Read by QxMD icon Read


Serkan Topaloglu, Ozcan Ozeke, Serkan Cay, Firat Ozcan, Serhat Koca, Dursun Aras
Ebstein's anomaly is often accompanied by either Wolff-Parkinson-White syndrome or atriofascicular Mahaim. These bypass tracts give rise to antidromic atrioventricular (AV) re-entrant tachycardias, in which the bypass tract serves as the anterograde limb of the circuit and the AV node as the retrograde limb of the reentrant circuit. Since the antidromic AV reentrant tachycardia over a Mahaim fibre has a typically left bundle braunch block (LBBB) morphology, it is easy to make a misdiagnosis of supraventricular tachycardia with functional LBBB or even of ventricular tachycardia particularly in the presence of negative concordance...
July 2018: Journal of Electrocardiology
Yakup Ergul, Serhat Koca, Celal Akdeniz, Volkan Tuzcu
In Ebstein's anomaly (EA), tachycardia substrates are complex, and accessory pathway (AP) ablations are often challenging. This study demonstrates the utility of the EnSite Velocity system (St. Jude Medical, St Paul, MN) in the catheter ablation of supraventricular tachycardia in children with EA. Twenty patients [Female/Male = 8/12, median age 11.5 years (2.6-18)] with EA who underwent catheter ablation guided by the EnSite Velocity system between December 2011 and December 2016 were retrospectively evaluated...
June 7, 2018: Pediatric Cardiology
José Nunes de Alencar Neto, Saulo Rodrigo Ramalho de Moraes, Eduardo Back Sternick, Hein J J Wellens
Atypical bypass tracts or variants of ventricular pre-excitation are rare anatomic structures often with rate-dependent slowing in conduction, called decremental conduction. During sinus rhythm, electrocardiographic recognition of those structures may be difficult because unlike in the Wolff-Parkinson-White syndrome where usually overt ventricular pre-excitation is present, the electrocardiogram (ECG) often shows a subtle pre-excitation pattern because of less contribution to ventricular activation over the slow and decrementally conducting bypass...
May 16, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Michael S Wu, James E Ip, George Thomas, Steven M Markowitz, Jim W Cheung, Christopher F Liu, Bruce B Lerman
No abstract text is available yet for this article.
March 2018: HeartRhythm Case Reports
Gustavo Lima da Silva, Nuno Cortez-Dias, Ana Bernardes, João Sousa
We present the case of a previously healthy 42-year-old man who attended the emergency department due to a sudden onset of rapid and regular palpitations. The ECG showed 190 bpm, wide QRS with left bundle branch block tachycardia. He was started on amiodarone with progression to 230 bpm, wide QRS tachycardia with multiple morphologies, followed by spontaneous conversion to sinus rhythm, normal PR interval and rS pattern in LIII. The echocardiogram was negative for structural heart disease. The electrophysiological study demonstrated the presence of an accessory pathway with anterograde decremental conduction and no retrograde conduction...
March 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
Nikolaos Fragakis
No abstract text is available yet for this article.
December 2017: Arrhythmia & Electrophysiology Review
Kazushi Ueshima, Yoshihide Nakamura, Satoru Takeno, Toshiharu Miyake, Tsukasa Takemura
We report a case of a 7-year-old girl with atriofascicular Mahaim (AFM) pathway concomitant with Ebstein's anomaly. The QRS wave showed left bundle branch block pattern on electrocardiogram. Holter electrocardiogram showed prolongation of the PR interval and QRS morphological change during sinus tachycardia. An electrophysiological study demonstrated that the distal His potential appeared earlier than the proximal His potential, which suggested retrograde His conduction toward the atrioventricular node. Conduction from the Mahaim fiber to the His bundle was faster than that from the atrioventricular node towards the His bundle...
October 2017: Journal of Arrhythmia
Stéphane Boulé, William Escande, Nicolas Lamblin
No abstract text is available yet for this article.
November 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Ibrahim Gul, Qamaruddin Roziman, Aamir Hameed Khan
We present the case report of a 22-year man, with incessant palpitations, chest pain, shortness of breath, and pulsations in his neck for the past 7 months. He was referred to the cardiology unit for workup of wide complex tachycardia (WCT). His echocardiography, 6 months earlier, had demonstrated severe left ventricular (LV) systolic dysfunction, severe global hypokinesia, mild tricuspid regurgitation (TR), and mild mitral regurgitation (MR) which resolved with medical therapy including beta-blockers. He underwent electrophysiological study, which revealed a decremental right sided atriofascicular pathway causing a WCT with left bundle branch block (LBBB) morphology and left axis deviation (LAD, Mahaim tachycardia)...
November 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
Hiroko Asakai, Laura Fenwick, Robert M Hamilton
No abstract text is available yet for this article.
November 2016: HeartRhythm Case Reports
Demosthenes G Katritsis, Hein J Wellens, Mark E Josephson
The term Mahaim conduction is conventionally used to describe decrementally conducting connections between the right atrium or the AV node and the right ventricle in or close to the right bundle branch. Although such pathways are rare, their unique properties make their diagnosis and treatment cumbersome. In this article we review the published evidence, and discuss the electrocardiographic and electrophysiological characteristics as well as the anatomy and origin of these fibres.
