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Shibahashi K, Nonoguchi N, Inoue K, Kato T, Sugiyama K. Incidence, risk factors, and impact of post-return of spontaneous circulation events in patients with out-of-hospital cardiac arrest: A population-based study in Tokyo, Japan. Resuscitation 2024:110303. [PMID: 38972629 DOI: 10.1016/j.resuscitation.2024.110303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 06/28/2024] [Accepted: 07/01/2024] [Indexed: 07/09/2024]
Abstract
AIM Patients with the return of spontaneous circulation (ROSC) after out-of-hospital cardiac arrest (OHCA) are unstable and often experience rearrest, after which ROSC may be reattained. This study investigated the incidence and risk factors of post-ROSC events (rearrest and subsequent reattainment of ROSC) and their impact on outcomes in patients with prehospital ROSC following OHCA. METHODS Patients with OHCA and prehospital ROSC were identified from the Tokyo Fire Department database between 1 January 2018 and 31 December 2022. The factors associated with post-ROSC events and their impact on 1-month favourable neurological outcome (cerebral performance category scale: 1 or 2) were assessed using multivariable logistic regression analysis. RESULTS Overall, 64,000 individuals experienced OHCA, and 6,190 (9.7%) had ROSC. Rearrest was confirmed in 28.4% of patients with ROSC, and was associated with age, time of emergency call, location of cardiac arrest, dispatcher instruction regarding cardiopulmonary resuscitation, first recorded cardiac rhythm, bystander cardiopulmonary resuscitation, defibrillation by a bystander, response time, and prehospital interventions. ROSC reattainment was confirmed in 34.5% of patients with rearrest and associated with the first recorded cardiac rhythm and defibrillation by a bystander. Patients without rearrests had the highest proportion of favourable neurological outcomes, followed by those with solved and unsolved rearrests (38.6% vs. 22.4% and 4.4%, P < 0.001). The difference remained significant after adjustment for confounders. CONCLUSION This study revealed population-based incidence and risk factors of post-ROSC events. Rearrest was common, leading to unfavourable neurological outcome; however, its deleterious impact may be mitigated by successful resuscitation efforts.
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Affiliation(s)
- Keita Shibahashi
- Tertiary Emergency Medical Center, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Kotobashi, Sumida-ku, Tokyo 130-8575, Japan.
| | - Norikazu Nonoguchi
- Tokyo Fire Department, 1-3-5, Otemachi, Chiyoda-ku, Tokyo 100-8119, Japan
| | - Ken Inoue
- Tertiary Emergency Medical Center, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Kotobashi, Sumida-ku, Tokyo 130-8575, Japan
| | - Taichi Kato
- Tertiary Emergency Medical Center, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Kotobashi, Sumida-ku, Tokyo 130-8575, Japan
| | - Kazuhiro Sugiyama
- Tertiary Emergency Medical Center, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Kotobashi, Sumida-ku, Tokyo 130-8575, Japan
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Laurita KR, Piktel JS, Irish L, Nassal M, Cheng A, McCauley M, Pawlowski G, Dennis AT, Suen Y, Almahameed S, Ziv O, Gourdie RG, Wilson LD. Spontaneous Repolarization Alternans Causes VT/VF Rearrest That Is Suppressed by Preserving Gap Junctions. JACC Clin Electrophysiol 2024; 10:1271-1286. [PMID: 38752959 DOI: 10.1016/j.jacep.2024.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 03/01/2024] [Accepted: 03/07/2024] [Indexed: 06/25/2024]
Abstract
BACKGROUND Ventricular tachycardia (VT)/ventricular fibrillation (VF) rearrest after successful resuscitation is common, and survival is poor. A mechanism of VT/VF, as demonstrated in ex vivo studies, is when repolarization alternans becomes spatially discordant (DIS ALT), which can be enhanced by impaired gap junctions (GJs). However, in vivo spontaneous DIS ALT-induced VT/VF has never been demonstrated, and the effects of GJ on DIS ALT and VT/VF rearrest are unknown. OBJECTIVES This study aimed to determine whether spontaneous VT/VF rearrest induced by DIS ALT occurs in vivo, and if it can be suppressed by preserving Cx43-mediated GJ coupling and/or connectivity. METHODS We used an in vivo porcine model of resuscitation from ischemia-induced cardiac arrest combined with ex vivo optical mapping in porcine left ventricular wedge preparations. RESULTS In vivo, DIS ALT frequently preceded VT/VF and paralleled its incidence at normal (37°C, n = 9) and mild hypothermia (33°C, n = 8) temperatures. Maintaining GJs in vivo with rotigaptide (n = 10) reduced DIS ALT and VT/VF incidence, especially during mild hypothermia, by 90% and 60%, respectively (P < 0.001; P < 0.013). Ex vivo, both rotigaptide (n = 5) and αCT11 (n = 7), a Cx43 mimetic peptide that promotes GJ connectivity, significantly reduced DIS ALT by 60% and 100%, respectively (P < 0.05; P < 0.005), and this reduction was associated with reduced intrinsic heterogeneities of action potential duration rather than changes in conduction velocity restitution. CONCLUSIONS These results provide the strongest in vivo evidence to date suggesting a causal relationship between spontaneous DIS ALT and VT/VF in a clinically realistic scenario. Furthermore, our results suggest that preserving GJs during resuscitation can suppress VT/VF rearrest.
