keyword
https://read.qxmd.com/read/38536171/a-revised-definition-of-left-bundle-branch-block-using-time-to-notch-in-lead-i
#1
JOURNAL ARTICLE
Jeremy S Treger, Ahmad B Allaw, Pouyan Razminia, Dipayon Roy, Amulya Gampa, Swati Rao, Andrew D Beaser, Srinath Yeshwant, Zaid Aziz, Cevher Ozcan, Gaurav A Upadhyay
IMPORTANCE: Current left bundle branch block (LBBB) criteria are based on animal experiments or mathematical models of cardiac tissue conduction and may misclassify patients. Improved criteria would impact referral decisions and device type for cardiac resynchronization therapy. OBJECTIVE: To develop a simple new criterion for LBBB based on electrophysiological studies of human patients, and then to validate this criterion in an independent population. DESIGN, SETTING, AND PARTICIPANTS: In this diagnostic study, the derivation cohort was from a single-center, prospective study of patients undergoing electrophysiological study from March 2016 through November 2019...
March 27, 2024: JAMA Cardiology
https://read.qxmd.com/read/38531333/long-term-impact-of-left-bundle-branch-block-on-cardiopulmonary-exercise-test-variables-and-left-ventricular-systolic-function-a-two-stage-observational-study
#2
Alícia Caine Melo Santos, Enaldo Vieira de Melo, Antônio Carlos Sobral Sousa, Joselina Luzia Menezes Oliveira, Paulo Ricardo Martins-Filho, Nathalia Costa Macedo Noronha, Carmem Isaura Salles do Nascimento, Milena Dos Santos Barros Campos
INTRODUCTION: Left bundle branch block (LBBB) disrupts the electrical activation of the left ventricle (LV), potentially impairing its systolic function, leading to LBBB-induced cardiomyopathy. This study examined cardiopulmonary exercise test (CPET) variables in patients with and without LBBB and assessed the longitudinal development of left ventricular ejection fraction (LVEF). METHOD: An observational, comparative clinical study was executed in two stages at a private hospital in Brazil...
March 26, 2024: Cardiology
https://read.qxmd.com/read/38529807/different-methods-of-3d-qrs-area-calculation-from-vectorcardiographic-x-y-and-z-leads
#3
JOURNAL ARTICLE
Amit Noheria, Christian Toquica, Uzair A Mahmood, Ashley DeBauge, Tucker Morey, Christopher J Harvey
3DQRSarea is a strong marker for cardiac resynchronization therapy and can be obtained by taking the (i) summation or the (ii) difference of the areas subtended by positive and negative deflections in X, Y, Z vectorcardiographic electrocardiogram (ECG) leads. We correlated both methods with the instantaneous-absolute-3D-voltage-time-integral (VTIQRS-3D ). 3DQRSarea consistently underestimated the VTIQRS -3D , but the summation method was a closer and more reliable approximation. The dissimilarity was less apparent in left bundle branch block (r2 summation ...
March 26, 2024: Pacing and Clinical Electrophysiology: PACE
https://read.qxmd.com/read/38527508/-diagnosis-and-treatment-of-arrhythmogenic-cardiomyopathy-in-children
#4
JOURNAL ARTICLE
W Q Ye, Y Y Xiao, X K Jiang, M Jin, X F Wang, W W Ding
Objective: To summarize the clinical manifestations, experiences in diagnosis and treatment of arrhythmogenic cardiomyopathy (ACM) in children. Methods: A retrospective analysis of the clinical manifestations, laboratory tests, radiological features, treatment and follow-up results was conducted in 11 children diagnosed with ACM at the center of congenital heart disease, Beijing anzhen hospital from May 2010 to March 2022. Results: A total of 11 patients aged 2 to 16 years, including 5 males and 6 females were diagnosed with ACM...
