazni, Bruce L Wilkoff, Carmela D Tan
BACKGROUND: Major complication rate of transvenous lead extraction (TLE) is estimated around 1-2.0%. Laceration of the central veins can be fatal. OBJECTIVES: to define the incidence and extent of venous injuries on a microscopic level after TLE and compare it with the incidence of clinically documented events of venous laceration. METHODS: We studied all patients who underwent TLE at our tertiary center within 30 months via a variety of techniques...
November 7, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29141175/sudden-cardiac-arrest-during-participation-in-competitive-sports
#3
Cameron H Landry, Katherine S Allan, Kim A Connelly, Kris Cunningham, Laurie J Morrison, Paul Dorian
BACKGROUND: The incidence of sudden cardiac arrest during participation in sports activities remains unknown. Preparticipation screening programs aimed at preventing sudden cardiac arrest during sports activities are thought to be able to identify at-risk athletes; however, the efficacy of these programs remains controversial. We sought to identify all sudden cardiac arrests that occurred during participation in sports activities within a specific region of Canada and to determine their causes...
November 16, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29141071/usefulness-of-total-12-lead-qrs-voltage-as-a-clue-to-diagnosis-of-patients-with-cardiac-sarcoidosis-severe-enough-to-warrant-orthotopic-heart-transplant
#4
William C Roberts, Tiffany M Becker, Shelley A Hall
Importance: Severe heart failure caused by cardiac sarcoidosis is difficult to diagnosis without biopsy. Objective: To assess whether total electrocardiographic 12-lead QRS voltage may be a clue to diagnosis. Design, Setting, Participants: Case-series study with cases collected at Baylor University Medical Center at Dallas, Dallas, Texas, from January 13, 2005, to January 24, 2017. The clinical records of 16 patients with severe heart failure caused by cardiac sarcoidosis were studied...
November 15, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/29140968/end-tidal-carbon-dioxide-use-for-tracheal-intubation-analysis-from-the-national-emergency-airway-registry-for-children-near4kids-registry
#5
Melissa L Langhan, Beth L Emerson, Sholeen Nett, Matthew Pinto, Ilana Harwayne-Gidansky, Kyle J Rehder, Conrad Krawiec, Keith Meyer, John S Giuliano, Erin B Owen, Keiko M Tarquinio, Ron C Sanders, Michael Shepherd, Gokul Kris Bysani, Asha N Shenoi, Natalie Napolitano, Sandeep Gangadharan, Simon J Parsons, Dennis W Simon, Vinay M Nadkarni, Akira Nishisaki
OBJECTIVE: Waveform capnography use has been incorporated into guidelines for the confirmation of tracheal intubation. We aim to describe the trend in waveform capnography use in emergency departments and PICUs and assess the association between waveform capnography use and adverse tracheal intubation-associated events. DESIGN: A multicenter retrospective cohort study. SETTING: Thirty-four hospitals (34 ICUs and nine emergency departments) in the National Emergency Airway Registry for Children quality improvement initiative...
November 14, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/29140967/near-infrared-spectroscopy-and-vascular-occlusion-test-for-predicting-clinical-outcome-in-pediatric-cardiac-patients-a-prospective-observational-study
#6
Ji-Hyun Lee, Young-Eun Jang, In-Kyung Song, Eun-Hee Kim, Hee-Soo Kim, Jin-Tae Kim
OBJECTIVES: This study is designed to determine the feasibility and utility of vascular occlusion test variables as measured by INVOS Medtronic, Dublin, Ireland) in pediatric cardiac patients. DESIGN: A prospective observational study. SETTING: A tertiary children's hospital. PATIENTS: Children less than or equal to 8 years old who were scheduled for elective cardiac surgery under cardiopulmonary bypass. INTERVENTIONS: A vascular occlusion test (3 min of ischemia and reperfusion) was performed on the calf at three time points: after induction of anesthesia (T0), during cardiopulmonary bypass (T1), and after sternal closure (T2)...
