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Premature ventricular contraction

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https://www.readbyqxmd.com/read/29145270/study-on-the-adverse-effects-following-chemotherapy-for-breast-cancer-diagnosis-during-pregnancy-the-first-case-report-in-china
#1
Xin Ye, Qi He, Xiaoyun Zhou
RATIONALE: Treatment of breast cancer during pregnancy (BCP) remains a challenge to physicians. Surgery and chemotherapy during pregnancy are widely used for the treatment of BCP. Herein, we reported 3 Chinese patients with BCP who underwent chemotherapy during pregnancy and were followed up for adverse effects. PATIENT CONCERNS: Three female patients (case 1, case 2, and case 3) of 37-, 32-, and 28-year-old with breast masses were enrolled. Case 1 had been pregnant for over 4 months, case 2 over 7 months, and case 3 for 7 months...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145266/catheter-ablation-of-ventricular-arrhythmia-originating-from-isolated-outflow-tract-diverticulum-two-case-reports-and-literature-review
#2
Xinbin Zhou, Haibin Xu, Zhijun Wang
RATIONALE: Congenital ventricular diverticulum is a rare cardiac malformation with a prevalence of about 0.26% in unselected adult patients during other diagnostic procedures. Ventricular arrhythmia originating from outflow tract diverticulum is even rarer and its etiology, epidemiology and proper treatment still remain controversial. PATIENT CONCERNS: We present 2 cases of isolated outflow tract diverticulum incidentally revealed by cardiac angiography during catheter ablation for ventricular arrhythmia...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29130071/the-electrophysiological-substrate-of-early-repolarization-syndrome-noninvasive-mapping-in-patients
#3
Junjie Zhang, Mélèze Hocini, Maria Strom, Phillip S Cuculich, Daniel H Cooper, Frédéric Sacher, Michel Haïssaguerre, Yoram Rudy
Background: The early repolarization (ER) pattern is a common ECG finding. Recent studies established a definitive clinical association between ER and fatal ventricular arrhythmias. However, the arrhythmogenic substrate of ER in the intact human heart has not been characterized. Objectives: To map the epicardial electrophysiological (EP) substrate in ER syndrome patients using noninvasive Electrocardiographic Imaging (ECGI), and to characterize substrate properties that support arrhythmogenicity...
August 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29110996/atrial-ectopy-as-a-mediator-of-the-association-between-race-and-atrial-fibrillation
#4
Matthew A Christensen, Kaylin T Nguyen, Phyllis K Stein, Raymond B Fohtung, Elsayed Z Soliman, Thomas A Dewland, Eric Vittinghoff, Bruce M Psaty, Susan R Heckbert, Gregory M Marcus
BACKGROUND: Blacks have a lower risk of atrial fibrillation (AF) despite having more AF risk factors, but the mechanism remains unknown. Premature atrial contraction (PAC) burden is a recently identified risk factor for AF. OBJECTIVE: The purpose of this study was to determine whether the burden of PACs explains racial differences in AF risk. METHODS: PAC burden (number per hour) was assessed by 24-hour ambulatory electrocardiographic (ECG) monitoring in a randomly selected subset of patients in the Cardiovascular Health Study...
October 23, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29093384/a-pilot-study-of-tranilast-for-cardiomyopathy-of-muscular-dystrophy
#5
Tsuyoshi Matsumura, Misa Matsui, Yuko Iwata, Masanori Asakura, Toshio Saito, Harutoshi Fujimura, Saburo Sakoda
Objective Heart failure is currently the most serious complication of muscular dystrophy. The transient receptor potential cation channel, subfamily V, member 2 (TRPV2) is a stretch-sensitive Ca channel. In damaged myocytes or cardiomyocytes, TRPV2 translocates to the cytoplasmic membrane and enhances Ca influx, triggering cell damage. Evidence suggests that the inhibition of TRPV2 may be a new therapeutic target in heart failure. We found that tranilast, which is widely used as an anti-allergic drug, inhibits TRPV2...
