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Annals of Noninvasive Electrocardiology

Daniel Cortez, Nandita Sharma, Pei-Ni Jone
BACKGROUND: Kawasaki disease (KD) is the leading cause of acquired heart disease in children. Signal average electrocardiogram changes in patients during the acute phase of KD with coronary artery anomalies (CAA) include depolarization changes. We set out to determine if 12-lead-derived atrioventricular depolarization differences can identify CAA in patients with KD. METHODS: A blinded, retrospective case-control study of patients with KD was performed. Deep Q waves, corrected QT-intervals (QTc), spatial QRS-T angles, T-wave vector magnitudes (RMS-T), and a novel parameter for assessment of atrioventricular depolarization difference (the spatial PR angle) and a two dimensional PR angle were assessed...
September 28, 2016: Annals of Noninvasive Electrocardiology
Usama A Daimee, Yitschak Biton, Arthur J Moss, Wojciech Zareba, David Cannom, Helmut Klein, Scott Solomon, Martin H Ruwald, Scott McNitt, Bronislava Polonsky, Paul J Wang, Ilan Goldenberg, Valentina Kutyifa
BACKGROUND: The effect of chronic kidney disease (CKD) on benefit from cardiac resynchronization therapy with defibrillator (CRT-D) in reducing ventricular tachyarrhythmia (VTA) risk among mild heart failure (HF) patients is not well understood. METHODS: We evaluated the impact of baseline renal function on VTAs in 1274 left bundle branch block (LBBB) patients enrolled in MADIT-CRT. Two prespecified subgroups were created based on estimated glomerular filtration rate (GFR): GFR <60 (n = 413) and GFR ≥60 ml/min/1...
September 15, 2016: Annals of Noninvasive Electrocardiology
Samantha Britton, Raimundo Barbosa-Barros, Bryce Alexander, Adrian Baranchuk
Progressive interatrial block is a clinically significant condition that has previously been reported in various patient populations. It is a manifestation of progressive fibrosis affecting the Bachmann region. This report presents a case of progressive interatrial block associated with atrial fibrillation in the context of hypertrophic cardiomyopathy.
September 11, 2016: Annals of Noninvasive Electrocardiology
Sten Östenson, Valentina D A Corino, Jonas Carlsson, Pyotr G Platonov
BACKGROUND: Changes in the autonomic nervous system (ANS) tone are present before, during, and after episodes of atrial fibrillation (AF). Atrial fibrillatory rate (AFR, the inverse of the atrial cycle length) has been used as a surrogate marker for local refractoriness and is a key characteristic of the fibrillatory process in patients with AF. Aim of this study is to assess changes in AFR, as an effect of autonomic balance change. METHODS: Forty patients undergoing cardiac cardioversion for symptomatic persistent AF were included in the study...
September 9, 2016: Annals of Noninvasive Electrocardiology
Sonia Ferretto, Elvin Tafciu, Immacolata Giuliani, Giuseppe Feltrin, Tomaso Bottio, Antonio Gambino, Angela Fraiese, Sabino Iliceto, Gino Gerosa, Loira Leoni
BACKGROUND: Causes and significance of interventricular conduction disorders (IVCDs) after orthotopic heart transplantation (OHT) are still unknown. METHODS: We retrospectively researched the presence of IVCDs in 240 patients who underwent bicaval OHT in three time periods: at day 1, after 1 year, and after 3 years from OHT. To evaluate the impact of the surgical technique, a control population treated with biatrial anastomosis was used. RESULTS: The most common IVCD was right bundle branch block (RBBB)...
September 9, 2016: Annals of Noninvasive Electrocardiology
Piotr Kukla, Monika Kulik, Marek Jastrzębski, Leszek Bryniarski, Danuta Czarnecka, Adrian Baranchuk
Hypocalcemia is mainly the consequence of hypoalbuminemia, advanced renal impairment, cirrhosis, malnutrition, or sepsis. The most common ECG manifestation of hypocalcemia is QT prolongation as a result of ST segment lengthening. Very occasionally, hypocalcemia can manifest with ST segment elevation forcing the differential diagnosis with ST elevation MI. We described a case of severe hypocalcemia manifesting in electrocardiogram with a J point elevation, absent of ST segment and with associated short QT interval mimicking acute myocardial infarction...