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Affiliation(s)
- Kenneth R Laurita
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA.
| | - Joseph S Piktel
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Laken Irish
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Michelle Nassal
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Aurelia Cheng
- Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Matthew McCauley
- Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Gary Pawlowski
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Adrienne T Dennis
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Yi Suen
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Soufian Almahameed
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Ohad Ziv
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
| | - Robert G Gourdie
- Fralin Biomedical Research Institute, Virginia Tech University, Roanoke, Virginia, USA
| | - Lance D Wilson
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio, USA
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Dombrowski A, Curtis K, Wisniewski S, Nichols J, Irish L, Almahameed S, Ziv O, Piktel JS, Laurita KR, Wilson LD. Post-ROSC Atrial fibrillation is not associated with rearrest but is associated with stroke and mortality following out of hospital cardiac arrest. Resuscitation 2024:110270. [PMID: 38852829 DOI: 10.1016/j.resuscitation.2024.110270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/23/2024] [Accepted: 06/02/2024] [Indexed: 06/11/2024]
Abstract
BACKGROUND Atrial fibrillation (AF) in patients resuscitated from cardiac arrest (CA) is associated with increased short-term mortality. However, whether this is because AF adversely affects early resuscitation success, causes post-resuscitation morbidity, or because it is a marker for patient co-morbidities, remains unclear. We aimed to determine the prevalence of AF in patients with ROSC to test the hypothesis that AF is associated with increased risk of rearrest and to determine its impact on mortality and stroke risk. METHODS We performed a retrospective study of emergency medical services patients with OHCA and ROSC. To examine long-term morbidity and mortality due to AF, an additional observational cohort analysis was performed using a large electronic health record (EHR) database. RESULTS One hundred nineteen patients with ROSC prior to ED arrival were identified. AF was observed in 39 (33%) of patients. Rearrest was not different between AF and no AF groups (44% vs. 41%, p = 0.94). In the EHR analysis, mortality at one year in patients who developed AF was 59% vs. 39% in no AF patients. Odds of stroke was 5x greater in AF patients (p < 0.001), with the majority not anticoagulated (93%, p < 0.001) and comorbidities were greater p < 0.001). CONCLUSIONS AF was common following ROSC and not associated with rearrest. AF after CA was associated with increased mortality and stroke risk. These data suggest rhythm control for AF in the immediate post-ROSC period is not warranted; however, vigilance is required for patients who develop persistent AF, particularly with regards to stroke risk and prevention.
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Affiliation(s)
- Aleksander Dombrowski
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Kristen Curtis
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Steven Wisniewski
- Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States; Ohio University Heritage College of Osteopathic Medicine, United States
| | - Julie Nichols
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Laken Irish
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Soufian Almahameed
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Ohad Ziv
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Joseph S Piktel
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Kenneth R Laurita
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States
| | - Lance D Wilson
- The Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States; Department of Emergency Medicine, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, United States.
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Steinberg A. Emergent Management of Hypoxic-Ischemic Brain Injury. Continuum (Minneap Minn) 2024; 30:588-610. [PMID: 38830064 DOI: 10.1212/con.0000000000001426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
OBJECTIVE This article outlines interventions used to improve outcomes for patients with hypoxic-ischemic brain injury after cardiac arrest. LATEST DEVELOPMENTS Emergent management of patients after cardiac arrest requires prevention and treatment of primary and secondary brain injury. Primary brain injury is minimized by excellent initial resuscitative efforts. Secondary brain injury prevention requires the detection and correction of many pathophysiologic processes that may develop in the hours to days after the initial arrest. Key physiologic parameters important to secondary brain injury prevention include optimization of mean arterial pressure, cerebral perfusion, oxygenation and ventilation, intracranial pressure, temperature, and cortical hyperexcitability. This article outlines recent data regarding the treatment and prevention of secondary brain injury. Different patients likely benefit from different treatment strategies, so an individualized approach to treatment and prevention of secondary brain injury is advisable. Clinicians must use multimodal sources of data to prognosticate outcomes after cardiac arrest while recognizing that all prognostic tools have shortcomings. ESSENTIAL POINTS Neurologists should be involved in the postarrest care of patients with hypoxic-ischemic brain injury to improve their outcomes. Postarrest care requires nuanced and patient-centered approaches to the prevention and treatment of primary and secondary brain injury and neuroprognostication.
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Smida T, Crowe RP, Martin PS, Scheidler JF, Price BS, Bardes JM. A retrospective, multi-agency 'target trial emulation' for the comparison of post-resuscitation epinephrine to norepinephrine. Resuscitation 2024; 198:110201. [PMID: 38582437 PMCID: PMC11088500 DOI: 10.1016/j.resuscitation.2024.110201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 03/05/2024] [Accepted: 03/25/2024] [Indexed: 04/08/2024]
Abstract
INTRODUCTION Epinephrine and norepinephrine are the two most commonly used prehospital vasopressors in the United States. Prior studies have suggested that use of a post-ROSC epinephrine infusion may be associated with increased rearrest and mortality in comparison to use of norepinephrine. We used target trial emulation methodology to compare the rates of rearrest and mortality between the groups of OHCA patients receiving these vasopressors in the prehospital setting. METHODS Adult (18-80 years of age) non-traumatic OHCA patients in the 2018-2022 ESO Data Collaborative datasets with a documented post-ROSC norepinephrine or epinephrine infusion were included in this study. Logistic regression modeling was used to evaluate the association between vasopressor agent and outcome using two sets of covariables. The first set of covariables included standard Utstein factors, the dispatch to ROSC interval, the ROSC to vasopressor interval, and the follow-up interval. The second set added prehospital systolic blood pressure and SpO2 values. Kaplan-Meier time-to-event analysis was also conducted and the vasopressor groups were compared using a multivariable Cox regression model. RESULTS Overall, 1,893 patients treated by 309 EMS agencies were eligible for analysis. 1,010 (53.4%) received an epinephrine infusion and 883 (46.7%) received a norepinephrine infusion as their initial vasopressor. Adjusted analyses did not discover an association between vasopressor agent and rearrest (aOR: 0.93 [0.72, 1.21]) or mortality (aOR: 1.00 [0.59, 1.69]). CONCLUSIONS In this multi-agency target trial emulation, the use of a post-resuscitation epinephrine infusion was not associated with increased odds of rearrest in comparison to the use of a norepinephrine infusion.
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Affiliation(s)
- Tanner Smida
- West Virginia University, MD/PhD Program, Morgantown, WV, USA.
| | | | - P S Martin
- West Virginia University, Department of Emergency Medicine, Division of Prehospital Medicine, Morgantown, WV, USA
| | - James F Scheidler
- West Virginia University, Department of Emergency Medicine, Division of Prehospital Medicine, Morgantown, WV, USA
| | - Bradley S Price
- John Chambers College of Business and Economics, Morgantown, WV, USA
| | - James M Bardes
- West Virginia University, Department of Surgery, Division of Trauma, Surgical Critical Care, and Acute Care Surgery, Morgantown, WV, USA
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Johnson NJ, Rea TD. Defining, divining, and defeating recurrent cardiac arrest. Resuscitation 2024; 198:110175. [PMID: 38479651 PMCID: PMC11088488 DOI: 10.1016/j.resuscitation.2024.110175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 03/06/2024] [Indexed: 03/22/2024]
Affiliation(s)
- Nicholas J Johnson
- Department of Emergency Medicine, University of Washington, Seattle, WA, United States; Department of Medicine, University of Washington, Seattle, WA, United States.
| | - Thomas D Rea
- Department of Medicine, University of Washington, Seattle, WA, United States; King County Emergency Medical Services Agency, Seattle, WA, United States
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Tominaga N, Takiguchi T, Seki T, Hamaguchi T, Nakata J, Yamamoto T, Tagami T, Inoue A, Hifumi T, Sakamoto T, Kuroda Y, Yokobori S. Factors associated with favourable neurological outcomes following cardiopulmonary resuscitation for out-of-hospital cardiac arrest: A retrospective multi-centre cohort study. Resusc Plus 2024; 17:100574. [PMID: 38370315 PMCID: PMC10869306 DOI: 10.1016/j.resplu.2024.100574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/03/2024] [Accepted: 01/29/2024] [Indexed: 02/20/2024] Open
Abstract
Aim To investigate the factors associated with favourable neurological outcomes in adult patients undergoing extracorporeal cardiopulmonary resuscitation (ECPR) for out-of-hospital cardiac arrest (OHCA). Methods This retrospective observational study used secondary analysis of the SAVE-J II multicentre registry data from 36 institutions in Japan. Between 2013 and 2018, 2157 patients with OHCA who underwent ECPR were enrolled in SAVE-J II. A total of 1823 patients met the study inclusion criteria. Adult patients (aged ≥ 18 years) with OHCA, who underwent ECPR before admission to the intensive care unit, were included in our secondary analysis. The primary outcome was a favourable neurological outcome at hospital discharge, defined as a Cerebral Performance Category score of 1 or 2. We used a multivariate logistic regression model to examine the association between factors measured at the incident scene or upon hospital arrival and favourable neurological outcomes. Results Multivariable analysis revealed that shockable rhythm at the scene [odds ratio (OR); 2.11; 95% confidence interval (CI), 1.16-3.95] and upon hospital arrival (OR 2.59; 95% CI 1.60-4.30), bystander CPR (OR 1.63; 95% CI 1.03-1.88), body movement during resuscitation (OR 7.10; 95% CI 1.79-32.90), gasping (OR 4.33; 95% CI 2.57-7.28), pupillary reflex on arrival (OR 2.93; 95% CI 1.73-4.95), and male sex (OR 0.43; 95% CI 0.24-0.75) significantly correlated with neurological outcomes. Conclusions Shockable rhythm, bystander CPR, body movement during resuscitation, gasping, pupillary reflex, and sex were associated with favourable neurological outcomes in patients with OHCA treated with ECPR.