March 25, 2024: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://read.qxmd.com/read/38523980/myocardial-bridging-of-mid-left-anterior-descending-artery-lad-presenting-as-transient-left-bundle-branch-block-during-nuclear-stress-test
#5
Kai Shiang Lin, Adam Kurnick, Ridhima Goel, Igal Gorbut, Adam Friedman, Ezra Schrem, Samy I McFarlane, Inna Bukharovich
Transient left bundle branch block occurring during a nuclear stress test in the setting of myocardial bridging is a relatively rare finding. We report a case of a 75-year-old male who presented with typical stable angina. Serial troponins were negative, and the electrocardiogram revealed normal sinus rhythm with left ventricular hypertrophy and T-wave inversions in the lateral leads. The nuclear stress test was non-ischemic but showed a transient left bundle branch block associated with chest pain and shortness of breath that occurred right after the administration of regadenoson...
February 2024: Curēus
https://read.qxmd.com/read/38519537/prediction-of-pacemaker-induced-cardiomyopathy-using-a-convolutional-neural-network-based-on-clinical-findings-prior-to-pacemaker-implantation
#6
JOURNAL ARTICLE
Mitsunori Oida, Takuya Mizutani, Eriko Hasumi, Katsuhito Fujiu, Kosaku Goto, Kunihiro Kani, Tsukasa Oshima, Takumi J Matsubara, Yu Shimizu, Gaku Oguri, Toshiya Kojima, Issei Komuro
Risk factors for pacemaker-induced cardiomyopathy (PICM) have been previously reported, including a high burden of right ventricular pacing, lower left ventricular ejection fraction, a wide QRS duration, and left bundle branch block before pacemaker implantation (PMI). However, predicting the development of PICM remains challenging. This study aimed to use a convolutional neural network (CNN) model, based on clinical findings before PMI, to predict the development of PICM. Out of a total of 561 patients with dual-chamber PMI, 165 (mean age 71...
March 22, 2024: Scientific Reports
https://read.qxmd.com/read/38513737/clinical-characteristics-treatment-trajectories-and-outcome-of-patients-with-dilated-cardiomyopathy-in-a-national-heart-failure-registry
#7
JOURNAL ARTICLE
Samuela Carigi, Piero Gentile, Mauro Gori, Denitza Tinti, Luisa De Gennaro, Giuseppe Leonardi, Francesco Orso, Anna Rita Felici, Maria Rosaria Catalano, Marina Floresta, Vittoria Rizzello, Donata Lucci, Lucio Gonzini, Renata De Maria, Marco Marini
BACKGROUND: Available data on the clinical characteristics and prognosis of patients with heart failure (HF) due to dilated cardiomyopathy (DCM) derive mainly from tertiary care centres for cardiomyopathies or from drug trial sub-studies, which may entail a referral bias. METHODS: From 2008 to 2021, we enrolled in a nationwide HF Registry 1886 DCM patients and 3899 with ischemic heart disease (IHD). RESULTS: Patients with DCM were younger, more often female, had more commonly recent onset HF, left bundle branch block, and showed higher LV end-diastolic volume and lower LVEF than IHD...
March 19, 2024: International Journal of Cardiology
https://read.qxmd.com/read/38510891/transcatheter-aortic-valve-replacement-tavr-versus-surgical-aortic-valve-replacement-savr-a-review-on-the-length-of-stay-cost-comorbidities-and-procedural-complications
#8
REVIEW
Jonathan Kermanshahchi, Birpartap Thind, Gabriel Davoodpour, Megan Hirsch, Jeff Chen, Akshay J Reddy, Zeyu Yu, Benjamin E Falkenstein, Daryoush Javidi
This review provides an in-depth analysis of the effect of length of stay (LOS), comorbidities, and procedural complications on the cost-effectiveness of transcatheter aortic valve replacement (TAVR) in comparison to surgical aortic valve replacement (SAVR). We found that the average LOS was shorter for patients undergoing TAVR, contributing to lower average costs associated with the procedure, although the LOS varied between patients due to the severity of illness and comorbidities present. TAVR has also been found to improve the quality of life for patients receiving aortic valve replacement compared to SAVR...