November 14, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/29140804/exploration-of-predictive-biomarkers-for-sudden-unexplained-cardiac-death-in-nonelderly-people-a-case-control-study-with-biochemical-parameters-related-to-heart-failure
#7
Sakai Kentaro, Iwadate Kimiharu, Matsumoto Sari, Takasu Shojiro, Kanto Yuko
Sudden unexplained cardiac death (SUCD) can occasionally occur in nonelderly patients with epilepsy, psychiatric disorders, or no medical history. This study was conducted to aim to analyze whether values of the biomarkers for heart failure are associated with the SUCD. Serum concentrations of N-terminal probrain natriuretic peptide, high-sensitivity C-reactive protein (hs-CRP), and tumor necrosis factor α were analyzed in 57 nonelderly patients with SUCD who was diagnosed at medicolegal autopsy. The subjects were divided into 3 subgroups according to the medical history: (1) epilepsy, (2) psychiatric disorders, and (3) no specific medical history...
November 15, 2017: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/29140803/use-of-postmortem-computed-tomography-to-detect-bowel-obstruction-and-its-relationship-to-the-cause-of-death
#8
Dominic Gascho, Sarah Schaerli, Lucile Tuchtan-Torrents, Michael J Thali, Guillaume Gorincour
Bowel distension frequently indicates bowel obstruction, which is a common diagnosis in clinical radiology. Typically, symptoms and complaints lead to radiological examinations and the detection of the etiology. Untreated intestinal obstructions can lead to a fatal outcome through cardiac failure due to septic shock. Certain of these cases undergo medicolegal investigations depending on the case history, the condition of the decedent, the location of the finding, or recent visits to medical professionals. Computed tomography (CT) is a recommended method in clinical radiology for the detection of bowel obstruction, which is indicated by bowel distension and further radiological signs (eg, the whirl sign, which indicates a volvulus)...
November 15, 2017: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/29140571/is-overactive-bladder-microvasculature-disease-a-component-of-systemic-atheroscleorosis
#9
Ahmet Ozgur Yeniel, Ahmet Mete Ergenoglu, Reci Meseri, Erkan Kismali, Anıl Ari, Gulgun Kavukcu, Hikmet H Aydin, Handan Ak, Sevcan Atay, Ismail Mete Itil
AIMS: To evaluate the relationship between overactive bladder (OAB) and systemic atherosclerosis in a cohort of women. METHODS: In this case-control study, we assessed atherosclerosis indicators, such as Framingham risk scores and carotid and femoral artery intima-media thickness, and evaluated possible bladder wall responses to atherosclerosis using endovaginal color Doppler ultrasound and the detection of urinary cytokines in women with OAB and in controls. Quantitative assessment of blood perfusion at the bladder neck was performed using a method that allows for the dynamic monitoring of flow in a predefined region of interest at every point of the cardiac cycle...
November 15, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29140557/withdrawn-pharmacological-cardioversion-for-atrial-fibrillation-and-flutter
#10
REVIEW
John Cordina, Gillian E Mead
BACKGROUND: Atrial fibrillation is the commonest cardiac dysrhythmia. It is associated with significant morbidity and mortality. There are two approaches to the management of atrial fibrillation: controlling the ventricular rate or converting to sinus rhythm in the expectation that this would abolish its adverse effects. OBJECTIVES: To assess the effects of pharmacological cardioversion of atrial fibrillation in adults on the annual risk of stroke, peripheral embolism, and mortality...
November 15, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29140427/sudden-unexpected-cardiac-death-on-monday-in-younger-and-older-men-the-manitoba-follow-up-study
#11
Robert B Tate, Philip D St John
No abstract text is available yet for this article.
