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Matthew Williams cardiac

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https://www.readbyqxmd.com/read/28196898/increased-radial-access-is-not-associated-with-worse-femoral-outcomes-for-percutaneous-coronary-intervention-in-the-united-kingdom
#1
William Hulme, Matthew Sperrin, Evangelos Kontopantelis, Karim Ratib, Peter Ludman, Alex Sirker, Tim Kinnaird, Nick Curzen, Chun Shing Kwok, Mark De Belder, James Nolan, Mamas A Mamas
BACKGROUND: The radial artery is increasingly adopted as the primary access site for cardiac catheterization because of patient preference, lower bleeding rates, cost effectiveness, and reduced risk of mortality in high-risk patient groups. Concerns have been expressed that operators/centers have become increasingly unfamiliar with transfemoral access. The aim of this study was to assess whether a change in access site practice toward transradial access nationally has led to worse outcomes in percutaneous coronary intervention procedures performed through the transfemoral access approach...
February 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28185360/effect-of-environmental-impedance-surrounding-a-radiofrequency-ablation-catheter-electrode-on-lesion-characteristics
#2
Duy T Nguyen, Kianna Nguyen, Lijun Zheng, Joseph Schuller, Matthew Zipse, Wendy S Tzou, William H Sauer
INTRODUCTION: The electrical conductivity of the environment surrounding a catheter electrode may affect radiofrequency (RF) current. A higher impedance environment enveloping a catheter tip can be insulating and thus direct RF preferentially into targeted cardiac tissue. We sought to evaluate whether different environmental impedances will affect RF lesions. METHODS: An ex vivo model using bovine myocardium, load cell, and 4 mm ablation catheter was tested using a circulating bath of normal (0...
February 10, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28119465/phosphorylation-of-ser1928-mediates-the-enhanced-activity-of-the-l-type-ca2-channel-cav1-2-by-the-%C3%AE-2-adrenergic-receptor-in-neurons
#3
Hai Qian, Tommaso Patriarchi, Jennifer L Price, Lucas Matt, Boram Lee, Madeline Nieves-Cintrón, Olivia R Buonarati, Dhrubajyoti Chowdhury, Evanthia Nanou, Matthew A Nystoriak, William A Catterall, Montatip Poomvanicha, Franz Hofmann, Manuel F Navedo, Johannes W Hell
The L-type Ca(2+) channel Cav1.2 controls multiple functions throughout the body including heart rate and neuronal excitability. It is a key mediator of fight-or-flight stress responses triggered by a signaling pathway involving β-adrenergic receptors (βARs), cyclic adenosine monophosphate (cAMP), and protein kinase A (PKA). PKA readily phosphorylates Ser(1928) in Cav1.2 in vitro and in vivo, including in rodents and humans. However, S1928A knock-in (KI) mice have normal PKA-mediated L-type channel regulation in the heart, indicating that Ser(1928) is not required for regulation of cardiac Cav1...
January 24, 2017: Science Signaling
https://www.readbyqxmd.com/read/28052152/types-of-myocardial-infarction-among-human-immunodeficiency-virus-infected-individuals-in-the-united-states
#4
Heidi M Crane, Pathmaja Paramsothy, Daniel R Drozd, Robin M Nance, J A Chris Delaney, Susan R Heckbert, Matthew J Budoff, Greer A Burkholder, James H Willig, Michael J Mugavero, William C Mathews, Paul K Crane, Richard D Moore, Joseph J Eron, Sonia Napravnik, Peter W Hunt, Elvin Geng, Priscilla Hsue, Carla Rodriguez, Inga Peter, Greg S Barnes, Justin McReynolds, William B Lober, Kristina Crothers, Mathew Feinstein, Carl Grunfeld, Michael S Saag, Mari M Kitahata
Importance: The Second Universal Definition of Myocardial Infarction (MI) divides MIs into different types. Type 1 MIs result spontaneously from instability of atherosclerotic plaque, whereas type 2 MIs occur in the setting of a mismatch between oxygen demand and supply, as with severe hypotension. Type 2 MIs are uncommon in the general population, but their frequency in human immunodeficiency virus (HIV)-infected individuals is unknown. Objectives: To characterize MIs, including type; identify causes of type 2 MIs; and compare demographic and clinical characteristics among HIV-infected individuals with type 1 vs type 2 MIs...
January 4, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28043466/increasing-complexity-of-heart-transplantation-in-patients-with-congenital-heart-disease
#5
William Y Shi, Pankaj Saxena, Matthew S Yong, Silvana F Marasco, David C McGiffin, Anne Shipp, Robert G Weintraub, Yves d'Udekem, Christian P Brizard, Igor E Konstantinov
Owing to improved surgical results, there is a growing population of patients with repaired congenital heart disease (CHD) requiring heart transplantation. The objective of the study was to review our experience in these patients. A retrospective review of the outcomes of heart transplantation in patients with CHD (n = 77) between 1988 and 2014 was performed. Outcomes of early (1988-1999) and late (2000-2014) eras were compared. In results, the mean age was 18 ± 14 years (range: 16 days-58 years). Seventy (91%) patients underwent a mean of 2...
