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Catheter Mapping

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https://www.readbyqxmd.com/read/27911463/vascular-access-types-in-patients-starting-hemodialysis-after-failed-kidney-transplant-does-close-nephrology-follow-up-matter
#1
Naveed Ul Haq, Mohamed Said Abdelsalam, Mohammed Mahdi Althaf, Abdulrahman Ali Khormi, Hassan Al Harbi, Bader Alshamsan, Mamdouh Nasser Albaqumi, Dieter Clemens Broering, Lutfi Alkorbi, Hassan Ali Aleid
BACKGROUND: Native arteriovenous fistulae (AVFs) are preferred while central venous catheters (CVCs) are least suitable vascular access (VA) in patients requiring hemodialysis (HD). Unfortunately, around 80% of patients start HD with CVCs. Late referral to nephrologist is thought to be a factor responsible for this. We retrospectively analyzed the types of VA at HD initiation in renal transplant recipients followed by nephrologists with failed transplant. If early referral to nephrologist improves AVF use, these patients should have higher prevalence of AVF at HD initiation...
November 28, 2016: Journal of Vascular Access
https://www.readbyqxmd.com/read/27909489/advanced-mapping-systems-to-guide-atrial-fibrillation-ablation-electrical-information-that-matters
#2
REVIEW
Sotirios Nedios Md, Philipp Sommer Md, Andreas Bollmann Md PhD, Gerhard Hindricks Md
Catheter ablation is an established and widespread treatment for atrial fibrillation (AF). Contemporary electroanatomical mapping systems (EAMs) have been developed to facilitate mapping processes but remain limited by spatiotemporal and processing restrictions. Advanced mapping systems emerged from the need to better understand and ablate complex AF substrate, by improving the acquisition and illustration of electrophysiological information. In this review, we present you the recently advanced mapping systems for AF ablation in comparison to the established contemporary EAMs...
April 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27908766/mechanisms-and-predictors-of-recurrent-tachycardia-following-catheter-ablation-for-d-transposition-of-the-great-arteries-after-the-mustard-or-senning-operation
#3
Roberto G Gallotti, Himani Madnawat, Kevin M Shannon, Jamil A Aboulhosn, Farnoosh Nik-Ahd, Jeremy P Moore
BACKGROUND: The Senning and Mustard operations for DTGA are associated with a heightened risk for supraventricular tachycardia. Catheter ablation has been shown to be acutely successful for achieving rhythm control in this population, but the mechanisms of recurrence are ill-defined. OBJECTIVES: We hypothesized that the type and degree of recurrence would vary by the surgical technique employed. METHODS: All consecutive catheter ablation procedures for DTGA after Mustard/Senning operation between 2004 and 2016 at a single center were reviewed...
November 28, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27890738/ventricular-arrhythmias-associated-with-left-ventricular-non-compaction-electrophysiological-characteristics-mapping-and-ablation
#4
Daniele Muser, Jackson J Liang, Walter R T Witschey, Rajeev K Pathak, Simon Castro, Silvia Magnani, Erica S Zado, Fermin C Garcia, Benoit Desjardins, David J Callans, David S Frankel, Francis E Marchlinski, Pasquale Santangeli
BACKGROUND: Left ventricular non-compaction (LVNC) is a primary cardiomyopathy that can present with recurrent ventricular arrhythmias (VAs). Data on the benefit of catheter ablation (CA) of VAs in LVNC are lacking. OBJECTIVES: To describe the electrophysiologic features and outcomes of CA of VAs in LVNC. METHODS: The cohort consisted of 9 patients (age 42±15 years) with diagnosis of LVNC based upon established criteria and VA (VT in 3 and frequent PVCs in 6) despite treatment with a mean of 2±1 antiarrhythmic drugs (AADs)...
November 23, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27890183/imaging-evaluation-and-treatment-of-vascular-lesions-at-the-skull-base
#5
REVIEW
Gaurav Jindal, Timothy Miller, Prashant Raghavan, Dheeraj Gandhi
A wide range of congenital and acquired vascular entities may occur in the skull base. Although some are diagnosed incidentally and merit no treatment, others may require surgical or image-guided endovascular or percutaneous approaches for management. The complex anatomy of the skull base can make diagnosis challenging. A combination of computed tomography scans and MR imaging, and catheter angiography may be required for diagnosis and mapping. Endovascular treatment plays an important part in many of the acquired vascular lesions, such as vascular neoplasms and traumatic dissections/aneurysms...
