Reentrant atrial tachycardia originating from the sinus venosa region
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. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 5, 2018 Category: Cardiology Authors: Ryo Sasaki, Hisashi Yokoshiki, Yuki Chiba, Motoki Maeno, Hirofumi Mitsuyama, Masaya Watanabe, Taro Tenma, Rui Kamada, Masayuki Takahashi, Minoru Ota Source Type: research
Reentrant atrial tachycardia originating from the sinus venosa region
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 125 ms. 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. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 5, 2018 Category: Cardiology Authors: Ryo Sasaki, Hisashi Yokoshiki, Yuki Chiba, Motoki Maeno, Hirofumi Mitsuyama, Masaya Watanabe, Taro Tenma, Rui Kamada, Masayuki Takahashi, Minoru Ota Source Type: research
Inappropriate automatic mode switching episodes: What's the mechanism?
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. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 2, 2018 Category: Cardiology Authors: Juan Benezet-Mazuecos, Jos é Antonio Iglesias, Juan José de la Vieja, Angel Miracle, Pepa Sanchez-Borque, José Manuel Rubio Source Type: research
Repolarization time in presence of intraventricular conduction disturbances. A new solution for an old problem
Although the QT interval is used as a surrogate parameter of ventricular repolarization, it actually includes both process of ventricular activity: depolarization, represented in the ECG by the QRS complex, and repolarization, represented by the ST segment and T wave [1]. For this reason, not only a slowing (prolongation) of the repolarization may be able to prolong the QT interval, but also a widening of the QRS complex is able to increase that value without representing any repolarization anomaly. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 2, 2018 Category: Cardiology Authors: Manlio F. M árquez Source Type: research
Cardiac resynchronization therapy with His bundle pacing as a method of treatment of chronic heart failure in patients with permanent atrial fibrillation and left bundle branch block
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%. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 2, 2018 Category: Cardiology Authors: Krzysztof Boczar, Agnieszka S ławuta, Andrzej Ząbek, Maciej Dębski, Jacek Gajek, Jacek Lelakowski, Barbara Małecka Source Type: research
Inappropriate automatic mode switching episodes: What's the mechanism?
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. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 2, 2018 Category: Cardiology Authors: Juan Benezet-Mazuecos, Jos é Antonio Iglesias, Juan José de la Vieja, Angel Miracle, Pepa Sanchez-Borque, José Manuel Rubio Source Type: research
Repolarization time in presence of intraventricular conduction disturbances. A new solution for an old problem
Although the QT interval is used as a surrogate parameter of ventricular repolarization, it actually includes both process of ventricular activity: depolarization, represented in the ECG by the QRS complex, and repolarization, represented by the ST segment and T wave [1]. For this reason, not only a slowing (prolongation) of the repolarization may be able to prolong the QT interval, but also a widening of the QRS complex is able to increase that value without representing any repolarization anomaly. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 2, 2018 Category: Cardiology Authors: Manlio Marquez Source Type: research
Cardiac resynchronization therapy with His bundle pacing as a method of treatment of chronic heart failure in patients with permanent atrial fibrillation and left bundle branch block
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 178 ms and a left ventricular EF of 15%, left ventricular end-diastolic diameter (LVEDD) of 75 mm. After 8 months of follow-up the LVEDD was 60 mm with EF 35–40%. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 2, 2018 Category: Cardiology Authors: Krzysztof Boczar, Agnieszka S ławuta, Andrzej Ząbek, Maciej Dębski, Jacek Gajek, Jacek Lelakowski, Barbara Małecka Source Type: research
Geometrical constraint of sources in noninvasive localization of premature ventricular contractions
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. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 1, 2018 Category: Cardiology Authors: Jana Svehlikova, Michal Teplan, Milan Tysler Source Type: research
Editorial Board
(Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 1, 2018 Category: Cardiology Source Type: research
Geometrical constraint of sources in noninvasive localization of premature ventricular contractions
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. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - March 1, 2018 Category: Cardiology Authors: Jana Svehlikova, Michal Teplan, Milan Tysler Source Type: research
A successful catheter ablation of a ventricular fibrillation
Malignant ventricular arrhythmias are challenging to manage, requiring a multidisciplinary approach. The mechanism, which triggers ventricular fibrillation (VF) associated with ventricular extrasystoles has not been clarified yet, however, abolishing ventricular extrasystoles may stop ventricular fibrillation in these patients. By this case presentation, we aimed to present a successful treatment of an electrical storm (ES), which developed after an acute myocardial infarction, by catheter ablation. (Source: Journal of Electrocardiology)
Source: Journal of Electrocardiology - February 23, 2018 Category: Cardiology Authors: Serdar Demir, Abdulkadir Uslu, Ahmet Guner, Sabahattin Gunduz, Muzaffer Kahyaoglu, Ayhan Kup, Mehmet Celik, Ozge Akgun, Munevver Sar ı, Taylan Akgun Source Type: research
Computerized interpretation of electrocardiograms: Taking stock and implementing new knowledge
After reading the superb review by Schl äpfer and Wellens [1] about computer interpreted electrocardiograms (CIE), I thought that in essence the content of their contribution mainly pertain to the readers and authors of the Journal of Electrocardiology, and the members of the International Society of Computerized Electrocardiology, and t he International Society of Electrocardiology, from whom action is expected to improve the current status of CIE. The authors called for international standardization of electrocardiogram (ECG) measurements, cross-talk among ECG machine manufacturers, and harmonization of diagnostic crite...
Source: Journal of Electrocardiology - February 22, 2018 Category: Cardiology Authors: John E. Madias Source Type: research