July 2016: Seminars in Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28039604/socioeconomic-and-racial-disparities-a-case-control-study-of-patients-receiving-transcatheter-aortic-valve-replacement-for-severe-aortic-stenosis
#6
Anna Sleder, Shiloh Tackett, Matthew Cerasale, Chetan Mittal, Iyad Isseh, Ryhm Radjef, Andrew Taylor, Rashad Farha, Oleksandra Lupak, Dana Larkin, Lois Lamerato, George Divine, Kimberlydawn Wisdom, Kimberly Baker-Genaw, William O'Neill
BACKGROUND: We sought to quantify socioeconomic disparities in patients with severe aortic stenosis (AS) undergoing transcatheter aortic valve replacement (TAVR) at an urban, tertiary referral center. METHODS: This retrospective case-control study identified 67 patients with severe AS (aortic valve [AV] area ≤1 cm(2) or AV area index ≤0.60 cm(2)/m(2) or AV velocity ≥40 mmHg) who underwent TAVR from November 5, 2013 to June 10, 2014. Study subjects were matched to controls with severe AS without TAVR in a 4:1 age-frequency match...
December 30, 2016: Journal of Racial and Ethnic Health Disparities
https://www.readbyqxmd.com/read/28025066/executive-summary-trends-in-u-s-cardiovascular-care-2016-report-from-4-acc-national-cardiovascular-data-registries
#7
Frederick A Masoudi, Angelo Ponirakis, James A de Lemos, James G Jollis, Mark Kremers, John C Messenger, John W M Moore, Issam Moussa, William J Oetgen, Paul D Varosy, Robert N Vincent, Jessica Wei, Jeptha P Curtis, Matthew T Roe, John A Spertus
The National Cardiovascular Data Registries (NCDR) of the American College of Cardiology consists of ten national programs designed to measure quality of care for high impact cardiovascular conditions and procedures. The NCDR provides feedback with benchmarking of a broad range of quality metrics to participants; supports quality improvement interventions at the local and national level; and serves as the basis for cardiovascular health services and epidemiology research that informs contemporary clinical care...
December 20, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28025065/trends-in-u-s-cardiovascular-care-2016-report-from-4-acc-national-cardiovascular-data-registries
#8
REVIEW
Frederick A Masoudi, Angelo Ponirakis, James A de Lemos, James G Jollis, Mark Kremers, John C Messenger, John W M Moore, Issam Moussa, William J Oetgen, Paul D Varosy, Robert N Vincent, Jessica Wei, Jeptha P Curtis, Matthew T Roe, John A Spertus
Cardiovascular disease (CVD) is a leading cause of death and disability in the United States. National quality programs such as the National Cardiovascular Data Registry (NCDR®) permit assessments of the quality of care and outcomes for broad populations of patients with CVD. This report provides data from 2014 from four NCDR® hospital quality programs: 1) CathPCI® for coronary angiography and percutaneous coronary intervention (667,424 procedures performed in 1,612 hospitals) ICD™ for implantable cardioverter defibrillators (158,649 procedures performed in 1,715 hospitals); 3) ACTION®-GWTG™ for acute coronary syndromes (182,903 patients admitted to 907 hospitals); and 4) IMPACT® for cardiac catheterization and intervention for pediatric and adult congenital heart disease (20,169 procedures in 76 hospitals)...
December 20, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28000961/adiabatic-excitation-for-31-p-mr-spectroscopy-in-the-human-heart-at-7-t-a-feasibility-study
#9
Ladislav Valkovič, William T Clarke, Lucian A B Purvis, Benoit Schaller, Matthew D Robson, Christopher T Rodgers
PURPOSE: Phosphorus magnetic resonance spectroscopy ((31) P-MRS) provides a unique tool for assessing cardiac energy metabolism, often quantified using the phosphocreatine (PCr)/adenosine triphosphate (ATP) ratio. Surface coils are typically used for excitation for (31) P-MRS, but they create an inhomogeneous excitation field across the myocardium, producing undesirable, spatially varying partial saturation. Therefore, we implemented adiabatic excitation in a 3D chemical shift imaging (CSI) sequence for cardiac (31) P-MRS at 7 Tesla (T)...