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Affiliation(s)
- Naoki Tominaga
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
| | - Toru Takiguchi
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
- Department of Healthcare Information Management, The University of Tokyo Hospital, Tokyo, Japan
| | - Tomohisa Seki
- Department of Healthcare Information Management, The University of Tokyo Hospital, Tokyo, Japan
| | - Takuro Hamaguchi
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
| | - Jun Nakata
- Division of Cardiovascular Intensive Care, Department of Cardiovascular Medicine, Nippon Medical School Hospital, Tokyo, Japan
| | - Takeshi Yamamoto
- Division of Cardiovascular Intensive Care, Department of Cardiovascular Medicine, Nippon Medical School Hospital, Tokyo, Japan
| | - Takashi Tagami
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
| | - Akihiko Inoue
- Department of Emergency and Critical Care Medicine, Hyogo Emergency Medical Centre, Kobe, Japan
| | - Toru Hifumi
- Department of Emergency and Critical Care Medicine, St. Luke’s International Hospital, Tokyo, Japan
| | - Tetsuya Sakamoto
- Department of Emergency Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Yasuhiro Kuroda
- Department of Emergency Medicine, Kagawa University School of Medicine, Kagawa, Japan
| | - Shoji Yokobori
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
| | - SAVE-J II study group Investigation Supervision
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
- Department of Healthcare Information Management, The University of Tokyo Hospital, Tokyo, Japan
- Division of Cardiovascular Intensive Care, Department of Cardiovascular Medicine, Nippon Medical School Hospital, Tokyo, Japan
- Department of Emergency and Critical Care Medicine, Hyogo Emergency Medical Centre, Kobe, Japan
- Department of Emergency and Critical Care Medicine, St. Luke’s International Hospital, Tokyo, Japan
- Department of Emergency Medicine, Teikyo University School of Medicine, Tokyo, Japan
- Department of Emergency Medicine, Kagawa University School of Medicine, Kagawa, Japan
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Suchko S, Smida T, Crowe RP, Menegazzi JJ, Scheidler JF, Shukis M, Martin PS, Bardes JM, Salcido DD. The association of clinical, treatment, and demographic characteristics with rearrest in a national dataset. Resuscitation 2024; 196:110135. [PMID: 38331343 DOI: 10.1016/j.resuscitation.2024.110135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/23/2024] [Accepted: 02/02/2024] [Indexed: 02/10/2024]
Abstract
INTRODUCTION Following initial resuscitation from out-of-hospital cardiac arrest, rearrest frequently occurs and has been associated with adverse outcomes. We aimed to identify clinical, treatment, and demographic characteristics associated with prehospital rearrest at the encounter and agency levels. METHODS Adult non-traumatic cardiac arrest patients who achieved ROSC following EMS resuscitation in the 2018-2021 ESO annual datasets were included in this study. Patients were excluded if they had a documented DNR/POLST or achieved ROSC after bystander CPR only. Rearrest was defined as post-ROSC CPR initiation, administration of ≥ 1 milligram of adrenaline, defibrillation, or a documented non-perfusing rhythm on arrival at the receiving hospital. Multivariable logistic regression modeling was used to evaluate the association between rearrest and case characteristics. Linear regression modeling was used to evaluate the association between agency-level factors (ROSC rate, scene time, and scene termination rate), and rearrest rate. RESULTS Among the 53,027 cases included, 16,116 (30.4%) experienced rearrest. Factors including longer response intervals, longer 'low-flow' intervals, unwitnessed OHCA, and a lack of bystander CPR were associated with rearrest. Among agencies that treated ≥ 30 patients with outcome data, the agency-level rate of rearrest was inversely associated with agency-level rate of survival to discharge to home (R2 = -0.393, p < 0.001). CONCLUSIONS This multiagency retrospective study found that factors associated with increased ischaemic burden following OHCA were associated with rearrest. Agency-level rearrest frequency was inversely associated with agency-level survival to home. Interventions that decrease the burden of ischemia sustained by OHCA patients may decrease the rate of rearrest and increase survival.
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Affiliation(s)
- Sarah Suchko
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, USA
| | - Tanner Smida
- West Virginia University MD/PhD Program, Morgantown, West Virginia, USA.
| | | | - James J Menegazzi
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, USA
| | - James F Scheidler
- West Virginia University Department of Emergency Medicine, Division of Prehospital Medicine, Morgantown, West Virginia, USA
| | - Michael Shukis
- West Virginia University Department of Emergency Medicine, Division of Prehospital Medicine, Morgantown, West Virginia, USA
| | - P S Martin
- West Virginia University Department of Emergency Medicine, Division of Prehospital Medicine, Morgantown, West Virginia, USA
| | - James M Bardes
- West Virginia University Department of Emergency Medicine, Division of Prehospital Medicine, Morgantown, West Virginia, USA
| | - David D Salcido
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, USA
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Yang J, Tang H, Shao S, Xu F, Fu Y, Xu S, Li C, Li Y, Liu Y, Walline JH, Zhu H, Chen Y, Yu X, Xu J. A novel predictor of unsustained return of spontaneous circulation in cardiac arrest patients through a combination of capnography and pulse oximetry: a multicenter observational study. World J Emerg Med 2024; 15:16-22. [PMID: 38188554 PMCID: PMC10765080 DOI: 10.5847/wjem.j.1920-8642.2023.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 10/16/2023] [Indexed: 01/09/2024] Open
Abstract
BACKGROUND Unsustained return of spontaneous circulation (ROSC) is a critical barrier to survival in cardiac arrest patients. This study examined whether end-tidal carbon dioxide (ETCO2) and pulse oximetry photoplethysmogram (POP) parameters can be used to identify unsustained ROSC. METHODS We conducted a multicenter observational prospective cohort study of consecutive patients with cardiac arrest from 2013 to 2014. Patients' general information, ETCO2, and POP parameters were collected and statistically analyzed. RESULTS The included 105 ROSC episodes (from 80 cardiac arrest patients) comprised 51 sustained ROSC episodes and 54 unsustained ROSC episodes. The 24-hour survival rate was significantly higher in the sustained ROSC group than in the unsustained ROSC group (29.2% vs. 9.4%, P<0.05). The logistic regression analysis showed that the difference between after and before ROSC in ETCO2 (ΔETCO2) and the difference between after and before ROCS in area under the curve of POP (ΔAUCp) were independently associated with sustained ROSC (odds ratio [OR]=0.931, 95% confidence interval [95% CI] 0.881-0.984, P=0.011 and OR=0.998, 95% CI 0.997-0.999, P<0.001). The area under the receiver operating characteristic curve of ΔETCO2, ΔAUCp, and the combination of both to predict unsustained ROSC were 0.752 (95% CI 0.660-0.844), 0.883 (95% CI 0.818-0.948), and 0.902 (95% CI 0.842-0.962), respectively. CONCLUSION Patients with unsustained ROSC have a poor prognosis. The combination of ΔETCO2 and ΔAUCp showed significant predictive value for unsustained ROSC.
