Prolonged Atrium Electromechanical Interval Is Associated with Stroke in Patients with Atrial Fibrillation After Catheter Ablation

Electromechanical Interval and Strokes After Ablations of AF . Introduction: Atrial fibrillation (AF) is associated with increased risk of embolic stroke. Catheter ablation of AF provides an effective therapy for patients with symptomatic and drug‐refractory AF. The aim of this study was to evaluate whether the atrial electromechanical interval is useful in identifying patients at risk of stroke after successful catheter ablation. Methods and Results: A total of 279 AF patients who received catheter ablation and showed no evidence of recurrences were enrolled. Electromechanical interval (PA–PDI) was determined as the time interval from the initiation of P wave deflection to the peak of mitral inflow A wave on pulse wave Doppler imaging. The PA–PDI interval was measured for each patient after the 3‐month blanking period of catheter ablation. The clinical endpoint was the occurrence of ischemic stroke. During the follow‐up of 46.5 ± 17.2 months, 6 patients suffered from ischemic strokes. Patients with strokes had higher CHA₂DS₂–VASc scores and longer PA–PDI intervals (138.7 ± 12.4 ms vs 161.2 ± 7.7 ms, P value < 0.001) compared to those without strokes. At a cutoff point of 150 ms identified by ROC curve, the positive and negative predictive values of the PA–PDI interval to predict stroke were 86.7% and 100%, respectively. The PA–PDI interval improved the predictive performance of the CHA₂DS₂–VASc score, and the area under the ROC curve increased from 0.75 to 0.85. Conclusions: Our results suggest that the PA–PDI interval is a useful tool to identify patients with high risk of stroke after successful catheter ablation of AF. (J Cardiovasc Electrophysiol, Vol. 24, pp. 375‐380, April 2013)     

Severe vincristine toxicity in combination with itraconazole

We report two patients with acute lymphoblastic leukaemia (ALL) who were entered into the current MRC adult ALL trial (UKALL XII) in whom unusually severe vincristine induced neurotoxicity developed. This appeared to be the result of an interaction with itraconazole suspension.     

CASE REPORT: Spontaneous isolated mesenteric fibromatosis presenting as megaduodenum

A case of spontaneous isolated mesenteric fibromatosis presenting as megaduodenum is reported. The lesion was small, only 2 cm in its greatest diameter. However, because of its location near the ligament of Treitz and because of its characteristic infiltrative growth pattern, the tumour involved the distal duodenum and resulted in acute angulation and obstruction early in its course. We successfully resected the mass and the patient is in fair physical condition 6 months after operation.     

三亚市实施消灭脊髓灰质炎的策略与效果分析

目的：分析三亚市消灭脊髓灰质炎（以下简称脊灰）不同阶段的免疫策略与效果，为消灭及控制其它疫苗相关疾病提供经验，方法：收集不同阶段所采取的免疫策略，分析实施后产生的效果。结果：不同免疫阶段所产生的效果不同，消灭脊灰阶段免疫策略产生的效果最显。脊灰疫苗常规免疫接种率持续保持在85％以上，22轮次强化免疫接种率均达95％以上，人群抗体在1：400高免疫策略阶段脊灰年发率呈连续下降趋势，监测系统监测资料证实三亚市1993年4月后已连续8年无脊灰野病毒感染病例发生，实现全市无脊灰状态，消灭脊灰以来减少家庭经济负担1，533万－8，390万元，创造效益1，234万－6，669万元，结论：三亚市通过实施消灭脊灰免疫策略，已达到阻断脊灰野病毒的循环，在产生了显的经济效益同时也产生了巨大的社会效益，免疫策略为控制其它疫苗相关疾病提供了宝贵经验。     

Biopharmaceutics: Drug Metabolism and Pharmacokinetics: The Effect of Protein Binding on the Hepatic First Pass of O-Acyl Salicylate Derivatives in the Rat

In this work the in-situ perfused rat liver has been used to examine the effect of changing the protein content of the perfusate on the hepatic extraction of O-acyl esters of salicylic acid. The hepatic availability (F) of these solutes was studied at a flow-rate of 30 mL min^?1 with perfusate albumin concentrations of 0, 2, and 4% w/v. The hepatic availability of the esters was shown to decrease with increasing carbon-chain length in the O-acyl group; for all the esters the hepatic availability increased with increasing albumin concentration in the perfusate. The dispersion-model-derived efficiency number (R_N) of the esters was shown to increase with increasing lipophilicity and decrease with increasing albumin concentration in the perfusate. The unbound fraction (f_u) of the esters decreased with lipophilicity. R_N/f_u for acetylsalicylic acid remained relatively constant as the albumin concentration was increased. However, R_N/f_u for n-pentanoyl-and n-hexanoylsalicylic acids increased significantly as albumin concentration increased from 0% to 4%. Thus, for the more lipophilic solutes (n-pentanoyl- and n-hexanoylsalicylic acids) the presence of albumin apparently facilitates the uptake of unbound solute relative to acetylsalicylic acid.     

石蒜科生物碱的研究 Ⅰ.中国水仙中的生物碱

本文报告了中国水仙Narcissus,tazetta L.var.chinensis Roem.中的6种結晶性生物碱的研究結果。这些生物碱分別証明与lycorine,pluviine,tazettine,homolycorine,lycorenine,pseudolycorine相同。pseudolycorine系用Reinecke銨盐法分得,为中国水仙中的主要生物碱,曾經学者多人研究,迄今尚未从水仙属植物中分得。