February 2024: Curēus
https://read.qxmd.com/read/38510200/clinical-significance-of-regional-constructive-and-wasted-work-in-patients-receiving-cardiac-resynchronization-therapy
#9
JOURNAL ARTICLE
Chun-Li Wang, Lung-Sheng Wu, Chia-Tung Wu, Yung-Hsin Yeh, Yu-Wen Cheng, Kun-Chi Yen, Yi-Hsin Chan, Chi Chuang, Chi-Tai Kuo, Pao-Hsien Chu
BACKGROUND: Previous studies have shown that global constructive work (CW) and wasted work (WW) predict response to cardiac resynchronization therapy (CRT). This study evaluated the predictive value of regional CW and WW for reverse remodeling and clinical outcomes after CRT. METHODS: We performed a prospective study involving 134 CRT candidates with left bundle branch block and left ventricular ejection fraction ≤35%. Global and regional CW and WW were calculated using pressure-strain loop analysis...
2024: Frontiers in Cardiovascular Medicine
https://read.qxmd.com/read/38508435/subclinical-maternal-autoimmune-disease-leading-to-congenital-high-degree-atrioventricular-block-case-report-and-review-of-the-literature
#10
Shelby E Walcott, Dr Christian H Tan, Dr Jason Wicker, Dr Silvio Litovsky
Maternal autoimmune disease is the most common cause of congenital heart block (CHB), a rare illness characterized by fibrosis and calcification of the fetal atrioventricular (AV) node due to maternal autoantibodies anti-SSA/Ro and anti-SSB/La. We report the full autopsy and clinical information on a female neonate with high degree AV block and calcification in the AV node, atrial approaches to the AV node, and both right and left bundle branches, born to a 27-year-old female with subclinical autoimmune disease...
March 18, 2024: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://read.qxmd.com/read/38508296/predictors-of-pacemaker-requirement-in-patients-receiving-implantable-loop-recorders-for-unexplained-syncope-a-systematic-review-and-meta-analysis
#11
JOURNAL ARTICLE
Jeremy William, Shane Nanayakkara, David Chieng, Hariharan Sugumar, Liang-Han Ling, Hitesh Patel, Justin Mariani, Sandeep Prabhu, Peter M Kistler, Aleksandr Voskoboinik
BACKGROUND: Implantable loop recorders (ILR) are increasingly used to evaluate patients with unexplained syncope. Identification of all predictors of bradycardic syncope and consequent permanent pacemaker (PPM) insertion is of substantial clinical interest, as patients in the highest-risk category may benefit from upfront pacemaker insertion. OBJECTIVES: We performed a systematic review and meta-analysis to identify risk predictors for PPM insertion in ILR recipients with unexplained syncope...
March 18, 2024: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://read.qxmd.com/read/38507305/response-predictors-to-cardiac-resynchronization-therapy-in-chronic-heart-failure-a-10-year-cardiovascular-center-experience
#12
JOURNAL ARTICLE
Juan C Plata-Corona, Fabio Solis-Jiménez, Maximiliano Flores-Flamand, Carlos A Dattoli-García, Ángel A Priego-Ranero, Jorge D Sierra-Lara, Carlos R Sierra-Fernández
BACKGROUND: Cardiac resynchronization therapy (CRT) has been established as an effective therapy for heart failure with reduced ejection fraction. Randomized clinical trials have shown its impact on mortality and HF hospitalizations, as well as improvement of symptoms and quality of life. OBJECTIVES: Finding clinical, electrocardiographic, and echocardiographic variables that may predict the response to cardiac resynchronization therapy (CRT). METHODS: We performed a single-center, observational, analytic, and retrospective study that included 102 patients with heart failure (HF) diagnosis who underwent CRT according to guideline-directed therapy from January 2010 to April 2020 in a third-level center...