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Affiliation(s)
- Jing Yang
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Hanqi Tang
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Shihuan Shao
- Emergency Department, Peking University People’s Hospital, Beijing 100044, China
| | - Feng Xu
- Department of Emergency and Chest Pain Center; Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine; Key Laboratory of Emergency and Critical Care Medicine of Shandong Province, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Yangyang Fu
- Emergency Department, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Shengyong Xu
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Chen Li
- Emergency Department, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Yan Li
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Yang Liu
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Joseph Harold Walline
- Department of Emergency Medicine, Penn State Health Milton S. Hershey Medical Center and Penn State College of Medicine, Hershey 17033, USA
| | - Huadong Zhu
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Yuguo Chen
- Department of Emergency and Chest Pain Center; Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine; Key Laboratory of Emergency and Critical Care Medicine of Shandong Province, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Xuezhong Yu
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Jun Xu
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
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Menegazzi JJ, Bosson N, Gausche-Hill M, Montoy JCC, Dillon DJG, Donofrio-Ödmann JJ, Salcido DD. Letter to the Editor: Vasopressors and Rearrest. PREHOSP EMERG CARE 2023; 28:459-460. [PMID: 37797213 DOI: 10.1080/10903127.2023.2264925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 09/26/2023] [Indexed: 10/07/2023]
Affiliation(s)
- James J Menegazzi
- University of Pittsburgh - Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Nichole Bosson
- University of Pittsburgh - Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | | | | | - David J G Dillon
- University of Pittsburgh - Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | | | - David D Salcido
- University of Pittsburgh - Emergency Medicine, Pittsburgh, Pennsylvania, USA
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Zhang Y, Rao C, Ran X, Hu H, Jing L, Peng S, Zhu W, Li S. How to predict the death risk after an in-hospital cardiac arrest (IHCA) in intensive care unit? A retrospective double-centre cohort study from a tertiary hospital in China. BMJ Open 2023; 13:e074214. [PMID: 37798030 PMCID: PMC10565198 DOI: 10.1136/bmjopen-2023-074214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 08/07/2023] [Indexed: 10/07/2023] Open
Abstract
OBJECTIVES Our objective is to develop a prediction tool to predict the death after in-hospital cardiac arrest (IHCA). DESIGN We conducted a retrospective double-centre observational study of IHCA patients from January 2015 to December 2021. Data including prearrest diagnosis, clinical features of the IHCA and laboratory results after admission were collected and analysed. Logistic regression analysis was used for multivariate analyses to identify the risk factors for death. A nomogram was formulated and internally evaluated by the boot validation and the area under the curve (AUC). Performance of the nomogram was further accessed by Kaplan-Meier survival curves for patients who survived the initial IHCA. SETTING Intensive care unit, Tongji Hospital, China. PARTICIPANTS Adult patients (≥18 years) with IHCA after admission. Pregnant women, patients with 'do not resuscitation' order and patients treated with extracorporeal membrane oxygenation were excluded. INTERVENTIONS None. PRIMARY AND SECONDARY OUTCOME MEASURES The primary outcome was the death after IHCA. RESULTS Patients (n=561) were divided into two groups: non-sustained return of spontaneous circulation (ROSC) group (n=241) and sustained ROSC group (n=320). Significant differences were found in sex (p=0.006), cardiopulmonary resuscitation (CPR) duration (p<0.001), total duration of CPR (p=0.014), rearrest (p<0.001) and length of stay (p=0.004) between two groups. Multivariate analysis identified that rearrest, duration of CPR and length of stay were independently associated with death. The nomogram including these three factors was well validated using boot calibration plot and exhibited excellent discriminative ability (AUC 0.88, 95% CI 0.83 to 0.93). The tertiles of patients in sustained ROSC group stratified by anticipated probability of death revealed significantly different survival rate (p<0.001). CONCLUSIONS Our proposed nomogram based on these three factors is a simple, robust prediction model to accurately predict the death after IHCA.
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Affiliation(s)
- Youping Zhang
- Department of Emergency Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Caijun Rao
- Department of Geriatric, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xiao Ran
- Department of Emergency Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hongjie Hu
- Department of Emergency Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Liang Jing
- Department of Emergency Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Shu Peng
- Department of Thoracic Surgery, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Wei Zhu
- Department of Emergency Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Shusheng Li
- Department of Emergency Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Singh A, Jefferson J. Post-Cardiac Arrest Care. Emerg Med Clin North Am 2023; 41:617-632. [PMID: 37391254 DOI: 10.1016/j.emc.2023.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
A structured approach to postcardiac arrest care is needed. Although immediate goals include obtaining a blood pressure reading and ECG immediately after return of spontaneous circulation, other more advanced goals include minimizing CNS injury, managing cardiovascular dysfunction, reducing systemic ischemic/reperfusion injury, and identifying and treating the underlying cause to the arrest. This article summarizes the current understanding of the hemodynamic, neurologic, and metabolic abnormalities encountered in postarrest patients.
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Affiliation(s)
- Amandeep Singh
- Department of Emergency Medicine, Highland Hospital, 1411 East 31st Street, Oakland, CA 94602, USA.
