Cardiac resynchronization therapy has been shown to be an effective treatment for patients with systolic ventricular dysfunction, prolonged (>120 ms) QRS duration, and New York Heart Association (NYHA) functional class III or IV symptoms despite optimal medical therapy. However, studies show that a ...
Objective To explore the relativity of normal QRS complex duration(QRSd) and heart failure. Methods155 patients with chronic heart failure( HF) were admitted,and 40 persons without heart failure were choosed as controls. According to the measurements of QRSd,patients of HF were classified into ...
Methods Patients enrolled in the MOST study with an left ventricular ejection fraction (LVEF) >35%, QRS duration (QRSd) <120 ms and no history of ventricular arrhythmias or prior implantable cardioverter defibrillators were included (LP〆ligible population). Cox proportional hazards models were ...
All patients had apparently normal QRS duration on the routine ECG, and none were taking antiarrhythmic drugs. Echocardiography and signal-averaged electrocardiography were useful in distinguishing the group of athletes with tachyarrhythmias from the group of normal nonsporting controls, but not from ...
3. The total QRS interval and the duration of each component phase were determined in Leads V1, V2, V5, and V6 with aid of a Cambridge measuring device. The average QRS interval was 0.078 second and the upper limit in this series was 0.098 second. There was a trend toward slight length...
与正常QRS duration.14,15此外, 翻译结果2复制译文编辑译文朗读译文返回顶部 翻译结果3复制译文编辑译文朗读译文返回顶部 与正常的 QRS duration.14,15,此外,它 翻译结果4复制译文编辑译文朗读译文返回顶部 翻译结果5复制译文编辑译文朗读译文返回顶部 正在翻译,请等待... ...
The primary manifestation of hypercalcemia is a marked decrease in the duration of the ST segment. The Twave may actually begin at the end of the QRS complex, and virtually no ST segment may be present. This change produces a decrease in the length of the QTc interval. There is a lack ...
variousmethodsforQT-intervalmeasurementhavebeendeveloped,includingindividual-basedcorrectionsforrepolarizationduration,quantitativeassessmentofrepolar-izationmorphology,correctionforrepolarizationdynamic-ity,andanalysisofrepolarizationvariability.However,thesemethodsrequirecomputer-processeddigital-signalanalysisofelectronicallystored...
Her baseline 12-lead electrocardiogram showed normal sinus rhythm with normal PR interval and preexisting right bundle branch block with QRS duration of 138 milliseconds. Profound Sinoatrial Arrest Associated with Ibrutinib (14) identified normal sinus rhythm in 76%, sinus tachycardia in 9%, sinus br...
Objective:The aim of this study was to assess the prevalence of systolic dyssynchrony of the LV walls in patients of HF with a normal QRS duration by Doppler tissue imaging(DTI). 目的:应用多普勒组织显像(DTI)评估严重心衰而QRS间期正常的患者左室收缩不同步的发生率。2...