April 2017: Arrhythmia & Electrophysiology Review
Giulia Ottaviani, L Maximilian Buja
Sudden cardiac death (SCD) is defined as the unexpected death without an obvious noncardiac cause that occurs within 1 h of witnessed symptom onset (established SCD) or within 24 h of unwitnessed symptom onset (probable SCD). In the United States, its incidence is 69/100,000 per year. Dysfunctions of the cardiac conduction and autonomic nervous systems are known to contribute to SCD pathogenesis, even if most clinicians and cardiovascular pathologists lack experience with detailed examination of the cardiac conduction system and fail to recognize lesions that are crucial to explain the SCD itself...
November 2016: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
Enes Elvin Gül, Celal Akdeniz, Volkan Tuzcu
The atriofascicular accessory pathway (AP), known as the Mahaim pathway, is a rare form of pre-excitation, comprising less than 3% of all APs. Mahaim AP is characterized by decremental, anterograde-only conduction, and antidromic tachycardia with left bundle branch morphology. Prevalence of Mahaim AP in Ebstein's anomaly is significantly high. In addition, combination of Wolff-Parkinson-White (WPW) syndrome and Mahaim AP in patients with Ebstein's anomaly has been reported. Presently described is the coexistence of Mahaim AP and manifest WPW syndrome in a patient with Ebstein's anomaly, who was successfully ablated without fluoroscopy...
July 2016: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
J Hebe
Supraventricular tachycardia (SVT) based on congenital substrates, such as accessory pathways or dual atrioventricular nodal properties, occur with an increased probability linked to specific congenital heart defects (CHDs). In the literature, the association of Ebstein's anomaly with accessory pathways and with Mahaim fibers is most prominent. Compared with patients with otherwise normal hearts, the clinical relevance of SVT is typically more severe and therefore antiarrhythmia treatment is a necessity in many cases...
June 2016: Herzschrittmachertherapie & Elektrophysiologie
Sok-Sithikun Bun, Decebal Gabriel Latcu, Abdelkarim Errahmouni, Naïma Zarqane, Khelil Yaïci, Abdelhamid Moustaghfir, Amale Tazi-Mezalek, Nadir Saoudi
AIMS: Radiofrequency catheter ablation (RFCA) for arrhythmias in the context of short-term medical missions (MM) in a developing country has not been reported so far. We describe here our experience with RFCA and pacemaker implantation in Morocco with a fully portable electrophysiological (EP) system under the auspice of the Monaco-Morocco Cardiology Association. METHODS AND RESULTS: Since November 2007, two to three MM (mean duration 4 days including transportation) per year were conducted (including two physicians and one nurse from Monaco) and were alternately located in Marrakech, Fes, Agadir, Casablanca, Rabat, Essaouira, and Oujda...
July 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Erkut Ozturk, Yakup Ergul, I Cansaran Tanidir, Celal Akdeniz, H Tahsin Tola, Volkan Tuzcu
BACKGROUND: The presence of Mahaim accessory pathways (MAP) with anterograde decremental conduction is a disorder that leads to antidromic atrioventricular reentrant tachycardia. There are rare reports of cryoablation use in MAP. This study aims at sharing our experience with using cryoablation to treat MAP in children. METHODS: Electrophysiology study and catheter ablation were performed in 14 patients diagnosed with Mahaim tachycardia between January 2010 and December 2013...
March 2015: Pacing and Clinical Electrophysiology: PACE
Nikola Pavlović, Michael Kühne, Christian Sticherling
No abstract text is available yet for this article.
December 2014: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Neslihan Kiplapinar, Celal Akdeniz, Yakup Ergül, Volkan Tuzcu
No abstract text is available yet for this article.
September 2014: Anadolu Kardiyoloji Dergisi: AKD, the Anatolian Journal of Cardiology
Chandramohan Ramasamy, Senthil Kumar, Raja J Selvaraj
Automaticity has been described in Mahaim pathways, both spontaneously and during radiofrequency ablation. We describe an unusual case of automatic rhythm from a Mahaim pathway presenting as parasystole. The parasystolic beats were also found to initiate tachycardia, resulting in initial presentation with incessant tachycardia and tachycardia induced cardiomyopathy.
July 2014: Indian Pacing and Electrophysiology Journal
Roopa Tekkatte, Ahmed Hamoud, Claire Warren, James Barry
Hypertrophic cardiomyopathy's (HCM) association with sudden cardiac death is well recognised. The risk of sudden cardiac death is known to increase when there is a history of unexplained syncope, abnormal blood pressure response during exercise, severe left ventricular hypertrophy or a family history of unexplained death. Implantable Cardioverter Defibrillator (ICD) implantation has been widely used for primary and secondary prevention of sudden cardiac death (SCD) in people with HCM. Subcutaneous ICD (S-ICD) therapy has been developed to overcome some of the problems associated with the transvenous leads used in conventional ICDs...
July 2014: Indian Pacing and Electrophysiology Journal
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"