keyword
MENU ▼
Read by QxMD icon Read
search

Block AV

keyword
https://www.readbyqxmd.com/read/28438795/cystic-tumour-of-the-atrioventricular-node-treatment-dilemma
#1
Wael Abuzeid, Robert B H Myers
An asymptomatic 18-year-old black woman was found to have an incidental finding of third-degree atrioventricular (AV) block on a routine ECG. 2-Dimensional transthoracic echocardiography showed a heterogeneous mass in the region of the peri-membranous septum in the AV node area. A cardiac MRI showed a well-defined cystic mass arising from the right side of the interatrial septal wall. An MRI compatible permanent pacemaker was implanted with plans to monitor the tumour with non-invasive imaging. Cystic tumour of the AV node is a rare primary cardiac tumour...
April 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28431056/long-term-outcome-of-transvenous-pacemaker-implantation-in-infants-a-retrospective-cohort-study
#2
Laura M Vos, Janneke A E Kammeraad, Matthias W Freund, Andreas C Blank, Johannes M P J Breur
Aim: Evaluation of long-term outcome of transvenous pacemaker (PM) implantation in infants. Methods and Results: A retrospective analysis of all transvenous PM implantations in infants <10 kg between September 1997 and October 2001 was made. Indications for PM implantation, age at implantation, and determinants of long-term outcome including cardiac function, PM function, and PM (system) complications were noted. Seven patients underwent transvenous VVI(R) PM implantation...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28423233/ivabradine-versus-metoprolol-in-patients-with-acute-inferior-wall-myocardial-infarction-expanding-arena-for-ivabradine
#3
Rajendra K Go Khroo, K Priti, Bhanwar L Ranwa, Kamal Kishor, Devendra Bisht, Sajal Gupta
BACKGROUND: Atrioventricular (AV) blocks are of concern with the use of beta blockers in inferior wall myocardial infarction (MI). Ivabradine lowers heart rate with a lesser risk of AV blocks. OBJECTIVES: To compare ivabradine with metoprolol in acute inferior wall MI in terms of feasibility, tolerability and efficacy METHODS: It was a prospective double blind single centre randomized controlled study. Of 1032 patients with acute inferior wall MI, 468 eligible patients were randomized in 1:1 manner to ivabradine (group A) and metoprolol (group B)...
April 19, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28416247/adaptive-crt-in-patients-with-normal-av-conduction-and-left-bundle-branch-block-does-qrs-duration-matter
#4
Hiro Yamasaki, Daniel Lustgarten, Jeffrey Cerkvenik, David Birnie, Maurizio Gasparini, Kathy Lia-Fun Lee, Yukio Sekiguchi, Niraj Varma, Bernd Lemke, Randall C Starling, Kazutaka Aonuma
BACKGROUND: Adaptive cardiac resynchronization therapy (aCRT) is a dynamic optimization algorithm which paces only the left ventricle (LV) when atrio-ventricular (AV) conduction is normal, thus reducing right ventricular (RV) pacing. However, the impact of QRS duration on aCRT efficacy remains uncertain. We examined whether QRS duration impacts aCRT effectiveness in patients with left bundle branch block (LBBB) and preserved AV conduction. METHODS: Randomized patients in the Adaptive CRT trial, which enrolled NYHA III/IV patients, were used in this analysis...
April 12, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28407841/cardiovascular-comorbidity-in-inflammatory-rheumatological-conditions
#5
Jürgen Braun, Klaus Krüger, Bernhard Manger, Matthias Schneider, Christof Specker, Hans Joachim Trappe
BACKGROUND: Approximately 1.5 million adults in Germany suffer from an inflammatory rheumatological condition. The most common among these are rheumatoid arthritis and spondyloarthritis-above all axial spondyloarthritis, including ankylosing spondylitis (Bekhterev's disease) and psoriatic arthritis. These systemic inflammatory diseases often affect the heart as well. METHODS: This review is based on pertinent articles retrieved by a selective literature search, on current European guidelines, and on the authors' clinical experience...
