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https://www.readbyqxmd.com/read/28916172/biometric-verification-by-cross-correlation-analysis-of-12-lead-ecg-patterns-ranking-of-the-most-reliable-peripheral-and-chest-leads
#1
Vessela Krasteva, Irena Jekova, Roger Abächerli
BACKGROUND: Electrocardiogram (ECG)-based biometrics relies on the most stable and unique beat patterns, i.e. those with maximal intra-subject and minimal inter-subject waveform differences seen from different leads. We investigated methodology to evaluate those differences, aiming to rank the most prominent single and multi-lead ECG sets for biometric verification across a large population. METHODS: A clinical standard 12-lead resting ECG database, including 460 pairs of remote recordings (distanced 1year apart) was used...
August 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28901670/specificity-of-wide-qrs-complex-tachycardia-criteria-and-algorithms-in-patients-with-ventricular-preexcitation
#2
Marek Jastrzębski, Paweł Moskal, Piotr Kukla, Kamil Fijorek, Roksana Kisiel, Danuta Czarnecka
BACKGROUND: Despite substantial progress in the field of differentiation between ventricular tachycardia (VT) and supraventricular tachycardia (SVT) with wide QRS complexes, differentiation between VT and preexcited SVT remains largely unresolved due to significant overlap in QRS morphology. Our aim was to assess the specificities of various single ECG criteria and sets of criteria (Brugada algorithm, aVR algorithm, Steurer algorithm, and the VT score) for diagnosis of VT in a sizable cohort of patients with preexcitation...
September 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28899954/differentiating-the-qrs-morphology-of-posterior-fascicular-ventricular-tachycardia-from-right-bundle-branch-block-and-left-anterior-hemiblock-aberrancy
#3
Yoav Michowitz, Oholi Tovia-Brodie, Ishai Heusler, Avi Sabbag, Michael Rahkovich, Hezzy Shmueli, Aharon Glick, Bernard Belhassen
BACKGROUND: Left posterior fascicular ventricular tachycardia (LPF-VT) is frequently misdiagnosed as supraventricular tachycardia with aberrant right bundle branch block (RBBB) and left anterior hemiblock (LAHB). The purpose of the present study was to define the morphological ECG characteristics of LPF-VT and attempt to differentiate it from RBBB and LAHB aberrancy. METHODS AND RESULTS: A systematic Medline search was used to identify or locate ECG tracings from patients with LPF-VTs...
September 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28895061/valvular-heart-disease-in-women-differential-remodeling-and-response-to-new-therapies
#4
REVIEW
Jaya Chandrasekhar, George Dangas, Roxana Mehran
In the United States, valvular heart disease (VHD) has a prevalence of 2.5%, most commonly presenting as aortic stenosis (AS) or mitral valve regurgitation (MR) and increasingly observed to be of a degenerative etiology. Women frequently have latent symptoms despite significant disease, and it is therefore pertinent to consider both clinical symptoms and imaging findings for decision-making on treatment. Indeed, significant advances have been made in noninvasive imaging allowing for more accurate diagnosis and disease prognostication...
September 11, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28893433/effects-of-remote-ischemic-preconditioning-in-patients-with-concentric-myocardial-hypertrophy-a-randomized-controlled-trial-with-molecular-insights
#5
Young Song, Jong Wook Song, Sak Lee, Ji-Hae Jun, Young-Lan Kwak, Jae-Kwang Shim
BACKGROUND: Efficacy of remote ischemic preconditioning (RIPC) for cardioprotection in cardiac surgery is controversial. We aimed to evaluate the clinical and molecular effects of RIPC on the concentrically hypertrophied myocardium. METHODS: Seventy-two aortic stenosis patients receiving aortic valve replacement (AVR) under sevoflurane anesthesia were randomly allocated to RIPC (3cycles of 5-min inflation [300mmHg] and deflation on the left arm) or control (deflated cuff placement) group...