| | - Jamal Jefferson
- Department of Emergency Medicine, Highland Hospital, 1411 East 31st Street, Oakland, CA 94602, USA
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Khan L, Hutton J, Yap J, Dodek P, Scheuermeyer F, Asamoah-Boaheng M, Heidet M, Wall N, Fordyce CB, van Diepen S, Christenson J, Grunau B. The association of the post-resuscitation on-scene interval and patient outcomes after out-of-hospital cardiac arrest. Resuscitation 2023:109753. [PMID: 36842676 DOI: 10.1016/j.resuscitation.2023.109753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/16/2023] [Accepted: 02/20/2023] [Indexed: 02/26/2023]
Abstract
BACKGROUND After resuscitation from out-of-hospital cardiac arrest (OHCA) by Emergency Medical Services (EMS), the amount of time that should be dedicated to pre-transport stabilization is unclear. We examined whether the time spent on-scene after return of spontaneous circulation (ROSC) was associated with patient outcomes. METHODS We examined consecutive adult EMS-treated OHCAs from the British Columbia Cardiac Arrest registry (January 1/2019-June 1/2021) that had on-scene ROSC (sustained to scene departure). The primary outcome was favourable neurological outcome (Cerebral Performance Category ≤ 2) at hospital discharge; secondary outcomes were re-arrest during transport and hospital-discharge survival. Using adjusted logistic regression models, we estimated the association between the post-resuscitation on-scene interval (divided into quartiles) and outcomes. RESULTS Of 1653 cases, 611 (37%) survived to hospital discharge, and 523 (32%) had favourable neurological outcomes. The median post-resuscitation on-scene interval was 18.8 minutes (IQR:13.0-25.5). Compared to the first post-resuscitation on-scene interval quartile, neither the second (adjusted odds ratio [AOR] 1.19; 95% CI 0.72-1.98), third (AOR 1.10; 95% CI 0.67-1.81), nor fourth (AOR 1.54; 95% CI 0.93-2.56) quartiles were associated with favourable neurological outcomes; however, the fourth quartile was associated with a greater odds of hospital-discharge survival (AOR 1.73; 95% CI 1.05-2.85), and both the third (AOR 0.40; 95% CI 0.22-0.72) and fourth (AOR 0.44;95% CI 0.24-0.81) quartiles were associated with a lower odds of intra-transport re-arrest. CONCLUSION Among resuscitated OHCAs, increased post-resuscitation on-scene time was not associated with improved neurological outcomes, but was associated with improved survival to hospital discharge and decreased intra-transport re-arrest.
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Affiliation(s)
- Laiba Khan
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Faculty of Science, University of British Columbia, British Columbia, Canada
| | - Jacob Hutton
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; British Columbia Emergency Health Services, British Columbia, Canada; Faculty of Medicine, University of British Columbia, British Columbia, Canada; Department of Emergency Medicine, St. Paul's Hospital and the University of British Columbia, British Columbia, Canada
| | - Justin Yap
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Faculty of Science, University of British Columbia, British Columbia, Canada
| | - Peter Dodek
- Faculty of Medicine, University of British Columbia, British Columbia, Canada; Centre for Health Evaluation and Outcome Sciences, St. Paul's Hospital, Vancouver, Canada; Division of Critical Care Medicine, University of British Columbia, British Columbia, Canada
| | - Frank Scheuermeyer
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Faculty of Medicine, University of British Columbia, British Columbia, Canada; Centre for Health Evaluation and Outcome Sciences, St. Paul's Hospital, Vancouver, Canada; Department of Emergency Medicine, St. Paul's Hospital and the University of British Columbia, British Columbia, Canada
| | - Michael Asamoah-Boaheng
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Centre for Health Evaluation and Outcome Sciences, St. Paul's Hospital, Vancouver, Canada; Department of Emergency Medicine, St. Paul's Hospital and the University of British Columbia, British Columbia, Canada
| | - Matthieu Heidet
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Assistance Publique - Hôpitaux de Paris (AP-HP), SAMU 94 and Emergency Department, Hôpitaux universitaires Henri Mondor, Créteil, France; Université Paris-Est Créteil (UPEC), CIR (EA-3956), Créteil, France
| | - Nechelle Wall
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; British Columbia Emergency Health Services, British Columbia, Canada
| | - Christopher B Fordyce
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Centre for Health Evaluation and Outcome Sciences, St. Paul's Hospital, Vancouver, Canada; Divisions of Cardiology, Vancouver General Hospital and the University of British Columbia, British Columbia, Canada
| | - Sean van Diepen
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Department of Critical Care Medicine and Division of Cardiology, University of Alberta, Edmonton, Alberta, Canada
| | - Jim Christenson
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; Faculty of Medicine, University of British Columbia, British Columbia, Canada; Centre for Health Evaluation and Outcome Sciences, St. Paul's Hospital, Vancouver, Canada; Department of Emergency Medicine, St. Paul's Hospital and the University of British Columbia, British Columbia, Canada
| | - Brian Grunau
- British Columbia Resuscitation Research Collaborative, British Columbia, Canada; British Columbia Emergency Health Services, British Columbia, Canada; Faculty of Medicine, University of British Columbia, British Columbia, Canada; Centre for Health Evaluation and Outcome Sciences, St. Paul's Hospital, Vancouver, Canada; Department of Emergency Medicine, St. Paul's Hospital and the University of British Columbia, British Columbia, Canada.
