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Journal of Electrocardiology

Eva Bernal, Antoni Bayés-Genís, Albert Ariza-Solé, Francesc Formiga, Maria T Vidán, Luis Alberto Escobar-Robledo, Jaime Aboal, Lídia Alcoberro, Carme Guerrero, Iván Ariza-Segovia, Ana Hernández de Benito, Pau Vilardell, José Carlos Sánchez-Salado, Victoria Lorente, Antoni Bayés de Luna, Manuel Martinez-Sellés
No abstract text is available yet for this article.
April 18, 2018: Journal of Electrocardiology
Andrzej Ząbek, Barbara Małecka, Maciej Dębski, Krzysztof Boczar, Katarzyna Holcman, Mateusz Ulman, Jacek Lelakowski
The electrocardiogram (ECG) interpretation in patients with cardiac resynchronization therapy (CRT) may be challenging. The difficulty increases if not well-known pacemaker algorithm is turned on. We show a T-wave protection algorithm (LVTP) in a patient with CRT. Accelerated sinus rhythm and intermittent oversensing in left ventricular channel resulted in loss of CRT pacing. The restoration of biventricular pacing occurred when atrial rate decreased. We provide detailed descriptions of the electrocardiogram and intracardiac electrogram...
May 2018: Journal of Electrocardiology
Taishi Matsui, Ryo Shinozaki, Eiichi Watanabe, Yoshifusa Aizawa
Differences in successive R-R intervals (RRIs) were normalized by RRIs before and after the indexing beats (normalized DRs) in individuals with normal sinus rhythm (NSR) and 98.89% of normalized DRs were found to distribute within mean±0.100 (≒mean±3SD), whereas 73.47% were out of this range in atrial fibrillation (AF). When 7 out 20 normalized DRs fell outside of 0.000±0.100, NSR (n=129) and AF (n=108) could be discriminated with high sensitivity, specificity, and predictive values (>99.0% for all)...
May 2018: Journal of Electrocardiology
Jesse K Fitzpatrick, Nora Goldschlager
Narrow complex bigeminy is a common electrocardraphic finding that can be caused by second degree sinoatrial exit block or ectopic atrial bigeminy. These rhythms can be very challenging to distinguish on a 12-lead electrocardiogram. In this case of an elderly woman who presented with narrow complex bigeminy, we review the differentiating features of second degree sinoatrial exit block and ectopic atrial bigeminy.
May 2018: Journal of Electrocardiology
Virginia Ruiz Pizarro, Julián Palacios-Rubio, Miguel Ángel Cobos-Gil
No abstract text is available yet for this article.
May 2018: Journal of Electrocardiology
Jana Svehlikova, Michal Teplan, Milan Tysler
The inverse problem of electrocardiography for localization of a premature ventricular contraction (PVC) origin was solved and compared for three types of the equivalent cardiac electrical generator: transmembrane voltages, epicardial potentials, and dipoles. Instead of regularization methods usually used for the ill-posed inverse problems an assumption of a single point source representative of the heart generator was applied to the solution as a geometrical constraint. Body surface potential maps were simulated from eight modeled origins of the PVC in the heart model...
May 2018: Journal of Electrocardiology
Juan Benezet-Mazuecos, José Antonio Iglesias, Juan José de la Vieja, Angel Miracle, Pepa Sanchez-Borque, José Manuel Rubio
We present a case series of five patients reporting abnormal automatic mode switching (AMS) episodes during routinary cardiac defibrillator (ICD) and pacemaker (PM) follow-up. This non-previously described phenomenon was reported to St. Jude Medical (Abbott) Technical Support that confirmed the inappropriate automatic mode switching.
May 2018: Journal of Electrocardiology
Ryo Sasaki, Hisashi Yokoshiki, Yuki Chiba, Motoki Maeno, Hirofumi Mitsuyama, Masaya Watanabe, Taro Tenma, Rui Kamada, Masayuki Takahashi, Minoru Ota
A 78-year old woman with palpitation exhibited an atrial tachycardia (AT) of variable cycle lengths resembling atrial fibrillation (AF). Vague centrifugal activation was noted at the sinus venosa region where overdrive pacing demonstrated entrainment with concealed fusion and the stimulus to P wave approximated the electrogram to the P wave interval of 125ms. Application of radiofrequency energy to this site resulted in termination of the AT as well as formation of a fixed block line manifested by the presence of discrete double potentials...
May 2018: Journal of Electrocardiology
Chenni S Sriram, Mario D Gonzalez
We describe a neonate that developed alternating wide and narrow complex tachycardias following heart surgery for congenital heart defect. Although the etiology was sinus tachycardia, a premature atrial complex initiated aberrancy due to phase 3 block that was perpetuated due to 'linking' at similar or even slower heart rates. Similarly, there was abrupt transition from wide to narrow complex tachycardia following a premature ventricular complex without a change in subsequent heart rate. This was explained by interruption of linking phenomenon by premature ventricular activation...
May 2018: Journal of Electrocardiology
Cecília M Costa, Ittalo S Silva, Rafael D de Sousa, Renato A Hortegal, Carlos Danilo M Regis
Myocardial infarction is one of the leading causes of death worldwide. As it is life threatening, it requires an immediate and precise treatment. Due to this, a growing number of research and innovations in the field of biomedical signal processing is in high demand. This paper proposes the association of Reconstructed Phase Space and Artificial Neural Networks for Vectorcardiography Myocardial Infarction Recognition. The algorithm promotes better results for the box size 10 × 10 and the combination of four parameters: box counting (Vx), box counting (Vz), self-similarity method (Vx) and self-similarity method (Vy) with sensitivity = 92%, specificity = 96% and accuracy = 94%...
