نتایج جستجو برای: مدت زمان qrs
تعداد نتایج: 148054 فیلتر نتایج به سال:
P wave detection requires a robust QRS-T cancellation method. Some interesting algorithms have been proposed for beat-to-beat QRS-T cancellation. Previous studies have shown that adaptive methods lead to a good cancellation of QRS-T interval which generally guaranty the performances of P wave detection. However, adaptive methods suffer from the non-stationary behavior of the ECG signals and par...
BACKGROUND AND OBJECTIVES In the past two decades, an increasing number of nationwide, Swedish Healthcare Quality Registries (QRs) focusing on specific disorders have been initiated, mostly by physicians. Here, we describe the purpose, organization, variables, coverage and completeness of 103 Swedish QRs. METHODS From March to September 2013, we examined the 2012 applications of 103 QRs to th...
STUDY OBJECTIVES There is a lack of epidemiologic information about duration of QRS complex in the general heart failure population. We sought to describe age, sex, and clinical subset specific prevalence of QRS prolongation in this population. METHODS Data were abstracted from the Resource Utilization Among Congestive Heart Failure Study, which identified 29,686 patients with heart failure f...
AIMS In EchoCRT, a randomized trial evaluating the effect of cardiac resynchronization therapy (CRT) in patients with a QRS duration of <130 ms and echocardiographic evidence of left ventricular dyssynchrony, the primary outcome occurred more frequently in the CRT when compared with the control group. According to current heart failure guidelines, CRT is recommended in patients with a QRS durat...
BACKGROUND Previous studies have shown a significantly higher correlation between left ventricular mass index (LVMi) and high-frequency QRS components (HF-QRS) than between LVMi and QRS amplitudes in the standard frequency range in rabbits. The purpose of the present study was to compare ECG measurements from standard and high-frequency ranges with left ventricular mass (LVM) and LVMi determine...
In order to investigate the relation between the infarcted area in myocardial infarction and the change of the QRS loop, the following method was tried. The normal QRS loops in 3 planes were constructed with the digital computer. Then the vector of an optional segment corresponding to infarction was diminished and the QRS loops were constructed. The comparison of the QRS loops in clinical cases...
This review discusses the development of any QRS detection algorithm based on three assessment criteria: robustness to noise, parameter choice, and numerical efficiency. This is because of there is a need nowadays for fast and robust QRS detection algorithms to be deployed on mobile phones, and run over large ECG databases and wireless medical body area network. Till now, there is no satisfying...
یکی از مسائل عمده در تفسیر هر الکتروکاردیوگرام، توجه به تنوع مشاهده شده در شکل امواج قلبی است که نه تنها در بین اعضای مختلف یک گونه، سنین مختلف یا دو جنس، بلکه در یک دام مشخص نیز در زمانهای گوناگون میتواند متفاوت باشد. در تحقیق حاضر فراوانی الگوهای متفاوت مجموعه QRS در گاومیش‌های رودخانهای خوزستان تعیین گردیده است. یک صد رأس گاومیش به دو گروه جنسی و نیز دو گروه سنی تقسیم شدند. از اشتق...
AMAÇ: Çalışmamızın amacı hastanemiz yoğun bakım ünitesinde, solunum yetersizliği nedeniyle yatan SARS-COV2 hastalarının elektrokardiyografisinin (EKG) fragmente QRS (f-QRS) varlığı açısından incelenmesi, f-QRS varlığının mortalite, yatış süresi ve diğer prognostik biyokimyasal tetkikler ile ilişkisini incelemektir. GEREÇ VE YÖNTEM: Hastanemiz ünitesinde Haziran 2020 - Ocak 2021 tarihleri arasın...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید