VICrOR PARSONNET , M . D . Director
نویسنده
چکیده
Schematic diagram of an alternate possible mechanism in the Lown-Ganong-Levine syndrome. The impulse from the sinoatrial node (SAN) arrives either via the posterior internodal tract (PIT) or the normal tract to the atrioventricular node (AVN) at a His-Purkinje junction (LAMBDA) distal to the recording site of the His electrode. Retrograde depolarization of the proximal, and antegrade depolarization of the distal His-Purkinje system may therefore occur, producing an unusually shortened H-V interval.
منابع مشابه
Mortality prediction in cardiac surgery patients: comparative performance of Parsonnet and general severity systems.
BACKGROUND Our purpose was to assess the performance of general severity systems (Acute Physiology and Chronic Health Evaluation [APACHE], Simplified Acute Physiology Score [SAPS], and Mortality Probability Models [MPM]) and to compare them with the Parsonnet score to predict mortality after cardiac surgery. METHODS AND RESULTS This was a prospective observational study of 465 cardiac surgery...
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OBJECTIVE To study the use of the Parsonnet score to predict mortality following adult cardiac surgery. DESIGN Prospective study. SETTING All centres performing adult cardiac surgery in the north west of England. SUBJECTS 8210 patients undergoing surgery between April 1997 and March 1999. MAIN OUTCOME MEASURES Risk factors and in-hospital mortality were recorded according to agreed defi...
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Lauren Pischel,a Angela C. Poole,b,d Catherine Ley,a Gina Suh,a Julia K. Goodrich,b Thomas D. Haggerty,a Ruth E. Ley,b,d Julie Parsonnet,a,c Department of Medicine, Stanford University School of Medicine, Stanford, California, USAa; Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USAb; Department of Health Research and Policy, Stanford University School of Me...
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Abstract The liquid crystal director distribution is determined for a confined chiral nematic slab. The molecular director distribution of the field-controlled chiral nematic slab is directly calculated. The director profiles for the tilt and the twist angles, under different applied fields, are calculated in the slab with weak boundary conditions. Then, the dependence of the threshold field on...
متن کاملPredicting adverse outcomes of cardiac surgery with the application of artificial neural networks.
Risk-stratification models based on pre-operative patient and disease characteristics are useful for providing individual patients with an insight into the potential risk of complications and mortality, for aiding the clinical decision for surgery vs non-surgical therapy, and for comparing the quality of care between different surgeons or hospitals. Our study aimed to apply artificial neural ne...
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تاریخ انتشار 2005