March 24, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/28383846/-a-case-of-swallow-syncope
#6
P Trinco, B Falque, A-C Stilman, K Windhausen
Syncope accounts for nearly 5 % of the emergency intake causes. Swallow syncope is a rare form of cardio-neurogenic syncope. Less than a hundred cases were reported since its first description in the mid-18th century. We present the case of an 83-year-old patient with recurrent syncope occurring during meals. Telemetry monitoring revealed a severe bradycardia with complete AV block and a pause of 8 seconds. A dual chamber pacemaker was implanted and the syncopal episodes were abolished. We shall briefly review the diagnostic methods, mechanisms, and therapy of swallow syncope...
July 2016: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28383310/short-term-variability-of-repolarization-is-superior-to-other-repolarization-parameters-in-the-evaluation-of-diverse-antiarrhythmic-interventions-in-the-chronic-av-block-dog
#7
A Bossu, R Varkevisser, Hdm Beekman, Mjc Houtman, Mag van der Heyden, M A Vos
Short-term variability (STV), to quantify beat-to-beat variability of repolarization (BVR), is a surrogate parameter that reliably identifies proarrhythmic risk in preclinical models. Examples include not only the use in the chronic atrioventricular block (CAVB) dog model whereby it was developed, but also in vulnerable patients with heart failure or drug-induced long QT syndrome. In the CAVB dog model, STV can specifically distinguish between safe and unsafe drugs in proarrhythmic screening. Conversely, this dog model also offers the possibility to evaluate antiarrhythmic strategies in a setting of Torsades de Pointes (TdP) induction with a standard IKr inhibitor...
March 31, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28343654/negative-concordant-t-waves-during-paced-ventricular-rhythm-an-honest-enemy-is-better-than-a-false-friend
#8
Irene di Matteo, Pasquale Crea
The ECG diagnosis of myocardial infarction and ischemia in pacemaker patients is often challenging. The three criteria, proposed by Sgarbossa et al. in 1996, useful to suspect myocardial ischaemia in patient with left bundle branch block were demonstrated to be valid also in pacemaker patients. In the last years, concordant negative T waves in patients with ventricular paced rhythm were linked to various expressions of acute myocardial injury. If available, comparison with previous ECG is crucial. Partial persistence of cardiac memory during fusion beats created an anomalous concordance between negative T waves and QRS axis and could induce erroneous suspicions...
March 14, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28343653/swallow-induced-syncope-and-carotid-sinus-hypersensitivity-coincident-or-associated-conditions
#9
Eed Abu Zaid, Moti Haim, Hilmi Alnsasra, Yuval Konstantino
Swallow induced syncope is a rare clinical condition which is thought to result from an abnormal vagal reflex leading to bradycardia and cerebral hypoperfusion. It mostly occurs in patients with organic or functional disorders of the esophagus, and often requires permanent pacemaker implantation, along with treatment of the underlying esophageal pathology. In the following case, we report of a 71-year-old male with achalasia post per oral endoscopic myectomy, who presented with syncope and documented AV-block while eating solid food...
March 14, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28340894/wenckebach-pattern-in-right-bundle-branch-block-benign-or-not
#10
Weiting Huang, Paul Chun Yih Lim, Chi-Keong Ching
A Mobitz type I block (Wenckebach phenomenon) with narrow QRS complex is almost always due to a lesion in the AV node. In a type I block with wide QRS complex (>0.12sec), the block can be in the His-Purkinje system in 60-70% of the cases. Even though the progressive PR prolongation with every conducted beat suggests Wenckebach phenomenon, one needs to pay attention to the accompanying QRS complex. In the setting of persistent right bundle branch block, axis change of subsequent conducted beat before an unconducted p suggests alternating fascicular block, giving clue to unreliable infra-Hisian conduction; and in the setting of symptoms, a pacemaker should be implanted...
March 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28302382/congenital-heart-defect-causing-mutation-in-nkx2-5-displays-in-vivo-functional-deficit
#11
Abeer F Zakariyah, Rashida F Rajgara, John P Veinot, Ilona S Skerjanc, Patrick G Burgon
The Nkx2.5 gene encodes a transcription factor that plays a critical role in heart development. In humans, heterozygous mutations in NKX2.5 result in congenital heart defects (CHDs). However, the molecular mechanisms by which these mutations cause the disease remain unknown. NKX2.5-R142C is a mutation that was reported to be associated with atrial septal defect (ASD) and atrioventricular (AV) block in 13-patients from one family. The R142C mutation is located within both the DNA-binding domain and the nuclear localization sequence of NKX2...
April 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28299825/fingolimod-gilenya-%C3%A2-in-multiple-sclerosis-bradycardia-atrioventricular-blocks-and-mild-effect-on-the-qtc-interval-something-to-do-with-the-l-type-calcium-channel
#12
Sylvie Pilote, Chantale Simard, Benoit Drolet
Cardiac arrhythmias and ECG abnormalities including bradycardia, prolongation of the QT interval and atrioventricular (AV) conduction blocks have been extensively observed with fingolimod, the first marketed oral drug for treating the relapsing-remitting form of multiple sclerosis. The present study was aiming to further elucidate the effects of fingolimod on cardiac electrophysiology at three different levels; 1) in vitro, 2) ex vivo and 3) in vivo. 1) Patch-clamp experiments in whole cell configuration were performed on Cav 1...
March 16, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28294370/is-there-a-prognostic-relevance-of-electrophysiological-studies-in-bundle-branch-block-patients
#13
Harilaos Bogossian, Gerrit Frommeyer, Kornelius Göbbert, Fuad Hasan, Quy Suu Nguyen, Ilias Ninios, Dejan Mijic, Dirk Bandorski, Reinhard Hoeltgen, Melchior Seyfarth, Bernd Lemke, Lars Eckardt, Markus Zarse
BACKGROUND: The present European guidelines suggest a diagnostic electrophysiological (EP) study to determine indication for cardiac pacing in patients with bundle branch block and unexplained syncope. We evaluated the prognostic relevance of an EP study for mortality and the development of permanent complete atrioventricular (AV) block in patients with symptomatic bifascicular block and first-degree AV block. HYPOTHESIS: The HV interval is a poor prognostic marker to predict the development of permanent AV block in patients with symptomatic bifascicular block (BFB) and AV block I°...
March 15, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28280512/a-case-of-congenitally-corrected-transposition-of-great-arteries-an-infrequent-happenstance
#14
Prakash Ajmera, Vikas Medep
Congenitally corrected transposition of the great arteries (CCTGA) is rare form of congenital heart diseases. It may be present with or without associated anomalies. Patients with CCTGA are usually diagnosed at early stages of life due to associated anomalies, but they may even remain asymptomatic till later decades of their life. We report a case of a 42-year-old man who presented at neurosurgery department with dizziness, seizures, and loss of consciousness, in whom isolated CCTGA was discovered incidentally...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28262258/safer-and-escape-junctional-rhythm-a-singular-trigger-for-pacemaker-mediated-tachycardia
#15
Pasquale Crea, Teresa Crea, Giuseppe Picciolo, Francesco Luzza
A 70-year-old man, who previously received a dual chamber pacemaker for paroxysmal AV block (Sorin Symphony DR 2550), was noted on telemetry to have multiple episodes of rapid ventricular pacing at approximately 120bpm. Evaluation of the telemetry strips revealed that all of the rapid ventricular pacing episodes were initiated by brief runs of escape junctional rhythm. Programmed bradycardia parameters were AAI SafeR with lower rate limit of 50bpm.
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28259696/comparison-of-strategies-for-catheter-ablation-of-focal-atrial-tachycardia-originating-near-the-his-bundle-region
#16
Evgeny Lyan, Mauro Toniolo, Alexey Tsyganov, Luca Rebellato, Alessandro Proclemer, Massimiliano Manfrin, Anatoly Nechepurenko, Alexandr Morozov, Ayan Abdrahmanov, Grigory Gromyko, Vitaly Lyashenko, Marina Yakovleva
BACKGROUND: Recent studies have suggested that para-Hisian atrial tachycardia (AT) can be successfully ablated from the right atrium (RA), left atrium (LA), or noncoronary cusp (NCC) in the aorta; however, the best approach remains unclear. OBJECTIVE: This study aimed to compare different approaches to radiofrequency catheter ablation (RFCA) of para-Hisian AT. METHODS: We retrospectively analyzed 68 consecutive patients (49[72%] women; mean age 61 ± 13 years) treated with RFCA for this type of AT...
March 2, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28248410/low-permanent-pacemaker-rates-following-lotus-device-implantation-for-transcatheter-aortic-valve-replacement-due-to-modified-implantation-protocol
#17
Florian Krackhardt, Behrouz Kherad, Maximilian Krisper, Burkert Pieske, Michael Laule, Carsten Tschöpe
BACKGROUND: Conduction disturbances requiring permanent pacemaker implantation following transcatheter aortic valve replacement (TAVR) are a common problem. Pacemaker implantation rates after TAVR appear to be higher compared to conventional aortic valve replacement. The aim of this study was to analyze whether a high annulus implantation conveys the benefit of a decreased rate of permanent pacemaker implantation while being safe and successful according to VAR2-criteria. METHODS: A total of 23 patients with symptomatic severe aortic valve stenosis, an aortic annulus of 19-27mm and at high risk for surgery were treated with the Lotus valve...
March 1, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28219978/a-mutation-in-the-g-protein-gene-gnb2-causes-familial-sinus-node-and-atrioventricular-conduction-dysfunction
#18
Birgit Stallmeyer, Johanna Kuß, Stefan Kotthoff, Sven Zumhagen, Kirsty S Vowinkel, Susanne Rinne, Lina A Matschke, Corinna Friedrich, Ellen Schulze-Bahr, Stephan Rust, Guiscard Seebohm, Niels Decher, Eric Schulze-Bahr
Rationale: Familial sinus node and atrioventricular (AV) conduction dysfunction is a rare disorder that leads to paroxysmal dizziness, fatigue and syncope due to a temporarily or permanent reduced heart rate. To date, only a few genes for familial sinus and/or AV conduction dysfunction are known and the majority of cases remain etiologically unresolved. Objective: We aim to identify the disease gene in a large three-generation family (n=25) with autosomal dominant sinus node dysfunction (SND) and AV block (AVB) and to characterise the mutation-related pathomechanisms in familial SND+AVB...
February 20, 2017: Circulation Research
https://www.readbyqxmd.com/read/28211989/timothy-syndrome-1-genotype-without-syndactyly-and-major-extracardiac-manifestations
#19
Róbert Sepp, Lidia Hategan, Attila Bácsi, Judit Cseklye, László Környei, János Borbás, Márta Széll, Tamás Forster, István Nagy, Zoltán Hegedűs
Timothy syndrome 1 (TS1) is a rare genetic disorder characterized by multisystem abnormalities including QT prolongation, congenital heart defects, facial dysmorphism, episodic hypoglycemia, and neurological symptoms. A morphological hallmark of TS1 is syndactyly, present in all cases. TS1 is caused by the canonical p.Gly406Arg mutation in the alternatively spliced exon 8A in the CACNA1C gene, encoding for the main cardiac L-type calcium channel. A variant case of TS1 is reported. The proband had intermittent fetal bradycardia with heart rate of 72 bpm...
March 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28197280/predictors-of-permanent-pacemaker-implantation-after-coronary-artery-bypass-grafting-and-valve-surgery-in-adult-patients-in-current-surgical-era
#20
Bandar Al-Ghamdi, Yaseen Mallawi, Azam Shafquat, Alexandra Ledesma, Nadiah AlRuwaili, Mohamed Shoukri, Shahid Khan, Aly Al Sanei
BACKGROUND: Permanent pacemaker (PPM) implantation after cardiac surgery is required in 0.4-6% of patients depending on cardiac surgery type. PPM implantation in the early postoperative period may reduce morbidity and postoperative hospital stay. We performed a retrospective review of electronic medical records of adult patients with coronary artery bypass grafting (CABG), valve surgery, or both, over a 3-year period. Our aim was to identify predictors of PPM requirements and PPM dependency on follow-up in the current surgical era...
August 2016: Cardiology Research
keyword
keyword
16813
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"