December 21, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27990700/biomass-fuel-smoke-exposure-was-associated-with-adverse-cardiac-remodeling-and-left-ventricular-dysfunction-in-peru
#10
Melissa S Burroughs Peña, Eric J Velazquez, Jose D Rivera, Fawaz Alenezi, Catherine Wong, Matthew Grigsby, Victor G Davila-Roman, Robert H Gilman, Jaime J Miranda, William Checkley
BACKGROUND: While household air pollution from biomass fuel combustion has been linked to cardiovascular disease, the effects on cardiac structure and function have not been well described. We sought to determine the association between biomass fuel smoke exposure and cardiac structure and function by transthoracic echocardiography. METHODS: We identified a random sample of urban and rural residents living in the high-altitude region of Puno, Peru. Daily biomass fuel use was self-reported...
December 19, 2016: Indoor Air
https://www.readbyqxmd.com/read/27926646/treatment-of-a-pregnant-patient-in-a-persistent-vegetative-state
#11
Matthew P Romagano, William E Scorza, Stephen E Lammers, Carole Dorr, John C Smulian
BACKGROUND: Brain injury leading to a persistent vegetative state during pregnancy involves difficult medical and ethical decisions. CASE: A 21-year-old multigravid woman entered a persistent vegetative state at 20 1/7 weeks of gestation after cardiac arrest with postanoxic brain injury from a suspected drug overdose. The clinical disciplines responsible for her case formed a collaborative care plan involving ventilator, nutrition, and medication support of the mother and regular fetal monitoring and ultrasound testing...
January 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/27904163/the-impact-of-direct-cardiac-output-determination-on-using-a-widely-available-direct-continuous-oxygen-consumption-measuring-device-on-the-hemodynamic-assessment-of-aortic-valve
#12
Zaher Fanari, Matthew Grove, Anitha Rajamanickam, Sumaya Hammami, Cassie Walls, Paul Kolm, Mitchell Saltzberg, William S Weintraub, Andrew J Doorey
BACKGROUND: Accurate assessment of cardiac output (CO) is essential for the hemodynamic assessment of aortic valve area (AVA). Estimation of oxygen consumption (VO2) and Thermodilution (TD) is employed in many cardiac catheterization laboratories (CCL) given the historically cumbersome nature of direct continuous VO2 measurement, the "gold standard" for this technique. A portable facemask device simplifies the direct continuous measurement of VO2, allowing for relatively rapid and continuous assessment of CO and AVA...
September 2016: Delaware Medical Journal
https://www.readbyqxmd.com/read/27888672/incidence-of-coronary-intervention-in-cardiac-arrest-survivors-with-non-shockable-initial-rhythms-and-no-evidence-of-st-elevation-mi-stemi
#13
Matthew Wilson, Anne V Grossestreuer, David F Gaieski, Benjamin S Abella, William Frohna, Munish Goyal
OBJECTIVE: With the demonstrated benefit of an early-invasive strategy for STEMI and VF/VT arrest patients, there is interest in assessing the potential benefit of early angiography for non-shockable (PEA/Asystole) arrest patients. We hypothesized that in cardiac arrest patients who obtain return of spontaneous circulation (ROSC) after a non-shockable initial rhythm and do not have STEMI the incidence of coronary intervention would be clinically insignificant (<5%). METHODS: Retrospective multicenter US clinical registry study of post-cardiac arrest patients at 18 hospitals between 1/00 and 5/14...
November 23, 2016: Resuscitation
https://www.readbyqxmd.com/read/27836871/patient-safety-events-in-out-of-hospital-paediatric-airway-management-a-medical-record-review-by-the-csi-ems
#14
Matthew Hansen, Garth Meckler, William Lambert, Caitlin Dickinson, Kathryn Dickinson, Joshua Van Otterloo, Jeanne-Marie Guise
OBJECTIVE: To describe the frequency and characterise the nature of patient safety events in paediatric out-of-hospital airway management. METHODS: We conducted a retrospective cross-sectional medical record review of all 'lights and sirens' emergency medicine services transports from 2008 to 2011 in patients <18 years of age in the Portland Oregon metropolitan area. A chart review tool (see online supplementary appendix) was adapted from landmark patient safety studies and revised after pilot testing...
November 11, 2016: BMJ Open
https://www.readbyqxmd.com/read/27659885/the-effect-of-high-risk-st-elevation-myocardial-infarction-transfer-patients-on-risk-adjusted-in-hospital-mortality-a-report-from-the-american-heart-association-mission-lifeline-program
#15
Michael C Kontos, Tracy Y Wang, Anita Y Chen, Eric R Bates, Harold L Dauerman, Timothy D Henry, Steven V Manoukian, Matthew T Roe, Robert Suter, Laine Thomas, William J French
BACKGROUND: Hospital mortality is an important quality measure for acute myocardial infarction care. There is a concern that despite risk adjustment, percutaneous coronary intervention hospitals accepting a greater volume of high-risk ST elevation myocardial infarction (STEMI) transfer patients may have their reported mortality rates adversely affected. METHODS: The STEMI patients in the National Cardiovascular Data RegistryAcute Coronary Treatment Intervention Outcomes Network Registry-Get With the Guidelines from April 2011 to December 2013 were included...