2024: Archivos de Cardiología de México
https://read.qxmd.com/read/38503487/presence-and-utility-of-electrocardiographic-abnormalities-in-long-term-childhood-cancer-survivors
#13
JOURNAL ARTICLE
Esmée C de Baat, Remy Merkx, Jan M Leerink, Coen Boerhout, Heleen J H van der Pal, Elvira C van Dalen, Jacqueline Loonen, Dorine Bresters, Eline van Dulmen-den Broeder, Margriet van der Heiden-van der Loo, Marry M van den Heuvel, Judith L Kok, Marloes Louwerens, Sebastian J C M M Neggers, Cecline M Ronckers, Jop C Teepen, Wim J E Tissing, Andrica C de Vries, Livia Kapusta, Leontien C M Kremer, Annelies M C Mavinkurve-Groothuis, Wouter E M Kok, Elizabeth A M Feijen
BACKGROUND: We assessed the prevalence and diagnostic value of ECG abnormalities for cardiomyopathy surveillance in childhood cancer survivors. METHODS: In this cross-sectional study, 1381 survivors (≥5 years) from the Dutch Childhood Cancer Survivor Study part 2 and 272 siblings underwent a long-term follow-up ECG and echocardiography. We compared ECG abnormality prevalences using the Minnesota Code between survivors and siblings, and within biplane left ventricular ejection fraction (LVEF) categories...
March 19, 2024: Heart
https://read.qxmd.com/read/38500683/estimating-left-ventricular-mass-from-the-electrocardiogram-across-the-spectrum-of-lv-mass-from-normal-to-increased-lv-mass-in-an-older-age-group
#14
JOURNAL ARTICLE
Simon W Rabkin, Jeremy C J Zhou
OBJECTIVES: To examine the relationship of QRS voltages and left ventricular (LV) mass across the spectrum of individuals with different LV mass. METHODS: Twenty QRS voltage measurements or combinations were determined in a consecutive series of 159 adults with an ECG and echocardiogram without previous myocardial infarction, left or right bundle branch block, pre-excitation, or electronic pacemaker. RESULTS: The four strongest and significant correlations between QRS and LV mass were S in V4, deepest S wave in any precordial lead plus S in V4, S in V3, and S in V3 plus R in AVL times QRS duration...
2024: Cardiology Research and Practice
https://read.qxmd.com/read/38500489/inadvertent-septal-perforation-during-conduction-system-pacing-device-implant-a-case-report
#15
Jurgen Shtembari, Dhan Bahadur Shrestha, Roderick Tung, Gaurav A Upadhyay
BACKGROUND: There has been recent growing interest in the use of conduction system pacing (CSP) for both bradycardia and heart failure indications. There remains a paucity of data, however, regarding complications related to the intraventricular septum associated with CSP implant and the management of these events. CASE SUMMARY: We present a case of a patient with non-ischemic dilated cardiomyopathy presenting for cardiac resynchronization therapy in whom left bundle branch area pacing was complicated with interventricular septal perforation and managed intra-procedurally with repositioning of the lead to provide His bundle pacing (HBP) for QRS correction of underlying left bundle branch block...
March 2024: European Heart Journal. Case Reports
https://read.qxmd.com/read/38496744/accelerated-idioventricular-rhythm-as-anginous-substrate-in-elderly-report-of-an-unprecedented-case
#16
Rodrigo Rufino Pereira Silva, Carolina Jerônimo Magalhães, Rafael Silvestre Vieira da Silva, Afonso Luiz Tavares de Albuquerque, Sérgio Tavares Montenegro, José Nunes de Alencar Neto
No abstract text is available yet for this article.