September 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28890466/changes-in-aortic-pulse-wave-velocity-and-the-predictors-of-improvement-in-arterial-stiffness-following-aortic-valve-replacement
#6
Emir Cantürk, Beytullah Çakal, Oğuz Karaca, Onur Omaygenç, Salih Salihi, Arda Özyüksel, Atıf Akçevin
BACKGROUND: The interaction between valvular aortic stenosis (AS) and arterial stiffness, as well as the impact of aortic valve replacement (AVR) on arterial stiffness, remains unclear. In this study, we aimed to evaluate the degree of AS severity on non-invasive pulse wave velocity (PWV) measurements. We also searched whether the AVR procedure favorably affects PWV. METHODS: In all, 38 patients undergoing AVR for chronic AS were included. The degree of aortic stiffness was measured with PWV at both baseline and 6 months after AVR...
September 8, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28885088/progression-of-trunk-imbalance-in-adolescent-idiopathic-scoliosis-with-a-thoracolumbar-lumbar-curve-is-it-predictable-at-the-initial-visit
#7
Chang Ju Hwang, Choon Sung Lee, Dong-Ho Lee, Jae Hwan Cho
OBJECTIVE Progression of trunk imbalance is an important finding during follow-up of patients with adolescent idiopathic scoliosis (AIS). Nevertheless, no factors that predict progression of trunk imbalance have been identified. The purpose of this study was to identify parameters that predict progression of trunk imbalance in cases of AIS with a structural thoracolumbar/lumbar (TL/L) curve. METHODS This study included 105 patients with AIS and a structural TL/L curve who were followed up at an outpatient clinic...
September 8, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28882333/trends-and-outcomes-of-aortic-valve-replacement-in-patients-with-end-stage-renal-disease-on-hemodialysis
#8
Sami Aljohani, Fahad Alqahtani, Ahmad Almustafa, Khaled Boobes, Sujal Modi, Mohamad Alkhouli
Hemodialysis (HD) patients with aortic stenosis are less likely to undergo aortic valve replacement (AVR) due to their excess perioperative mortality. We aimed to evaluate contemporary utilization and outcomes of combined and isolated AVR in HD patients. The Nationwide Inpatient Sample was used to identify 142,046 patients who underwent AVR in 2005 to 2014, of whom 2,264 (1.6%) were on HD. Crude and adjusted in-hospital outcomes and costs were assessed in unmatched and propensity-matched cohorts of HD and non-HD patients, respectively...
August 4, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28882144/sutureless-aortic-valve-replacement-in-a-calcified-homograft-combined-with-mitral-valve-replacement
#9
Ferdi Akca, Kayan Lam, Ibrahim Özdemir, Erwin Tan
BACKGROUND: Aortic valve replacement in a patient with an aortic homograft can be very challenging, especially when concomitant mitral valve surgery needs to be performed. CASE PRESENTATION: We report a case of implantation of a sutureless aortic valve bioprosthesis combined with mitral valve replacement in a patient with a severely calcified aortic homograft where conventional valve replacement was technically unfeasible. CONCLUSIONS: We believe that sutureless AVR is a viable option especially for young patients with a high surgical risk where conventional valve replacement cannot be achieved...
September 7, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28864136/severe-aortic-stenosis-patients-with-preserved-ejection-fraction-according-to-flow-and-gradient-classification-prevalence-and-outcomes
#10
Ariana González Gómez, Covadonga Fernández-Golfín, Juan Manuel Monteagudo, Carlos Izurieta, Rocío Hinojar, Ana García, Eduardo Casas, José Julio Jiménez-Nacher, José Luis Moya, Soledad Ruiz, José Luis Zamorano
BACKGROUND: Clinicians often encounter patients with apparently discordant echocardiographic findings, severe aortic stenosis (SAS) defined by aortic valve area (AVA) despite a low mean gradient. A new classification according to flow state and pressure gradient has been proposed. We sought to assess the prevalence, characteristics and outcomes of patients with asymptomatic SAS with preserved left-ventricular ejection fraction (LVEF) according to flow and gradient. METHODS AND RESULTS: In total 442 patients with SAS (AVAi<0...
August 29, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28853533/-the-importance-of-lead-avr-in-the-evaluation-of-an-ecg-strip
#11
Asaf Shemer, Pinchas Halpern
Over the years, the aVR lead has been overlooked by clinicians while observing a normal 12-lead ECG (electrocardiogram). A positive P-QRS complex in the aVR lead should raise prompt suspicion for either a congenital heart malrotation or a lead misplacement. In this article we present a case of an asymptomatic patient and a pathological ECG strip displaying ST elevations and a positive QRS in the aVR lead. A follow-up ECG was performed in the emergency department, and revealed a normal sinus rhythm with no abnormalities indicating acute ischemia...