November 13, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29140312/plasma-amino-acid-abnormalities-in-chronic-heart-failure-mechanisms-potential-risks-and-targets-in-human-myocardium-metabolism
#12
Roberto Aquilani, Maria Teresa La Rovere, Daniela Corbellini, Evasio Pasini, Manuela Verri, Annalisa Barbieri, Anna Maria Condino, Federica Boschi
The goal of this study was to measure arterial amino acid levels in patients with chronic heart failure (CHF), and relate them to left ventricular function and disease severity. Amino acids (AAs) play a crucial role for heart protein-energy metabolism. In heart failure, arterial AAs, which are the major determinant of AA uptake by the myocardium, are rarely measured. Forty-one subjects with clinically stable CHF (New York Heart Association (NYHA) class II to IV) were analyzed. After overnight fasting, blood samples from the radial artery were taken to measure AA concentrations...
November 15, 2017: Nutrients
https://www.readbyqxmd.com/read/29139550/long-term-clinical-and-echocardiographic-outcomes-of-mitraclip-therapy-in-patients-non-responders-to-cardiac-resynchronization
#13
Valerio L Giaimo, Paolo Zappulla, Arianna Cirasa, Donatella Tempio, Maria Sanfilippo, Giulia Rapisarda, Danilo Trovato, Angelo Di Grazia, Claudio Liotta, Carmelo Grasso, Davide Capodanno, Corrado Tamburino, Valeria Calvi
OBJECTIVES: This study deals clinical and echocardiographic outcomes in cardiac resynchronization therapy (CRT) non-responders patients undergoing Mitraclip procedure. BACKGROUND: Functional mitral regurgitation (FMR) occurs in approximately one-third of heart failure (HF) patients. Resynchronization therapy may correct FMR in patients with HF, however significant FMR persists in 20-25% of CRT patients. METHODS: All patients included were previously treated with CRT for at least 6 months and remained classified as New York Heart Association (NYHA) functional class III or IV despite optimal medical therapy; the echocardiographic assessment showed lack of decrease of the left ventricular end systolic volume (LVESV) of at least 10% and residual moderate-to-severe or severe FMR...
November 15, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29139189/clostridium-difficile-infection-in-hospitalized-octogenarian-patients
#14
Anca Trifan, Irina Girleanu, Carol Stanciu, Egidia Miftode, Camelia Cojocariu, Ana-Maria Singeap, Catalin Sfarti, Stefan Chiriac, Tudor Cuciureanu, Oana Stoica
AIM: To evaluate the risk factors and outcome of Clostridium difficile infection in hospitalized octogenarian patients. METHODS: A retrospective analysis of risk factors and outcome of C. difficile infection in hospitalized octogenarians was carried out at two academic centers in Romania from January 2014 to September 2016. Demographic, clinical and laboratory characteristics; antibiotics and proton pump inhibitors use in-hospital and 2 months before admission; comorbidities; length of hospital stay; treatment; and outcome were carefully collected from the patients' medical charts and compared with those from octogenarians hospitalized during the same period...
November 15, 2017: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/29139034/vessel-centerline-reconstruction-from-non-isocentric-and-non-orthogonal-paired-monoplane-angiographic-images
#15
Mie Kunio, Caroline C O'Brien, Augusto C Lopes, Lynn Bailey, Pedro A Lemos, Guillermo J Tearney, Elazer R Edelman
PURPOSE: Three-dimensional reconstruction of a vessel centerline from paired planar coronary angiographic images is critical to reconstruct the complex three-dimensional structure of the coronary artery lumen and the relative positioning of implanted devices. In this study, a new vessel centerline reconstruction method that can utilize non-isocentric and non-orthogonal pairs of angiographic images was developed and tested. METHODS: Our new method was developed in in vitro phantom models of bifurcated coronary artery with and without stent, and then tested in in vivo swine models (twelve coronary arteries)...
November 14, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29139013/engineering-analysis-of-tricuspid-annular-dynamics-in-the-beating-ovine-heart
#16
Manuel K Rausch, Marcin Malinowski, Penny Wilton, Asghar Khaghani, Tomasz A Timek
Functional tricuspid regurgitation is a significant source of morbidity and mortality in the US. Furthermore, treatment of functional tricuspid regurgitation is suboptimal with significant recurrence rates, which may, at least in part, be due to our limited knowledge of the relationship between valvular shape and function. Here we study the dynamics of the healthy in vivo ovine tricuspid annulus to improve our understanding of normal annular deformations throughout the cardiac cycle. To this end, we determine both clinical as well as engineering metrics of in vivo annular dynamics based on sonomicrometry crystals surgically attached to the annulus...
November 14, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29138974/medical-complications-and-mortality-in-octogenarians-undergoing-elective-spinal-fusion-surgeries
#17
Sharad Rajpal, E Lee Nelson, Alan T Villavicencio, Jayratna Telang, Roshan Kantha, Kara Beasley, Sigita Burneikiene
BACKGROUND: The consequences of suffering postoperative complications in elderly undergoing spinal surgeries may be different compared to younger patients. The primary objective of this study was to identify the types and frequency of medical complications and mortality rates in patients 80 years of age or older undergoing elective spinal fusion surgeries for degenerative spinal disease. METHODS: A prospective observational study with a retrospective chart review was performed, which included all consecutive patients ≥80 years old undergoing elective spinal fusion surgeries from May 2012 to August 2015...
November 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29138937/effects-of-propofol-sedation-on-pacing-thresholds-results-from-an-observational-cohort-study
#18
Jakob Lüker, Arian Sultan, Tobias Plenge, Samuel Lee, Jan-Hendrik van den Bruck, Daniel Steven
BACKGROUND: Propofol is one of the most commonly used intravenous anaesthetic drugs for surgical procedures. The use of propofol for sedation is also common practice during endoscopic procedures, electrophysiology studies, and ablation procedures, as well as pacemaker and defibrillator implantation. It was found that propofol alters the electrophysiologic properties of the heart and its conduction system. The effects of propofol on pacing thresholds are unknown and could have implications for pacemaker (PM) and defibrillator (ICD) implantation procedures, as well as sedation and anaesthesia in PM and ICD patients in general...
November 14, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/29138878/higher-cost-of-hospitalizations-for-non-cardiac-diagnoses-in-adults-with-congenital-heart-disease
#19
Michael D Seckeler, Ian D Thomas, Jennifer Andrews, Omar Meziab, Tabitha Moe, Elissa Heller, Scott E Klewer
Adults with congenital heart disease (CHD) are a rapidly increasing population and their impact on healthcare resources is not fully understood. The purpose of this study was to describe the costs of hospitalizations for non-cardiac disease for adults with CHD. We conducted a retrospective review of hospital discharge data from the University HealthSystem Consortium Clinical Data Base/Resource Manager from January 2011 through December 2013. Patients were ≥ 18 years old at admission with any ICD-9 code for moderate or high severity CHD; cardiac surgical admissions were excluded...
November 15, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/29138860/an-rna%C3%A2-sequencing-study-identifies-candidate-genes-for-angiotensin-ii%C3%A2-induced-cardiac-remodeling
#20
Jin Shu, Zhanwen Liu, Li Jin, Haiya Wang
The present study aimed to reveal the underlying mechanism of angiotensin II (AngII)‑induced cardiac remodeling and to identify potential therapeutic targets for prevention. Rat cardiac fibroblasts (CFs) were cultured with 10 nM AngII for 12 h, and CFs without AngII were used as the control. Following RNA isolation from AngII treated and control CFs, RNA‑sequencing was performed to detect gene expression levels. Differentially‑expressed genes (DEGs) were identified using the linear models for microarray analysis package in R software, and their functions and pathways were examined via enrichment analysis...
November 14, 2017: Molecular Medicine Reports
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