September 7, 2016: Annals of Noninvasive Electrocardiology
Xiaojuan Xia, Anne-Christine Ruwald, Martin H Ruwald, Nene Ugoeke, Barbara Szepietowska, Valentina Kutyifa, Mehmet K Aktas, Poul Erik B Thomsen, Wojciech Zareba, Arthur J Moss, Jean-Philippe Couderc
AIMS: Strict left bundle branch block (LBBB) criteria were recently proposed to identify LBBB patients to benefit most from cardiac resynchronization therapy (CRT). The aim of our study was to automate identification of strict LBBB in order to facilitate its broader application. METHODS: We developed a series of algorithms to automatically detect and measure parameters required for strict LBBB criteria and proposed a definition of QRS notch detection. The algorithms were developed using training (n = 20) and validation (n = 592) sets consisting of signal-averaged 12-lead ECGs (1,000 Hz sampling) recorded from 612 LBBB patients from Multicenter Automatic Defibrillator Implantation Trial-CRT...
August 30, 2016: Annals of Noninvasive Electrocardiology
Sophie Van Malderen, Sip Wijchers, Ferdi Akca, Kadir Caliskan, Tamas Szili-Torok
BACKGROUND: Noncompaction cardiomyopathy (NCCM) is considered to be the result of an arrest in the normal myocardial embryogenesis. The histological, developmental, and electrophysiological explanation of ventricular arrhythmias in NCCM is still unknown. The aim of this study was to determine the origin of premature ventricular contractions (PVCs) in NCCM and to identify any predominant arrhythmic foci. METHODS: Retrospective data from our NCCM registry including 101 patients were analyzed...
August 29, 2016: Annals of Noninvasive Electrocardiology
Harilaos Bogossian, Gerrit Frommeyer, Ilias Ninios, Eleni Pechlivanidou, Fuad Hasan, Quy Suu Nguyen, Dejan Mijic, Axel Kloppe, Zana Karosiene, Artak Margkarian, Dirk Bandorski, Dominik Schultes, Damir Erkapic, Melchior Seyfarth, Bernd Lemke, Lars Eckardt, Markus Zarse
BACKGROUND: The evaluation of the QT interval in the presence of left bundle branch block (LBBB) is associated with the challenge to discriminate native QT interval from the prolongation due to the increase in QRS duration. The newest formula to evaluate QT interval in the presence of LBBB suggests: modified QT during LBBB = measured QT interval minus 50% of LBBB duration. The purpose of this study is therefore to validate the abovementioned formula in the clinical setting. METHODS: Validation in two separate groups of patients: Patients who alternated between narrow QRS and intermittent LBBB and patients with narrow QRS who developed LBBB after transcatheter aortic valve implantation (TAVI)...
August 26, 2016: Annals of Noninvasive Electrocardiology
Harsh Agrawal, Kul Aggarwal, Martin A Alpert
Atrial standstill is a rare disorder of cardiac rhythm that is characterized by total absence of electrical activity in one or both atria. We report herein the case of a patient with atrial fibrillation and symptomatic 4.0 s pauses who received a ventricular demand pacemaker. The patient later underwent mitral valve replacement with a pericardial tissue valve and the Cox-maze III procedure for symptomatic mitral stenosis and atrial fibrillation. Following surgery, he developed atrial standstill and became pacemaker dependent...
August 25, 2016: Annals of Noninvasive Electrocardiology
Tongtong Shen, Binbin Yuan, Jie Geng, Chun Chen, Xiujuan Zhou, Qijun Shan
BACKGROUND: Only implantable cardioverter defibrillators (ICD) have been proven to prevent sudden cardiac death (SCD) in patients with Brugada syndrome (BrS). However, ICD discharge, whether appropriate or inappropriate, leads to impaired quality of life and even increases rehospitalization. Quinidine might prevent the recurrence of ventricular arrhythmia (VA); however, the effect of low-dose quinidine for preventing spontaneous arrhythmias remains less clear. METHODS: In our cardiology center, 10 confirmed patients with BrS (all men, mean age 38...
August 23, 2016: Annals of Noninvasive Electrocardiology
Gary Tse, Bryan P Yan
No abstract text is available yet for this article.