January 2017: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/27885742/catheter-ablation-in-the-right-ventricular-outflow-tract-associated-with-occlusion-of-left-anterior-descending-coronary-artery
#6
Daniel Benhayon, Eyal Nof, William W Chik, Francis Marchlinski
Major vessel injury during right ventricular outflow tract ablation is not something widely recognized, and routine evaluation of the left anterior descending artery (LAD) location in relation to the septal right ventricle is not routinely performed. In the present article we report a case of acute LAD occlusion after RVOT ablation and then illustrate the intimately close relationship of the left anterior descending artery to the anterior septal site of the RVOT (∼ 2-3 cm under the pulmonic valve), using a combination of intracardiac echocardiography and 3D electroanatomical mapping (EAM) recorded during a second case, in order to specifically point to the area at risk...
November 25, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27878364/-av-reentrant-tachycardia-and-wolff-parkinson-white-syndrome-diagnosis-and-treatment
#7
Frederik Voss, Lars Eckardt, Sonia Busch, Heidi L Estner, Daniel Steven, Philipp Sommer, Christian von Bary, Hans-Ruprecht Neuberger
The AV-reentrant tachycardia (AVRT) is a supraventricular tachycardia with an incidence of 1-3/1000. The pathophysiological basis is an accessory atrioventricular pathway (AP). Patients with AVRT typically present with palpitations, an on-off characteristic, anxiety, dyspnea, and polyuria. This type of tachycardia may often be terminated by vagal maneuvers. Although the clinical presentation of AVRT is quite similar to AV-nodal reentrant tachycardias, the correct diagnosis is often facilitated by analyzing a standard 12-lead ECG at normal heart rate showing ventricular preexcitation...
November 22, 2016: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/27875475/scar-based-catheter-ablation-for-persistent-atrial-fibrillation
#8
Pablo B Nery, Rebecca Thornhill, Girish M Nair, Elena Pena, Calum J Redpath
PURPOSE OF REVIEW: Percutaneous catheter ablation can be an effective treatment for paroxysmal atrial fibrillation. However, catheter ablation for the treatment of persistent atrial fibrillation or long-standing persistent atrial fibrillation is associated with success rates of 45-50% at 1 year. To address the challenge of ablating patients with persistent atrial fibrillation, several approaches have been proposed. Atrial scar-based catheter ablation is a promising strategy for ablation of persistent atrial fibrillation...
January 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/27871986/second-generation-cryoballoon-ablation-without-the-use-of-real-time-recordings-a-novel-strategy-based-on-a-temperature-guided-approach-to-ablation
#9
Saverio Iacopino, Giacomo Mugnai, Ken Takarada, Gaetano Paparella, Erwin Ströker, Valentina De Regibus, Hugo Enrique Coutino-Moreno, Rajin Choudhury, Juan Pablo Abugattas de Torres, Pedro Brugada, Carlo de Asmundis, Gian-Battista Chierchia
BACKGROUND: The achievement of -40°C within 60 seconds has proven to independently predict durable PV isolation in the setting of second generation cryoballoon (CB-A; Medtronic; USA) ablation. OBJECTIVE: In the present study, we sought to evaluate a strategy based on the attainment of the specific parameter of -40°C within the first 60 seconds during cryoenergy applications in the setting of CB-A without the use of an inner lumen mapping catheter (ILMC) (Achieve; Medtronic, USA) for the visualisation of real time recordings (RTR)...
November 18, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27870969/preliminary-experience-with-high-density-electroanatomical-mapping-for-ablation-of-atrial-fibrillation-comparison-of-mini-basket-and-novel-open-irrigated-magnetic-ablation-catheter-in-consecutive-patients
#10
Jedrzej Kosiuk, Sebastian Hilbert, Silke John, Livio Bertagnolli, Gerhard Hindricks, Andreas Bollmann
BACKGROUND: Recently, a novel electroanatomic mapping system enabling rapid and automatic acquisition of high-resolution maps has been introduced. Previous reports focused on system use in combination with a mini-basket catheter. However, a novel system-specific, magnet-enabled ablation catheter eliminates the need for the mini-basket catheter and can potentially reduce procedure complexity and cost. Here we present our first experience from two consecutive case series using both procedural settings...