March 2024: HeartRhythm Case Reports
https://read.qxmd.com/read/38496176/unmasking-coronary-artery-disease-with-intermittent-left-bundle-branch-block-a-case-report
#17
Kawthar A Alabdrabalrasol, Amal S Al Sulaiman, Lama T Alkhunaizi, Sajedh N Al Kazim, Dunya Alfaraj
Intermittent left bundle branch block (LBBB) is an unusual phenomenon, with very few cases documented in the literature. It is often considered a reflection of underlying conditions known to increase the risk of cardiovascular morbidity and death, including coronary artery disease (CAD), cardiomyopathy, hypertensive heart disease, and aortic valve disease. In rare instances, coronary vasospasm is the sole underlying condition. It is typically diagnosed by ECG and managed according to the underlying cause. We describe a case of intermittent LBBB presenting with chest pain...
February 2024: Curēus
https://read.qxmd.com/read/38495921/application-value-of-serum-cardiac-troponin-t-brain-natriuretic-peptide-levels-and-electrocardiogram-changes-in-the-treatment-and-prognosis-evaluation-of-severe-pneumonia-in-children
#18
JOURNAL ARTICLE
Liang Deng, Xiaojun Liu, Wei Liu
OBJECTIVE: To explore the application of serum cardiac troponin T (cTnT), brain natriuretic peptide (BNP) levels, and electrocardiogram changes in the treatment and prognosis evaluation of severe pneumonia in children. METHODS: 120 children with severe pneumonia (severe group) admitted to our hospital from June 2020 to December 2022 were selected as the study subjects with prospective study. They were divided into survival group (n=78) and death group (n=42) based on their survival status; 120 children with mild pneumonia were selected as the control group...
2024: International Journal of General Medicine
https://read.qxmd.com/read/38495238/qualitative-and-quantitative-electrocardiogram-parameters-in-a-large-cohort-of-children-with-duchenne-muscle-dystrophy-in-comparison-with-age-matched-healthy-subjects-a-study-from-south-india
#19
JOURNAL ARTICLE
Manu S Girija, Deepak Menon, Kiran Polavarapu, Veeramani Preethish-Kumar, Seena Vengalil, Saraswati Nashi, Madassu Keertipriya, Mainak Bardhan, Priya T Thomas, Valasani R Kiran, Vikas Nishadham, Arun Sadasivan, Akshata Huddar, Gopi K Unnikrishnan, Ganagarajan Inbaraj, Arjun Krishnamurthy, Boris W Kramer, Talakad N Sathyaprabha, Atchayaram Nalini
BACKGROUND: Electrocardiography (ECG) remains an excellent screening tool for cardiac assessment in Duchenne muscular dystrophy (DMD), but an accurate interpretation requires comparison with age-matched healthy controls. OBJECTIVE: We examined various ECG parameters in children with DMD, in comparison with age-matched controls. METHODS: Standard 12-lead ECG tracings of serial patients were screened for quality and selected. Controls were healthy, age-matched school-going children...
2024: Annals of Indian Academy of Neurology
https://read.qxmd.com/read/38491719/discrimination-between-ventricular-tachycardia-and-wide-qrs-preexcited-tachycardia
#20
JOURNAL ARTICLE
Jae Hoon Lee
BACKGROUND: To develop a new algorithm to differentiate ventricular tachycardia (VT) from preexcited tachycardia (pre-ET) according to left bundle branch block (LBBB) and right bundle branch block (RBBB) patterns. METHODS: This study included 67 electrocardiograms (ECGs) with VT and 63 ECGs with pre-ET, collected from our hospital and through PubMed. Of those, 64 were allocated to the derivation cohort and the rest to the validation cohort. The diagnoses of the ECGs were confirmed using an electrophysiological study...
March 2024: Annals of Noninvasive Electrocardiology
keyword
keyword
116758
1
2
Fetch more papers »
Fetching more papers... Fetching...
Remove bar
Read by QxMD icon Read
×

Save your favorite articles in one place with a free QxMD account.

×

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"

We want to hear from doctors like you!

Take a second to answer a survey question.