August 2017: Harefuah
https://www.readbyqxmd.com/read/28846524/outcome-of-patients-with-low-flow-low-gradient-severe-aortic-stenosis-who-underwent-aortic-valve-replacement
#12
Xing Li Fan, Jiajun Zhang, Chong Wang, Hongmei Chong, Guanxin Zhang, Qing Xue, Yangfeng Tang, Lin Han
It is well-documented that stroke volume and gradient are indexed to classify patients with aortic stenosis into several phenotypes. The purpose of the present study was to estimate the impact of stroke volume and gradient on the clinical outcome of patients with AS who have undergone aortic valve replacement. Methods: A total of 154 consecutive patients were studied. They all had severe aortic stenosis (aortic valve area [AVA] ≤ 1 cm², left ventricular ejection fraction [LVEF] ≥ 50%) and underwent aortic valve replacement (AVR) from January 1, 2004 to December 31, 2010...
July 20, 2017: Heart Surgery Forum
https://www.readbyqxmd.com/read/28846191/rmg8-and-rmg7-wheat-genes-for-resistance-to-the-wheat-blast-fungus-recognize-the-same-avirulence-gene-avr-rmg8
#13
Vu Lan Anh, Yoshihiro Inoue, Soichiro Asuke, Trinh Thi Phuong Vy, Nguyen Tuan Anh, Shizhen Wang, Izumi Chuma, Yukio Tosa
Rmg8 and Rmg7 are genes for resistance to the wheat blast fungus (Pyricularia oryzae) located on 2B chromosome in hexaploid wheat and 2A chromosome in tetraploid wheat, respectively. AVR-Rmg8, an avirulence gene corresponding to Rmg8, was isolated from a wheat blast isolate through map-based strategy. The cloned fragment encoded a small protein containing a putative signal peptide. AVR-Rmg8 was recognized not only by Rmg8 but also by Rmg7, suggesting that these two resistance genes are equivalent to a single gene from the viewpoint of resistance breeding...
August 28, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28844834/what-makes-new-ischemic-lesions-symptomatic-after-aortic-valve-replacement
#14
Ronen R Leker, Steven R Messé, Guray Erus, Michel Bilello, Molly Fanning, Michael Acker, Allie Massaro, Scott E Kasner, Thomas Floyd
BACKGROUND: Acute cerebral infarctions on diffusion-weighted magnetic resonance imaging (MRI) are common after cardiothoracic surgery. However, most are asymptomatic and we aimed to identify features associated with clinical stroke symptoms. METHODS: Patients over 65 years of age undergoing surgical aortic valve replacement (AVR) for calcific stenosis were prospectively recruited (N = 196). All patients underwent neurological evaluation preoperatively and on postoperative days 1, 3, and 7, and MRI on planned postoperative day 5...
August 24, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28833552/a-rare-complication-of-mechanical-aortic-valve-replacement-separation-in-the-region-of-the-mitral-aortic-intervalvular-fibrosa
#15
Mehmet Celik, Ahmet Güner, Alev Kılıçgedik, Sabahattin Gunduz, Abdulrahman Naser, Elif Eroglu Büyüköner, Muzaffer Kahyaoglu, Cagatay Onal, Gokhan Kahveci
A 28-year-old man was admitted to our emergency service with a shortness of breath and palpitation. On admission, his blood pressure was high and he was in hypertensive pulmonary edema. His physical examination showed rales in both lungs and pansystolic murmur at mitral focus. His medical history included aortic valve replacement (AVR) because of native aortic valve infective endocarditis. Transthoracic echocardiography (TTE) showed normal functional aortic valve. Color flow imaging demonstrated severe mitral regurgitation with posterior eccentric jet...