November 13, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27868336/vascular-imaging-for-hemodialysis-vascular-access-planning
#11
Rita L McGill, Robin Ruthazer, Eduardo Lacson, Klemens B Meyer, Dana C Miskulin, Daniel E Weiner
Introduction Central venous catheters (CVC) increase risks associated with hemodialysis (HD), but may be necessary until an arteriovenous fistula (AVF) or graft (AVG) is achieved. The impact of vascular imaging on achievement of working AVF and AVG has not been firmly established. Methods Retrospective cohort of patients initiating HD with CVC in 2010-2011, classified by exposure to venography or Doppler vein mapping, and followed through December 31, 2012. Standard and time-dependent Cox models were used to determine hazard ratios (HRs) of death, working AVF, and any AVF or AVG...
November 20, 2016: Hemodialysis International
https://www.readbyqxmd.com/read/27867071/evaluation-of-a-novel-high-resolution-mapping-system-for-catheter-ablation-of-ventricular-arrhythmias
#12
Karthik Viswanathan, Lilian Mantziari, Charles Butcher, Emily Hodkinson, Eric Lim, Habib Khan, Sandeep Panikker, Shouvik Haldar, Julian W E Jarman, David G Jones, Wajid Hussain, John P Foran, Vias Markides, Tom Wong
BACKGROUND: The mapping of ventricular arrhythmias in humans using a mini-basket 64-electrode catheter paired with a novel automatIc mapping system (Rhythmia(TM)) has not been evaluated. OBJECTIVE: To evaluate the safety and efficacy of mapping ventricular arrhythmias and clinical outcomes after ablation using this system. METHODS: Electroanatomic (EA) maps for ventricular arrhythmias were obtained during 20 consecutive procedures in 19 patients (ventricular tachycardia [VT] 12; ventricular ectopy [VE] 7)...
November 17, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27866674/quantitative-t2-mapping-for-detection-and-quantification-of-thrombophlebitis-in-a-rabbit-model
#13
Dar Weiss, Oren M Rotman, Shmuel Einav
Short peripheral catheter thrombophlebitis (SPCT), a sterile inflammation of the vein wall, is the most common complication associated with short peripheral catheters (SPCs) and affects up to 80% of hospitalized patients receiving IV therapy. Extensive research efforts have been devoted for improvement and optimization of the catheter material, but means for examination of any novel design are limited, inaccurate and require costly comprehensive pre-clinical and clinical trials. Therefore, there is a conclusive need for a reliable quantitative method for evaluation of SPCT, in particular for research purposes examining the thrombophlebitis-related symptoms of any novel catheter design...
November 15, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27853943/endocardial-voltage-mapping-of-pulmonary-veins-with-an-ultra-high-resolution-system-to-evaluate-atrial-myocardial-extensions
#14
Francesco Santoro, Christian Sohns, Ardan M Saguner, Natale Daniele Brunetti, Christine Lemes, Shibu Mathew, Christian-H Heeger, Bruno Reißmann, Tilman Maurer, Johannes Riedl, Thomas Fink, Kentaro Hayashi, Feifan Ouyang, Matteo Di Biase, Karl-Heinz Kuck, Andreas Metzner
INTRODUCTION: Atrial fibrillation (AF) is mainly triggered by arrhythmogenic foci originating from atrial myocardial extensions (MEs) into the pulmonary veins (PVs). Aim of the study was to evaluate endocardial voltage maps of PVs as a surrogate parameter for the extent of MEs in subjects with AF through a ultra-high-density mapping system. METHODS: Sixty-four bipolar electrograms were recorded simultaneously from the Orion mini-basket catheter placed in 72 PVs of 18 consecutive patients with paroxysmal/persistent AF undergoing PV isolation (PVI)...
November 16, 2016: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/27842698/efficacy-and-safety-of-catheter-ablation-of-atrial-tachycardia-through-a-direct-approach-from-noncoronary-sinus-of-valsalva
#15
Mauro Toniolo, Luca Rebellato, Stefano Poli, Elisabetta Daleffe, Alessandro Proclemer
Noncoronary aortic cusp (NCAC) in the aorta represents a challenging location for catheter ablation of focal atrial tachycardias (ATs) arising near the His-bundle region. The purpose of this study was to provide an updated report on the methods, efficacy, and safety of catheter ablation of ATs originating from NCAC. The study population includes 23 patients (18 women [78%], mean age 65 ± 12 years) with highly symptomatic AT. The atrial mapping was performed during tachycardia to define the earliest atrial activation site...
