A 35-Year-Old Pregnant Woman Presenting with Sudden Cardiac Arrest Secondary to Peripartum Cardiomyopathy

Abstract

We present a case of successful resuscitation from cardiac arrest after 25 minutes of ventricular fibrillation (VF) secondary to peripartum cardiomyopathy. This case highlights a rare disease, but also, more importantly, the successful use of the five links of survival: early access to 9-1-1, early cardiopulmonary resuscitation (CPR), early defibrillation, early advanced life support, and postresuscitative care. We also demonstrate the importance of high-quality resuscitation practices in order to achieve a successful outcome. Manual compressions can be performed at a guidelines-compliant rate. With training, users are able to achieve high compression fractions. Pre/post shock delays can be minimized to further increase compression fraction. Nationally, CPR interruptions are often long. We recommend closer attention to uninterrupted 2-minute cycles of CPR, minimizing delays in CPR through training, and a focus on a closely choreographed approach. User review of transthoracic impedance feedback data should play a vital role in a cardiac arrest quality-improvement program.     

Cerebral Embolism Due to Left Ventricular Pacemaker Lead: Removal with Cardiopulmonary Bypass

Malposition of a cardiac pacemaker lead within the left ventricle represents a source of early and late thromboembolic complications. We report a case of cerebral embolism, caused by an inadvertently misplaced left ventricular electrode, occurring 3 years after implantation. The lead was removed via a transaortic approach with extracorporeal circulation.     

地塞米松预防羊水栓塞的临床分析

目的 :探讨静脉注射地塞米松预防剖宫产术羊水栓塞的临床效果。方法 :应用随机单盲的前瞻性研究方法 ,将 80 0例剖宫产术产妇分为两组。研究组 40 0例 ,在手术前静脉注射地塞米松 10mg ;对照组 40 0例 ,在手术前静脉注射 5 %碳酸氢钠 5ml,观察羊水栓塞前驱症状 (寒颤 )的发生率。结果 :寒颤发生率 ,研究组 3 .0 0 % ,对照组6 .2 5 % ,差异显著 (P <0 .0 5 )。结论 :剖宫产术前静脉注射地塞米松 ,起到预防羊水栓塞的作用 ,可作为手术前的预防性用药推广应用。     

Coronary Air Embolism Complicating Transseptal Radiofrequency Ablation of Left Free-Wall Accessory Pathways

Radiofrequency catheter ablation is an important new technique for curing patients with accessory pathway-mediated tachycardia. Ablation of left free-wall accessory pathways may be accomplished either by a retrograde, transarterial approach or via a transseptal approach using a long vascular sheath. We describe air embolization into the coronary artery as a complication of the transseptal approach, which was temporally associated with catheter exchange. While there were no permanent adverse sequelae, this report emphasizes the need for scrupulous attention to the possible insinuation of air during procedures involving long vascular sheaths across the atrial septum. To prevent air embolism, we recommend slow removal of the ablation catheter along with continuous flushing with heparinized saline during exchanges.     

Gains of Continuing Resuscitation in Refractory Out-of-hospital Cardiac Arrest: A Model-based Analysis to Identify Deaths Due to Intra-arrest Prognostication

Objective: Prognostication bias, in which a clinician predicts a negative outcome and terminates resuscitation (TR) thereby ensuring a poor outcome, is a rarely identified limitation of out-of-hospital cardiac arrest (OHCA) research. We sought to estimate the number of deaths due to intra-arrest prognostication in a cohort of OHCA's, and use this data to estimate the incremental benefit of continuing resuscitation. Methods: This study examined a cohort of consecutive non-traumatic EMS-treated OHCAs from a provincial ambulance service, between 2007 and 2011 inclusive. We used Cox and logistic regression modeling, adjusting for Utstein covariates, to estimate the probability of ROSC, survival, and favorable neurological outcomes as a function of resuscitation time, and applied these models to estimate the number of missed survivors in those who had TR (prior to 20, 30, or 40 minutes). We determined the time juncture at which (1) the likelihood of survival fell below 1%, and (2) the proportion of survivors who had achieved ROSC exceeded 99%. Results: Of 5674 adult EMS-treated cases, 46% achieved ROSC, and 12% survived. The median time of TR was 27.0 minutes (IQR 19.0–35.0). Continuing resuscitation until 40 minutes yielded an estimated 17 additional survivors (95% CI 13–21), 10 (95% CI 7–13) with favorable neurological outcomes. The probability of survival of those in refractory arrest decreased below 1% at 28 minutes (95% CI 24–30 minutes). At 36 minutes (95% CI 34–38 minutes) >99% of survivors had achieved ROSC. Conclusion: We identified possible deaths due to intra-arrest prognostication. Resuscitation should be continued for a minimum of 30 minutes in all patients, however for those with initial shockable rhythms 40 minutes appears to be warranted. Interventional trials and observational studies should standardize or adjust for duration of resuscitation prior to TR.     

心肺复苏的质量对复苏后炎症反应的影响

目的 评价临床上常见的不标准心肺复苏(N-CPR)和2005年国际CPR指南推荐的标准心肺复苏(S-CPR)对心脏停搏(CA)猪复苏后炎症反应的影响.方法 18头猪被随机均分成两组,经麻醉、插管、机械通气后,应用程控刺激方法制备心室纤颤(VF)模型.S-CPR组应用2005年指南推荐的CPR方式;N-CPR组模拟临床上经常出现的低质量CPR方式.VF 4 min后开始进行CPR,CPR 9 min后进行电除颤及高级生命支持,自主循环恢复(ROSC)后进行各项指标观察.24 h仍存活的猪经处死后取脑、心、肝、肾组织,应用免疫组化法检测核转录因子-kB(NF-kB)的表达.实验期间连续监测CPR后3、6和9 min的血流动力学变化,并抽取基础状态、CPR 9 rain、ROSC 4 h的静脉血,测定血清肿瘤坏死因子-a(TNF-α)、白细胞介素-1β(IL-1β)的浓度.结果 与N-CPR组比较,S-CPR组ROSC率(22.2%比88.9%)及24 h存活率(22.2%比88.9%)明显提高(P均＜0.05);CPR后3、6和9 min心排血量(CO)和平均动脉压(MAP)也均显著升高(P均＜0.01);并且CPR后9 min和ROSC 4 h血清促炎症因子TNF-α、IL-1β]水平和各组织NF-kB表达程度均降低.结论 高质量的CPR后不仅能提高CA猪的生存率,也明显改善CPR后的炎症反应.     

The Safety of a Field Termination-of-resuscitation Protocol

Background. A 1999 National Association of EMS Physicians position paper recommends that termination of resuscitation (TOR) be considered if the adult nontraumatic out-of-hospital cardiac arrest (OOHCA) patient receives cardiopulmonary resuscitation, definitive airway management, intravenous access, andat least 20 minutes of resuscitative efforts, yet remains in asystole or pulseless electrical activity with no return of spontaneous circulation (ROSC) in the field. Objective. To test the safety of this protocol, with survival to discharge as the primary endpoint. The study hypothesis was that the protocol is 100% specific: no patient who would be eligible for TOR survived to discharge. Methods. Utstein template data were collected prospectively for all OOHCA patients received at two academic emergency departments between August 1999 andJanuary 2003, andretrospective OOHCA data were collected at one of the hospitals covering the interval October 1993 to June 2002. Each case was examined to determine whether the patient would have been eligible for TOR, andwhether he or she survived. Results. Three hundred sixty-six prospective and135 retrospective cases were included. Twelve patients survived to discharge, but none were eligible for TOR, as all had ROSC in the field (specificity 100%, sensitivity 58%). Of the 63 patients who survived to admission, four were eligible for TOR (specificity 94%, sensitivity 64%). None of these four survived to discharge, andnot regained consciousness prior to death. Conclusions. The proposed protocol appears to be safe, with 100% specificity for lack of survival to discharge in this sample. A small number of patients eligible for TOR did survive to admission, but none survived to discharge.     

Use of a Checklist During Observation of a Simulated Cardiac Arrest Scenario Does Not Improve Time to CPR and Defibrillation Over Observation Alone for Subsequent Scenarios

Theory: Immersive simulation is a common mode of education for medical students. Observation of clinical simulations prior to participation is believed to be beneficial, though this is often a passive process. Active observation may be more beneficial. Hypotheses: The hypothesis tested in this study was that the active use of a simple checklist during observation of an immersive simulation would result in better participant performance in a subsequent scenario compared with passive observation alone. Methods: Medical students were randomized to either passive or active (with checklist) observation of an immersive simulation involving cardiac arrest prior to participating in their own simulation. Performance measures included time to cardiopulmonary resuscitation (CPR) and time to defibrillation and were compared between first and second scenarios as well as between passive and active observers. Results: Seventy-nine simulations involving 232 students were conducted. Mean time to CPR was 18 seconds (SD = 11.6) for those using the checklist and 24 seconds (SD = 15.8) for those who observed passively (M difference = 6 seconds), t(35) = 1.46, p =.153. Time to defibrillation was 94 seconds (SD = 26.4) for those using the checklist and 92 seconds (SD = 23.8) for those who observed passively (M difference = –2 seconds), t(38) =.21, p =.837. Time to CPR was 24 seconds (SD = 15.8) for passive observers and 31 seconds (SD = 21.0; M difference = 7 seconds), t(35) = 1.13, p =.265, for their first scenario counterparts. Time to CPR was 18 seconds (SD = 11.6) for active observers and 36 seconds (SD = 26.2; M difference = 18 seconds), t(24) = 2.81, p =.010, for their first scenario counterparts. Time to defibrillation was 92 seconds (SD = 23.8) for passive observers and 125 seconds (SD = 32.2; M difference = 33 seconds), t(33) = 3.63, p =.001, for their first scenario counterparts. Time to defibrillation was 94 seconds (SD = 26.4) for the active observers and 132 seconds (SD = 52.9; M difference = 38 seconds), t(28) =.46, p =.008, for their first scenario counterparts. Conclusions: Observation alone leads to improved performance in the management of a simulated cardiac arrest. The active use of a simple skills-based checklist during observation did not appear to improve performance over passive observation alone.     

赋能教育应用于剖宫产后再次妊娠孕妇的效果评价

目的探讨赋能教育对剖宫产后再次妊娠孕妇的体质量管理、母婴结局和满意度的影响。方法便利抽样选取厦门大学附属第一医院2015年9月至2016年8月收治的270例剖宫产后再次妊娠的孕妇作为观察组,选择2014年9月至2015年8月收治的剖宫产后再次妊娠的孕妇285例作为对照组。观察组接受常规产前检查和孕期宣教课程,同时在孕期宣教课增加赋能教育课程;对照组仅接受常规产前检查和孕期宣教课程。比较两组孕妇体质量管理情况、母婴结局和满意度。结果观察组产程中体质量增加和产后出血率低于对照组,满意度得分和阴道分娩率高于对照组,差异均有统计学意义(均P0.05)。结论赋能教育可有效提高剖宫产后再次妊娠妇女的体质量管理效果和阴道分娩成功率,提高孕妇的满意度,从而达到支持和促进自然分娩的效果。     

When a cesarean section scar is more than an innocent bystander in a subsequent pregnancy: Ultrasound to the rescue

Over the years, cesarean section has played a pivotal role in reducing maternal and perinatal morbidity and mortality. With the rising trend of this surgery, a substantial number of pregnant women have a cesarean section scar. The scar can serve as the abode of grave conditions in subsequent pregnancies, namely cesarean scar pregnancy, morbidly adherent placenta, and scar dehiscence. Sonography has emerged as a robust tool for the diagnosis of these potentially life‐threatening conditions. This review highlights the key sonographic features of various complications that can occur at the cesarean scar site in subsequent pregnancies. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound 45 :319–327, 2017;     

2014-2018年某院剖宫产率及剖宫产指征的变化情况分析

目的分析我院2014-2018年剖宫产率及剖宫产指征的变化,探讨降低剖宫产率的策略和措施。方法回顾性分析2014年1月至2018年12月于我院行剖宫产分娩的42385例产妇的临床资料,分析其剖宫产率及主要剖宫产指征。结果2016年的剖宫产率均低于2014年、2015年、2017年、2018年,差异具有统计学意义(P<0.05)。瘢痕子宫在二胎政策开放后所占比例明显增加;羊水过少及相对头盆不称所占比例呈现逐年下降的趋势。2014-2018年,母体因素所占比例均最高,胎儿因素及头盆因素所占比例逐年下降。另外,社会因素在二胎生育政策开放后仍呈上升趋势。结论2016年剖宫产率明显下降,瘢痕子宫在二胎政策开放后所占比例明显增加。临床需提高剖宫产术后再次妊娠阴道试产的比例、提高助产技术水平、发挥营养门诊及助产士门诊的作用、提高产科医生对胎心监护的正确解读以降低剖宫产率。     