May 2018: Journal of Electrocardiology
Hasan Qayyum, Sherif Hemaya, Justin Squires, Zulfiquar Adam
The de Winter ECG pattern is associated with proximal left anterior descending artery occlusion, being a significant risk factor for anterior wall ST elevation myocardial infarction. We present a case of a patient who attended our Emergency Department with chest pain and a prehospital ECG demonstrating transient infero-lateral lead ST segment elevation, which changed to the de Winter ECG pattern in our Emergency Department. She subsequently underwent primary PCI of the culprit lesion within the left anterior descending artery (LAD)...
May 2018: Journal of Electrocardiology
Gary Tse, Mengqi Gong, Lei Meng, Cheuk Wai Wong, Stamatis Georgopoulos, George Bazoukis, Martin C S Wong, Konstantinos P Letsas, Vassilios S Vassiliou, Yunlong Xia, Adrian M Baranchuk, Gan-Xin Yan, Tong Liu
BACKGROUND AND OBJECTIVES: Congenital long QT syndrome (LQTS) predisposes affected individuals to ventricular tachycardia/fibrillation (VF/VF), potentially resulting in sudden cardiac death. The Tpeak -Tend interval and the Tpeak -Tend /QT ratio, electrocardiographic markers of dispersion of ventricular repolarization, were proposed for risk stratification but their predictive values in LQTS have been controversial. A systematic review and meta-analysis was conducted to examine the value of Tpeak -Tend intervals and Tpeak -Tend /QT ratios in predicting arrhythmic and mortality outcomes in congenital LQTS...
May 2018: Journal of Electrocardiology
Hilmi Alnsasra, Binyamin Ben-Avraham, Shmuel Gottlieb, Merav Ben-Avraham, Ran Kronowski, Zaza Iakobishvili, Ilan Goldenberg, Boris Strasberg, Moti Haim
High-grade atrioventricular block (HAVB) is a frequent complication of acute myocardial infarction (AMI) and is associated with increased morbidity and mortality. We aimed to evaluate the incidence, predictors, and prognostic significance of HAVB in a contemporary cohort of patients with AMI, in the recent era of early reperfusion. Patients with acute coronary syndromes (n=11,487) during the years 2000-2010 were included. Patients were divided into two groups: with HAVB (n=308, 2.7%) and without HAVB (n=11,179, 97...
May 2018: Journal of Electrocardiology
Manlio F Márquez
No abstract text is available yet for this article.
May 2018: Journal of Electrocardiology
Nestor Oliveira Neto, Luciano Pilla, William Santos Oliveira, Renata Nunes Velloso, Ferdinand Gilbert Maia, Antonio Luiz do Nascimento, Fabio Mastrocola
No abstract text is available yet for this article.
May 2018: Journal of Electrocardiology
Unzue Leire, García Eulogio, Rodríguez Rodrigo Francisco José, Parra Jiménez Francisco Javier, Medina Peralta Juan, Díaz-Antón Belen, Rodríguez Del Río Miguel, Fontenla Adolfo, Teijeiro Rodrigo, Rubio-Alonso Belén
OBJECTIVES: The aim of this study is to describe electrocardiographic changes and conduction abnormalities in patients undergoing transcatheter aortic valve implantation (TAVI). METHODS: 76 patients who underwent TAVI using Edwards Sapien 3 prosthesis were included, comparing electrocardiographic registries at admission, post-procedure and before discharge. RESULTS: Patients after TAVI presented a longer PR interval, a wider QRS, and a longer corrected QT, with a left deviation of QRS axis and T waves; reversible changes that tended to correct in the following days after TAVI...
May 2018: Journal of Electrocardiology
Xiaohui Ning, Xuerui Ye, Yanhua Si, Zihe Yang, Yunzi Zhao, Qi Sun, Ruohan Chen, Min Tang, Keping Chen, Xiaoli Zhang, Shu Zhang
BACKGROUND: We investigated the prevalence of ventricular tachycardia/ventricular fibrillation (VT/VF) in Post-infarction left ventricular aneurysm (PI-LVA) patients and analyze clinical outcomes in patients presenting with VT/VF. METHODS: 575 PI-LVA patients were enrolled and investigated by logistic regression analysis. Patients with VT/VF were followed up, the composite primary endpoint was cardiac death and appropriate ICD/external shocks. RESULTS: The incidence of sustained VT/VF was 11%...
March 21, 2018: Journal of Electrocardiology
John E Madias
No abstract text is available yet for this article.
March 11, 2018: Journal of Electrocardiology
Krzysztof Boczar, Agnieszka Sławuta, Andrzej Ząbek, Maciej Dębski, Jacek Gajek, Jacek Lelakowski, Barbara Małecka
CRT is a therapeutic option for patients with heart failure, sinus rhythm, prolonged QRS complex duration and reduced ejection fraction. We present a case of 71-year-old woman with dilated cardiomyopathy, NYHA functional class III and AF. We implanted CRT combined with direct His-bundle pacing. The indication for such a therapy was a left bundle branch block with a QRS complex of 178ms and a left ventricular EF of 15%, left ventricular end-diastolic diameter (LVEDD) of 75mm. After 8months of follow-up the LVEDD was 60mm with EF 35-40%...
March 2, 2018: Journal of Electrocardiology
Laszlo Littmann, Kyle M Roedersheimer
No abstract text is available yet for this article.
March 2018: Journal of Electrocardiology
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