October 20, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27822741/isolated-brain-trauma-in-cats-triggers-rapid-onset-of-hypovolemia
#16
Peter Bentzer, Per-Olof Grände
BACKGROUND: Hemodynamic instability responsive to fluid resuscitation is common after a traumatic brain injury (TBI), also in the absence of systemic hemorrhage. The present study tests if an isolated severe TBI induces a decrease in plasma volume (PV). METHODS: The study was performed in three groups of anesthetized and tracheostomized male cats (n = 21). In one group (n = 8), the cats were prepared with a cranial borehole (10 mm i.d) used to expose the brain to a fluid percussion brain injury (FPI) (1...
November 7, 2016: Neurocritical Care
https://www.readbyqxmd.com/read/27788744/-clinical-analysis-of-19-cases-of-pregnant-women-with-rapid-arrhythmia-in-the-treatment-of-radiofrequency-catheter-ablation
#17
L Chu, J Zhang, Y N Li, D Y Long
: Objective: To investigate the risk of radiofrequency catheter ablation and maternal and infant in pregnant women with rapid arrhythmia during pregnancy. Methods: The clinical data of the 19 cases of pregnancy complicated with rapid arrhythmia were retrospectively analyzed and followed up, including the gestational week, the type of arrhythmia, the treatment, and the outcome of the mother and child in Beijing Anzhen Hospital of Capital Medical University from January 2002 to March 2016...
October 25, 2016: Zhonghua Fu Chan Ke za Zhi
https://www.readbyqxmd.com/read/27784685/reduced-uterine-perfusion-pressure-t-helper-17-cells-cause-pathophysiology-associated-with-preeclampsia-during-pregnancy
#18
Denise C Cornelius, Lorena M Amaral, Kedra Wallace, Nathan Campbell, Alexia J Thomas, Jeremy Scott, Florian Herse, Gerd Wallukat, R Dechend, Babbette D LaMarca
Preeclampsia is associated with chronic inflammation and an imbalance among T-helper cell subtypes with an increase in T-helper 17 (TH17) cells. The objective of this study was to determine a role for TH17s from the RUPP rat model of preeclampsia to cause hypertension and chronic inflammation during pregnancy. CD4+/CD25- T cells were isolated from rat spleens, cultured in TH17 media, and were verified as TH17s via flow cytometry. On day 12 of gestation, 1x106 TH17 cells from RUPP rats were adoptively transferred into NP rats, carotid catheters inserted on day 18, and on day 19 mean arterial pressure (MAP) was recorded, serum and plasma were collected, and oxidative stress and AT1-AA production were analyzed...
October 26, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27782003/electromechanical-wave-imaging-ewi-validation-in-all-four-cardiac-chambers-with-3d-electroanatomic-mapping-in-canines-in-vivo
#19
Alexandre Costet, Elaine Wan, Ethan Bunting, Julien Grondin, Hasan Garan, Elisa Konofagou
Characterization and mapping of arrhythmias is currently performed through invasive insertion and manipulation of cardiac catheters. Electromechanical wave imaging (EWI) is a non-invasive ultrasound-based imaging technique, which tracks the electromechanical activation that immediately follows electrical activation. Electrical and electromechanical activations were previously found to be linearly correlated in the left ventricle, but the relationship has not yet been investigated in the three other chambers of the heart...
November 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27780243/local-electrical-dyssynchrony-during-atrial-fibrillation-theoretical-considerations-and-initial-catheter-ablation-results
#20
Pawel Kuklik, Benjamin Schäffer, Boris A Hoffmann, Anand N Ganesan, Doreen Schreiber, Julia M Moser, Ruken Ö Akbulak, Arian Sultan, Daniel Steven, Bart Maesen, Ulrich Schotten, Christian Meyer, Stephan Willems
BACKGROUND: Electrogram-based identification of the regions maintaining persistent Atrial Fibrillation (AF) is a subject of ongoing debate. Here, we explore the concept of local electrical dyssynchrony to identify AF drivers. METHODS AND RESULTS: Local electrical dyssynchrony was calculated using mean phase coherence. High-density epicardial mapping along with mathematical model were used to explore the link between local dyssynchrony and properties of wave conduction...
2016: PloS One
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