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Electrocardiography

About: Electrocardiography is a research topic. Over the lifetime, 16410 publications have been published within this topic receiving 518888 citations. The topic is also known as: EKG & ECG.


Papers
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Journal ArticleDOI
TL;DR: The purpose of this paper is to describe the patterns seen in sixty cases of right ventricular hypertrophy and to differentiate normal rightaxis deviation (due to position of the heart) from abnormal right axis deviation ( due toright ventricularhypertrophy).

1,864 citations

Journal ArticleDOI
TL;DR: The estimation of HRV by ambulatory monitoring offers prognostic information beyond that provided by the evaluation of traditional cardiovascular disease risk factors, as well as other relevant risk factors.
Abstract: Background Although heart rate variability (HRV) is altered in a variety of pathological conditions, the association of reduced HRV with risk for new cardiac events has not been studied in a large ...

1,684 citations

Journal ArticleDOI
TL;DR: In this article, the authors examined surgical, electrocardiographic, and late haemodynamic data, and their relation to clinical arrhythmia and sudden death occurring over 10 years, in a multicentre cohort of patients with repaired tetralogy.

1,565 citations

Journal ArticleDOI
TL;DR: Among patients with NYHA class II or III heart failure, a wide QRS complex, and left ventricular systolic dysfunction, the addition of CRT to an ICD reduced rates of death and hospitalization for heart failure.
Abstract: Background Cardiac-resynchronization therapy (CRT) benefits patients with left ventricular systolic dysfunction and a wide QRS complex. Most of these patients are candidates for an implantable cardioverter–defibrillator (ICD). We evaluated whether adding CRT to an ICD and optimal medical therapy might reduce mortality and morbidity among such patients. Methods We randomly assigned patients with New York Heart Association (NYHA) class II or III heart failure, a left ventricular ejection fraction of 30% or less, and an intrinsic QRS duration of 120 msec or more or a paced QRS duration of 200 msec or more to receive either an ICD alone or an ICD plus CRT. The primary outcome was death from any cause or hospitalization for heart failure. Results We followed 1798 patients for a mean of 40 months. The primary outcome occurred in 297 of 894 patients (33.2%) in the ICD–CRT group and 364 of 904 patients (40.3%) in the ICD group (hazard ratio in the ICD–CRT group, 0.75; 95% confi dence interval [CI], 0.64 to 0.87; P<0.001). In the ICD–CRT group, 186 patients died, as compared with 236 in the ICD group (hazard ratio, 0.75; 95% CI, 0.62 to 0.91; P = 0.003), and 174 patients were hospitalized for heart failure, as compared with 236 in the ICD group (hazard ratio, 0.68; 95% CI, 0.56 to 0.83; P<0.001). However, at 30 days after device implantation, adverse events had occurred in 124 patients in the ICD-CRT group, as compared with 58 in the ICD group (P<0.001). Conclusions Among patients with NYHA class II or III heart failure, a wide QRS complex, and left ventricular systolic dysfunction, the addition of CRT to an ICD reduced rates of death and hospitalization for heart failure. This improvement was accompanied by more adverse events. (Funded by the Canadian Institutes of Health Research and Medtronic of Canada; ClinicalTrials.gov number, NCT00251251.)

1,554 citations

Journal ArticleDOI
TL;DR: A novel cardiomyopathy with transient apical ballooning, but without coronary artery stenosis, that mimics acute myocardial infarction was reported, and one died suddenly during follow-up.

1,551 citations


Network Information
Related Topics (5)
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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023253
2022541
2021184
2020264
2019228
2018301