November 1, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29071387/-ventricular-arrhythmias-what-has-been-confirmed-in-therapy
#6
REVIEW
D Duncker, J Bauersachs, C Veltmann
Ventricular arrhythmias include a wide range of potentially benign single ventricular premature contractions to ventricular tachycardia and ventricular fibrillation with a risk for sudden cardiac death. The diagnosis of ventricular arrhythmia is made by 12-lead electrocardiogram, 24 h Holter monitoring, an external or implantable loop recorder, or during in-hospital monitoring. Especially the diagnosis of wide complex tachycardias is challenging in terms of differentiating between ventricular tachycardia and supraventricular tachycardia with aberrant atrioventricular conduction...
October 25, 2017: Der Internist
https://www.readbyqxmd.com/read/29067911/syncope-in-a-young-man-role-of-purkinje-fibres-in-idiopathic-ventricular-fibrillation
#7
Claire A Martin, Laurence Nunn, Pier D Lambiase
A young man suffered cardiac arrests with polymorphic ventricular tachycardia (PVT) and ventricular fibrillation (VF) triggered by ventricular premature contractions (PVCs). The arrhythmia was resistant to anti-arrhythmics, so after ICD implantation he underwent successful ablation of the triggering VE beat, which was pace-mapped to the left posterior hemi-fascicle. We review the evidence for the role of the Purkinje network in the initiation and maintenance of PVT and VF, postulating a channelopathy as a possible underlying cause, and provide recommendations for PVC ablation...
July 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29064791/effect-of-quercetin-on-parameters-of-central-hemodynamics-and-myocardial-ischemia-in-patients-with-stable-coronary-heart-disease
#8
Natalia I Chekalina, Svitlana V Shut, Tetiana A Trybrat, Yurii H Burmak, Yeuhen Ye Petrov, Yulia I Manusha, Yurii M Kazakov
THE AIM: The aim of our research was to study the effect of quercetin on parameters of central hemodynamics and myocardial ischemia in patients with stable coronary heart disease (CHD). MATERIAL AND METHODS: The research involved 85 patients with CHD: stable angina pectoris, FC II, and 30 healthy individuals made up the control group. After 1.5 months of stabilizing therapy (ß-blockers, statins, aspirin) patients with CHD were randomized into 2 groups - the research group (30 people) and the comparison group (55 people)...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29060910/an-autonomous-medical-monitoring-system-validation-on-arrhythmia-detection
#9
A Lemkaddem, M Proenca, R Delgado-Gonzalo, Ph Renevey, I Oei, G Montano, J A Martinez-Heras, A Donati, M Bertschi, M Lemay
In this paper, we present a generic platform for autonomous medical monitoring and diagnostics. We validated the platform in the context of arrhythmia detection with publicly available databases. The big advantage of this platform is its capacity to deal with various types of physiological signals. Many pre-processing steps are performed to bring the input information into a uniform state that will be explored by a machine learning algorithm. Since this block plays a crucial role in the entire processing pipeline, three different methods were evaluated for detection and classification of anomalies...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059644/resveratrol-has-a-positive-effect-on-parameters-of-central-hemodynamics-and-myocardial-ischemia-in-patients-with-stable-coronary-heart-disease
#10
Nataliya I Chekalina
INTRODUCTION: Cardiovascular diseases, and primarily coronary heart disease (CHD), are the leading cause of mortality in the developing countries, including Ukraine. Prognosis for patients with CHD depends mainly on progression of coronary atherosclerosis (ASVD). Molecular mechanisms of atherogenesis are studied in detail in order to find new targets of pharmacological intervention. THE AIM: to study the effect of resveratrol on parameters of central hemodynamics and myocardial ischemia in patients with stable coronary heart disease (CHD)...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29056132/nedaplatin-induced-arrhythmia-retrospective-analysis-of-three-cases
#11
Ying-Jie Song, Tao Fan, Chang-Yin Quan, Sheng-Hua Cao, Yuan Zhang, Xin-Hong Shao
Nedaplatin (NDP) is a second-generation platinum derivative that was developed in Japan. Nowadays, it is being widely used in the management of lung cancer, esophageal cancer, head and neck cancers, especially when cisplatin and carboplatin cannot be tolerated or show drug resistance. To the best of our knowledge, there are few reported cases of NDP-induced bradycardia in the relevant medical literature. The current report presents three patients treated with NDP chemotherapy-induced serious arrhythmias. The three cases developed sinus tachycardia and atrial premature beats, complete left bundle branch block, and bigeminy ventricular premature contraction, in the second, sixth and second cycle, respectively...
October 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29054937/learning-from-errors-unnecessary-intensive-care-unit-admissions
#12
Cecil A Rambarat, David E Winchester
An elderly man was transferred to our emergency department with reported ventricular tachycardia requiring intravenous amiodarone and intensive care unit admission. Device interrogation, the following day, revealed only frequent premature ventricular contractions and non-sustained ventricular tachycardia in a patient with a known history of these conditions. The patient underwent unnecessary invasive monitoring after being emergently transferred to our facility and admitted to the intensive care unit. Fortunately, our patient did not suffer any unwarranted side effects from intravenous amiodarone...
October 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29046176/dysrhythmias-in-laypersons-during-centrifuge-simulated-suborbital-spaceflight
#13
Rahul Suresh, Rebecca S Blue, Charles H Mathers, Tarah L Castleberry, James M Vanderploeg
INTRODUCTION: There are limited data on cardiac dysrhythmias in laypersons during hypergravity exposure. We report layperson electrocardiograph (ECG) findings and tolerance of dysrhythmias during centrifuge-simulated suborbital spaceflight. METHODS: Volunteers participated in varied-length centrifuge training programs of 2-7 centrifuge runs over 0.5-2 d, culminating in two simulated suborbital spaceflights of combined +Gz and +Gx (peak +4.0 Gz, +6.0 Gx, duration 5 s)...
November 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29021847/a-new-mapping-method-to-estimate-exit-sites-of-ventricular-arrhythmias-using-intracardiac-echocardiography-and-m-mode-for-catheter-ablation
#14
Osamu Inaba, Junichi Nitta, Syunsuke Kuroda, Masahiro Sekigawa, Masahito Suzuki, Yukihiro Inamura, Akira Satoh, Mitsuaki Isobe, Kenzo Hirao
BACKGROUND: Catheter ablation of premature ventricular complexes (PVCs) has been used as a curative therapy in many cases. Intracardiac ultrasound with a magnetic sensor probe has recently become available for catheter ablation. In this study, we assessed a new mapping method, contraction mapping, for determining the optimal ablation sites using intracardiac ultrasound and M-mode. This study sought to assess the accuracy of the new mapping method using intracardiac echocardiography. METHODS: Eighteen patients (10 males and eight females; mean age, 63±12 years) with 104 mapping points diagnosed as idiopathic PVCs were included in this study...
October 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28990947/ablation-of-epicardial-premature-ventricular-contractions-in-a-patient-with-ischemic-cardiomyopathy-and-implementation-of-cardiac-resynchronization-therapy-in-the-same-procedure
#15
Veysel Kutay Vurgun, Başar Candemir, Ali Timuçin Altın, Ömer Akyürek
Premature ventricular contractions (PVCs) can cause clinical deterioration in patients with heart failure and increase the frequency of shocks delivered by an implantable cardioverter defibrillator (ICD). Epicardial PVC/ventricular tachycardia (VT) is seen less often in ischemic cardiomyopathy. Radiofrequency catheter ablation is the most effective treatment option for the management of PVC/VT and can improve cardiac function. Presently described is a patient with ischemic cardiomyopathy and frequent PVCs and VT runs with multiple ICD therapies who was treated with simultaneous radiofrequency catheter ablation in the anterior interventricular vein and cardiac resynchronization therapy defibrillator upgrade in the same procedure...
October 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28990149/management-of-arrhythmias-in-athletes-atrial-fibrillation-premature-ventricular-contractions-and-ventricular-tachycardia
#16
REVIEW
Ernest Lai, Eugene H Chung
Management of atrial fibrillation, premature ventricular contractions, and ventricular tachycardia without underlying cardiac disease or arrhythmogenic conditions differs in athletes from the general population. Athletes tend to be younger, healthier individuals with few comorbidities. Therapies that work well in the general population may not be appropriate or preferable for athletes. Management strategies include deconditioning, pharmacologic therapy, such as rate control with β-blockers or non-dihydropyridine calcium channel blockers and rhythm control with class I or class III antiarrhythmic drugs, and catheter ablation...
October 9, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28976307/three-dimensional-noninvasive-imaging-of-ventricular-arrhythmias-in-patients-with-premature-ventricular-contractions
#17
Long Yu, Qi Jin, Zhaoye Zhou, Liqun Wu, Bin He
OBJECTIVE: Noninvasive imaging of cardiac electrical activity promises to provide important information regarding the underlying arrhythmic substrates for successful ablation intervention and further understanding of the mechanism of such lethal disease. The aim of this study is to evaluate the performance of a novel three-dimensional (3D) cardiac activation imaging technique to noninvasively localize and image origins of focal ventricular arrhythmias in patients undergoing radio frequency ablation...
October 2, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28966313/analysis-of-morphological-characteristics-and-origins-of-idiopathic-premature-ventricular-contractions-under-a-12-lead-electrocardiogram-in-children-with-structurally-normal-hearts
#18
Jianbin Jiang, Yuee He, Huixian Qiu, Yuanhai Zhang, Maoping Chu, Yuechun Li, Qi Chen
Up to 40% of healthy children have premature ventricular complexes or contractions (PVCs) detected with 24-hour Holter monitoring. We aimed to investigate the morphological characteristics and origins of idiopathic PVCs under a 12-lead electrocardiogram in children with structurally normal hearts. All asymptomatic monomorphic PVC patients with structurally normal hearts under 18 years of age were included in this retrospective study. Characteristics of PVCs in lead V1 under a 12-lead electrocardiogram were classified as left bundle branch block (PVC-LBBB) or right bundle branch block (PVC-RBBB)...
October 21, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28964134/extremes-of-fractional-noises-a-model-for-the-timings-of-arrhythmic-heart-beats-in-post-infarction-patients
#19
Annette Witt, Frithjof Ehlers, Stefan Luther
We have analyzed symbol sequences of heart beat annotations obtained from 24-h electrocardiogram recordings of 184 post-infarction patients (from the Cardiac Arrhythmia Suppression Trial database, CAST). In the symbol sequences, each heart beat was coded as an arrhythmic or as a normal beat. The symbol sequences were analyzed with a model-based approach which relies on two-parametric peaks over the threshold (POT) model, interpreting each premature ventricular contraction (PVC) as an extreme event. For the POT model, we explored (i) the Shannon entropy which was estimated in terms of the Lempel-Ziv complexity, (ii) the shape parameter of the Weibull distribution that best fits the PVC return times, and (iii) the strength of long-range correlations quantified by detrended fluctuation analysis (DFA) for the two-dimensional parameter space...
September 2017: Chaos
https://www.readbyqxmd.com/read/28958795/heart-rate-turbulence-after-ventricular-premature-beats-in-healthy-doberman-pinschers-and-those-with-dilated-cardiomyopathy
#20
J D Harris, C J L Little, J M Dennis, M W Patteson
OBJECTIVES: To describe the measurement of heart rate turbulence (HRT) after ventricular premature beats and compare HRT in healthy Doberman pinschers and those with dilated cardiomyopathy (DCM), with and without congestive heart failure (CHF). ANIMALS: Sixty-five client-owned Dobermans: 20 healthy (NORMAL), 31 with preclinical DCM and 14 with DCM and CHF (DCM + CHF). METHODS: A retrospective study of data retrieved from clinical records and ambulatory ECG (Holter) archives, including data collected previously for a large-scale prospective study of Dobermans with preclinical DCM...
October 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
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