August 18, 2016: Annals of Noninvasive Electrocardiology
Leili Pourafkari, Arezou Tajlil, Nader D Nader
No abstract text is available yet for this article.
August 18, 2016: Annals of Noninvasive Electrocardiology
Richard Petersson, Henrik Mosén, Katarina Steding-Ehrenborg, Jonas Carlson, Lisa Faxén, Alan Mohtadi, Pyotr G Platonov, Fredrik Holmqvist
BACKGROUND: It has previously been demonstrated that orthogonal P-wave morphology in healthy athletes does not depend on atrial size, but the possible impact of left atrial orientation on P-wave morphology remains unknown. In this study, we investigated if left atrial transverse orientation affects P-wave morphology in different populations. METHODS: Forty-seven patients with atrial fibrillation, 21 patients with arrhythmogenic right ventricular cardiomyopathy, 67 healthy athletes, and 56 healthy volunteers were included...
August 17, 2016: Annals of Noninvasive Electrocardiology
Hanumantha R Jogu, Wesley T O'Neal, Stephen T Broughton, Amit J Shah, Zhu-Ming Zhang, Elsayed Z Soliman
BACKGROUND: Frontal QRS-T angle reflects changes in regional action potential duration and the direction of repolarization. Although it has been suggested that abnormal ventricular repolarization predisposes to atrial arrhythmias, it is unknown whether abnormal frontal QRS-T angle is associated with an increased risk of atrial fibrillation (AF). METHODS: We examined the association between frontal QRS-T angle and AF in 4282 participants (95% white; 41% male) from the Cardiovascular Health Study (CHS)...
August 12, 2016: Annals of Noninvasive Electrocardiology
José M Montero Cabezas, Ioannis Karalis, Martin J Schalij
The electrocardiographic pattern consisting of ST-segment depression and hyperacute T waves in patients with acute chest pain, known as "De Winter pattern," has been related with the occlusion of the proximal left anterior descending artery (LAD). The association of these findings with the involvement of a different coronary artery has not been described. We present a 53-year-old patient with an occlusion of the first diagonal branch and an electrocardiogram showing a "De Winter pattern." The reported case demonstrates that "De Winter pattern" is not exclusively associated with the occlusion of the proximal segment of the LAD...
September 2016: Annals of Noninvasive Electrocardiology
Barış Güngör, Kazım S Özcan, Mehmet B Karataş, İrfan Şahin, Recep Öztürk, Osman Bolca
No abstract text is available yet for this article.
September 2016: Annals of Noninvasive Electrocardiology
Zulkif Tanriverdi, Huseyin Dursun, Tugce Colluoglu, Dayimi Kaya
No abstract text is available yet for this article.
September 2016: Annals of Noninvasive Electrocardiology
Marco Marano, Anna D'Amato, Alessandra Cantone
A chronic hemodialysis patient-known to have advanced interatrial block (IAB)-had reported symptoms suggesting arrhythmias, hence she underwent hemodialysis treatment while on the cardiac monitor. This allowed us to recognize the occurrence of paroxysmal atrial fibrillation and, in turn, disclose the first case of Bayés syndrome. Even though atrial fibrillation and IAB are very frequent in hemodialysis patients, Bayés syndrome, that comprehends both, has never been described, likely because the IAB is often overlooked and undiagnosed...
September 2016: Annals of Noninvasive Electrocardiology
Petros Arsenos, George Manis, Konstantinos A Gatzoulis, Polychronis Dilaveris, Theodoros Gialernios, Athanasios Angelis, Achileas Papadopoulos, Erifili Venieri, Athanasios Trikas, Dimitris Tousoulis
BACKGROUND: Deceleration capacity (DC) of heart rate proved an independent mortality predictor in postmyocardial infarction patients. The original method (DCorig) may produce negative values (9% in our analyzed sample). We aimed to improve the method and to investigate if DC also predicts the arrhythmic mortality. METHODS: Time series from 221 heart failure patients was analyzed with DCorig and a new variant, the DCsgn, in which decelerations are characterized based on windows of four consecutive beats and not on anchors...
September 2016: Annals of Noninvasive Electrocardiology
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