肾上腺素与血管加压素对窒息性心脏骤停大鼠早期心肺复苏的影响

目的：比较肾上腺素与血管加压素对室息性心脏骤停大鼠早期心肺复苏的影响。方法：健康SI）夫鼠48只,体重200～250g,雌雄产拘,将大鼠随机分成4组（n=12）：正常对照组（C组）、模型组（M组）、肾上腺素组（E组）和血管加雎素组（V组）。M组、E组及V绀大鼠均经气管夹闭1min,建立窒息性心脏骤停模型。肖窒息时间达1min时,分别在常规心肺复苏前：c组和M组大鼠经股静脉注射生理盐水1m1。E组及V纰大鼠经股静脉分别注射肾上腺素0．04mg／kg及血管加压素0．4u／kg,H时开始胸外心脏按压及机械通气,观察自主循环恢复情况,5min无效则放弃复苏。自主循环恢复的大鼠连续监测心电和血压30min。记录在CPR30min内自主循环恢复情况及血流动力学;记录CPR30rain后,采用免疫组织化学法检测各组实验大鼠血清中肿瘤坏死因子-水平、白细胞介素6及白细胞介素10水平。结果：E、V组大鼠自主循环恢复率均显著高于M组（分别为73．4％．74．6％,和15．3％,P〈0．05）．E组大鼠自主循环恢复牢与V组比较差异无统计学意义（P〉0．05）;E、V组大鼠平均动脉压明显高于M绀大鼠（P〈0．05）,V组大鼠MAP高于E组大鼠。差异有统计学意义（P〈0．05）。M组大鼠血清中自细胞介素6及肿瘤坏死因子-水平与E、V组差异有统计学意义（P〈0．05）;E组大鼠m清中肿瘤坏死阔子-及白细胞介素-6水平高于V组（P〈0．05）。E组大鼠血清中白细胞介素-10水平低于V组（P〈0．05）。结论：肾卜腺素与血管加压素在窒息性心脏骤停大鼠早期心肺复苏过程中复苏成功牢无明显差异,但血管加乐素町维持大鼠复苏后平均动脉搓在相对较高水平;同时血管加压素可提高复苏后大鼠血清中抗炎因子水平。     

Spontaneous Atonal Respiration in a Swine Model of Out-of-hospital Cardiac Arrest

Objective: To describe ventilator dynamics following the onset of ventricular fibrillation (VF) in an experimental swine model.
Methods: Twelve female mixed-breed domestic swine (mean mass 21.3 2 1.7 kg) were sedated with IM ketamine (10 mag) and xylazine (1 mgntg), anesthetized with α-chloralose (40 mgkg loading dose, 10 mg/kg/hr rnaintenance infusion), incubated, and mechanically ventilated on room air. ECG, and aortic and pulmonary artery pressures were monitored continuously. VF was induced with a 3-sec, 60-Hz, 100-mA Tran thoracic shock, and left untreated for 8 minutes. Respiratory rate, tidal volume, and minute ventilation were recorded until respiratory activity ceased.
Results: All 12 animals (100%) had agonal respirations through the first 2 minutes of arrest. This decreased to 11 (92%) at minute 3, five (42%) at minute 4, and two (17%) at minute 7. Mean respiratory rates ranged from 6 to 11 breathdmin. Mean tidal volumes ranged from 502 to 852 mL. Mean minute ventilations ranged from 3.3 to 5.8 L.
Conclusion: In this swine model, 11 of 12 (92%) continued to have spontaneous agonal respirations for the first 3 minutes of VF cardiac arrest. Many animals had supernormal tidal volumes, and near-normal minute ventilations. These findings have potential implications for lay-rescuer and first-responder contributions to resuscitation of victims of out-of-hospital cardiac arrest.     

Permanent Pacemaker Implantation in a Pregnant Woman with the Guidance of ECG and Two-Dimensional Echocardiography

A 30-year-old pregnant woman was admitted to the Cardiology Research Center with syncope, dizziness, and fatigue on exertion. On ECG complete atrioventricular block was diagnosed. Permanent pacemaker implantation was performed with the guidance of ECG and two-dimensional echocardiography and without the use of fluoroscopy.