منابع مشابه
rognostic Significance of Quantitative QRS Duration
ACKGROUND: Although QRS duration is known to be a predictor of mortality in patients with left entricular dysfunction, our purpose was to evaluate the prognostic power of computer-measured QRS uration in a general medical population. ETHODS: Analyses were performed on the first electrocardiogram digitally recorded on 46,933 conecutive patients at the Palo Alto Veterans Affairs Medical Center be...
متن کاملPrognostic significance of QRS duration and morphology.
QRS duration and morphology, evaluated via a standard 12-lead electrocardiogram (ECG), represent an opportunity to derive useful prognostic information regarding the risk of subsequent cardiac events or therapeutic outcomes. Prolonged QRS duration, and the presence of intraventricular conduction abnormalities, usually indicate the presence of changes in the myocardium due to underlying heart di...
متن کاملRelationship between QRS complex notch and ventricular dyssynchrony in patients with heart failure and prolonged QRS duration.
BACKGROUND Cardiac resynchronization therapy (CRT) has been accepted as an established therapy for advanced systolic heart failure. Electrical and mechanical dyssynchrony are usually evaluated to increase the percentage of CRT responders. We postulated that QRS notch can increase mechanical LV dyssynchrony independently of other known predictors such as left ventricular ejection fraction and QR...
متن کاملWide QRS Complex Tachycardia
A 71-year-old man with a history of previous myocardial infarction was referred to our hospital for recurrent symptoms of palpitation and syncope. During an episode of palpitations, a 12-lead ECG (Figure 1) was obtained in the emergency room. The ECG shows a wide-QRS complex tachycardia at a rate of 167 bpm. The P waves are positive in lead II (↑) before each QRS complex, and the PR interval is...
متن کاملDuration of QRS complex in resting electrocardiogram is a predictor of sudden cardiac death in men.
BACKGROUND Previous studies indicate that increased QRS duration in ECG is related to the risk of all-cause death. However, the association of QRS duration with the risk of sudden cardiac death (SCD) is not well documented in large population-based studies. Our aim was to examine the relation of QRS duration with SCD in a population-based sample of men. METHODS AND RESULTS This prospective st...
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ژورنال
عنوان ژورنال: Circulation
سال: 1973
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.48.5.1157-b