October 2016: American Heart Journal
https://www.readbyqxmd.com/read/27645989/a-novel-method-for-epicardial-defibrillator-lead-placement-in-young-children-coil-between-the-great-arteries
#16
Raghav Murthy, Matthew R Williams, James C Perry, Suzanne Shepard, Daniel DiBardino
The primary and secondary prevention of sudden cardiac death resulting from malignant arrhythmia, channelopathy, and hypertrophic cardiomyopathy often requires the implantation of automatic internal cardiac defibrillators (AICDs) in the pediatric population. In young patients, the small size of the systemic veins, complex anatomy of congenital heart disease, and body habitus often preclude safe and durable transvenous placement of the AICD coil, requiring innovative methods to circumvent this problem. This report describes the technique used at Rady Children's Hospital San Diego/UCSD for the epicardial placement of an ICD system with a transvenous ICD coil placed between the aorta and pulmonary artery, thereby producing a stable location and excellent coil-to-can vector for successful defibrillation...
October 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27644061/pausing-with-the-gauze-inhibition-of-temporary-pacemakers-by-radiofrequency-scan-during-cardiac-surgery
#17
Matthew R Williams, Douglas B Atkinson, Vassilios J Bezzerides, Yuki Koichi, Kathryn Franklin, Alfonso Casta, Mark E Alexander
BACKGROUND: Radiofrequency identification (RFID) detection systems are used to detect retained surgical sponges and may cause electromagnetic interference (EMI), altering intended function of cardiac pacing systems. Three pediatric patients requiring temporary pacing for postoperative atrioventricular block experienced transient inhibition of ventricular pacing during the use of RFID detection system. Bench testing was performed to evaluate the mechanism of pacemaker inhibition. METHODS: Impedance of temporary pacing wires was obtained using a pacing system analyzer...
September 16, 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27579776/bi-layered-polyurethane-extracellular-matrix-cardiac-patch-improves-ischemic-ventricular-wall-remodeling-in-a-rat-model
#18
Antonio D'Amore, Tomo Yoshizumi, Samuel K Luketich, Matthew T Wolf, Xinzhu Gu, Marcello Cammarata, Richard Hoff, Stephen F Badylak, William R Wagner
As an intervention to abrogate ischemic cardiomyopathy, the concept of applying a temporary, local patch to the surface of the recently infarcted ventricle has been explored from a number of design perspectives. Two important features considered for such a cardiac patch include the provision of appropriate mechanical support and the capacity to influence the remodeling pathway by providing cellular or biomolecule delivery. The objective of this report was to focus on these two features by first evaluating the incorporation of a cardiac extracellular matrix (ECM) component, and second by evaluating the impact of patch anisotropy on the pathological remodeling process initiated by myocardial infarction...
November 2016: Biomaterials
https://www.readbyqxmd.com/read/27516706/robust-spatio-temporal-registration-of-4d-cardiac-ultrasound-sequences
#19
Jørn Bersvendsen, Matthew Toews, Adriyana Danudibroto, William M Wells, Stig Urheim, Raúl San José Estépar, Eigil Samset
Registration of multiple 3D ultrasound sectors in order to provide an extended field of view is important for the appreciation of larger anatomical structures at high spatial and temporal resolution. In this paper, we present a method for fully automatic spatio-temporal registration between two partially overlapping 3D ultrasound sequences. The temporal alignment is solved by aligning the normalized cross correlation-over-time curves of the sequences. For the spatial alignment, corresponding 3D Scale Invariant Feature Transform (SIFT) features are extracted from all frames of both sequences independently of the temporal alignment...
February 27, 2016: Proceedings of SPIE
https://www.readbyqxmd.com/read/27515327/coronary-physiology-during-exercise-and-vasodilation-in-the-healthy-heart-and-in-severe-aortic-stenosis
#20
Matthew Lumley, Rupert Williams, Kaleab N Asrress, Satpal Arri, Natalia Briceno, Howard Ellis, Ronak Rajani, Maria Siebes, Jan J Piek, Brian Clapp, Simon R Redwood, Michael S Marber, John B Chambers, Divaka Perera
BACKGROUND: Severe aortic stenosis (AS) can manifest as exertional angina even in the presence of unobstructed coronary arteries. OBJECTIVES: The authors describe coronary physiological changes during exercise and hyperemia in the healthy heart and in patients with severe AS. METHODS: Simultaneous intracoronary pressure and flow velocity recordings were made in unobstructed coronary arteries of 22 patients with severe AS (mean effective orifice area 0...
August 16, 2016: Journal of the American College of Cardiology
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