August 2017: Echocardiography
https://www.readbyqxmd.com/read/28827255/self-reported-health-status-treatment-decision-and-survival-in-asymptomatic-and-symptomatic-patients-with-aortic-stenosis-in-a-western-norway-population-undergoing-conservative-treatment-a-cross-sectional-study-with-18-months-follow-up
#16
Kjersti Oterhals, Rune Haaverstad, Jan Erik Nordrehaug, Geir Egil Eide, Tone M Norekvål
OBJECTIVES: To investigate symptoms and self-reported health of patients conservatively treated for aortic stenosis (AS) and to identify factors associated with treatment decision and patient outcomes. DESIGN: A cross-sectional survey with an 18-month follow-up. SETTING: One tertiary university hospital in Western Norway. PARTICIPANTS: In all, 1436 patients were diagnosed with AS between 2000 and 2012, and those 245 still under conservative treatment in 2013 were included in this study...
August 21, 2017: BMJ Open
https://www.readbyqxmd.com/read/28820544/use-of-adjuncts-reduces-cardiopulmonary-bypass-time-during-minimally-invasive-aortic-valve-replacement
#17
Alice Wang, Sharon L McCartney, Judson B Williams, Asvin Ganapathi, Donald D Glower, Alina Nicoara, Jeffrey G Gaca
BACKGROUND: Minimally invasive aortic valve replacement (MIAVR) through a mini-thoracotomy is comparable to AVR through a sternotomy, but may have increased surgical times. The development of adjuncts such as the automatic knot fastener and percutaneous coronary sinus (CS) catheter may reduce this disadvantage. METHODS: A retrospective review conducted between 2002 and 2015 at a single institution revealed 78 patients who underwent MIAVR with adjuncts. The automatic knot fastener was used on all patients, and a successful CS catheter was placed and confirmed by echocardiography in 67 patients (86%)...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28820543/minimally-invasive-versus-transcatheter-and-surgical-aortic-valve-replacement-a-propensity-matched-study
#18
Matthew D Terwelp, Vinod H Thourani, Yelin Zhao, Prakash Balan, Catalin Loghin, Daniel Ocazionez, Anthony Estrera, Carson T Hoffmann, Vasilis C Babaliaros, Joseph Lamelas, Tom C Nguyen
BACKGROUND: An increasing number of options exist for the treatment of severe symptomatic aortic stenosis. The study aim was to compare short-term outcomes in patients undergoing surgical aortic valve replacement (SAVR), minimally invasive aortic valve replacement (MIAVR), and transcatheter aortic valve replacement (TAVR). METHODS: A multi-institutional retrospective review of 2,571 patients undergoing SAVR (n = 842), MIAVR via right anterior thoracotomy (n = 699) and TAVR (n = 1,030) between 2011 and 2014 was conducted...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28799252/the-impact-of-global-left-ventricular-afterload-on-left-ventricular-reverse-remodeling-after-aortic-valve-replacement
#19
Hisato Ito, Toru Mizumoto, Yu Shomura, Yasuhiro Sawada, Ko Kajiyama, Hideto Shimpo
BACKGROUND: Conventional indices such as prosthetic valve effective orifice area (EOA) or transvalvular pressure gradients (TPG) may be unreliable in predicting left ventricular (LV) reverse remodeling after aortic valve replacement (AVR). We hypothesized that the global LV afterload, including valvular and arterial impedance, could influence LV reverse remodeling after AVR. METHODS: Twenty-three consecutive aortic-stenosis patients (mean age, 76 ± 6.4 years) underwent isolated AVR using contemporary externally wrapped pericardial valves (19 mm, 10 patients; 21 mm 11; 23 mm, 2)...
August 11, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28795891/experience-using-closed-incision-negative-pressure-wound-therapy-in-sternotomy-patients
#20
B Philip, P McCluskey, J Hinchion
OBJECTIVE: Postoperative delayed wound healing, surgical site infections (SSIs), and other wound complications are associated with increased morbidity and health-care costs. In cardiothoracic surgery, wound complications can have life-threatening consequences. In recent years, negative pressure wound therapy (NPWT) has been applied over closed surgical incisions to help reduce tension and protect from external contamination. We report our initial experiences using a closed incision negative pressure therapy (ciNPT) over clean, closed sternotomy incisions at an Irish tertiary referral centre...
August 2, 2017: Journal of Wound Care
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