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Toy J, Tolles J, Bosson N, Hauck A, Abramson T, Sanko S, Kazan C, Eckstein M, Gausche-Hill M, Schlesinger SA. Association between a Post-Resuscitation Care Bundle and the Odds of Field Rearrest after Successful Resuscitation from Out-of-Hospital Cardiac Arrest: A Pre/Post Study. PREHOSP EMERG CARE 2023; 28:98-106. [PMID: 36692410 DOI: 10.1080/10903127.2023.2172633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 01/20/2023] [Indexed: 01/25/2023]
Abstract
OBJECTIVES Rearrest after successful resuscitation from out-of-hospital cardiac arrest (OHCA) is common and is associated with worse patient outcomes. However, little is known about the effect of interventions designed to prevent rearrest. We assessed the association between a prehospital care protocol for immediate management after return of spontaneous circulation (ROSC) and rates of field rearrest and survival to discharge in patients with prehospital ROSC. METHODS This was a retrospective study of adult patients with OHCA and field ROSC within a large EMS system before (April 2017-August 2018) and after (April 2019-February 2020) implementation of a structured prehospital post-ROSC care protocol. The protocol was introduced in September 2018 and provided on-scene stabilization direction including guidance on ventilation and blood pressure support. Field data and hospital outcomes were used to compare the frequency of field rearrest, hospital survival, and survival with good neurologic outcome before and after protocol implementation. Logistic regression was used to assess the association between the post-implementation period and these outcomes, and odds ratios were reported. The association between individual interventions on these outcomes was also explored. RESULTS There were 2,706 patients with ROSC after OHCA in the pre-implementation period and 1,780 patients in the post-implementation period. The rate of prehospital rearrest was 43% pre-implementation vs 45% post-implementation (RD 2%, 95% CI -1, 4%). In the adjusted analysis, introduction of the protocol was not associated with decreased odds of rearrest (OR 0.87, 95% CI 0.73, 1.04), survival to hospital discharge (OR 1.01, 95% CI 0.81, 1.24), or survival with good neurologic outcome (OR 0.81, 95% CI 0.61, 1.06). Post-implementation, post-ROSC administration of saline and push-dose epinephrine increased from 11% to 25% (RD 14%, 95% CI 11, 17%) and from 3% to 12% (RD 9% 95% CI 7, 11%), respectively. In an exploratory analysis, push-dose epinephrine was associated with a decreased odds of rearrest (OR 0.68, 95% CI 0.50, 0.94). CONCLUSIONS Introduction of a post-ROSC care protocol for patients with prehospital ROSC after OHCA was not associated with reduced odds of field rearrest. When elements of the care bundle were considered individually, push-dose epinephrine was associated with decreased odds of rearrest.
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Affiliation(s)
- Jake Toy
- Department of Emergency Medicine, Harbor-UCLA Medical Center, Torrance, CA, USA
- The Lundquist Institute, Torrance, CA, USA
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
- Los Angeles County EMS Agency, Santa Fe Springs, CA, USA
| | - Juliana Tolles
- Department of Emergency Medicine, Harbor-UCLA Medical Center, Torrance, CA, USA
- The Lundquist Institute, Torrance, CA, USA
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Nichole Bosson
- Department of Emergency Medicine, Harbor-UCLA Medical Center, Torrance, CA, USA
- The Lundquist Institute, Torrance, CA, USA
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
- Los Angeles County EMS Agency, Santa Fe Springs, CA, USA
| | - Aaron Hauck
- Department of Emergency Medicine, Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Tiffany Abramson
- Department of Emergency Medicine, Los Angeles County-USC Medical Center, Los Angeles, CA, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Stephen Sanko
- Department of Emergency Medicine, Los Angeles County-USC Medical Center, Los Angeles, CA, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Los Angeles Fire Department, Los Angeles, CA, USA
| | - Clayton Kazan
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
- Los Angeles County Fire Department, Los Angeles, CA, USA
| | - Marc Eckstein
- Department of Emergency Medicine, Los Angeles County-USC Medical Center, Los Angeles, CA, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Marianne Gausche-Hill
- Department of Emergency Medicine, Harbor-UCLA Medical Center, Torrance, CA, USA
- The Lundquist Institute, Torrance, CA, USA
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
- Los Angeles County EMS Agency, Santa Fe Springs, CA, USA
| | - Shira A Schlesinger
- Department of Emergency Medicine, Harbor-UCLA Medical Center, Torrance, CA, USA
- The Lundquist Institute, Torrance, CA, USA
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
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15
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Otani T, Hifumi T, Inoue A, Abe T, Sakamoto T, Kuroda Y. Transient return of spontaneous circulation related to favourable outcomes in out-of-hospital cardiac arrest patients resuscitated with extracorporeal cardiopulmonary resuscitation: A secondary analysis of the SAVE-J II study. Resusc Plus 2022; 12:100300. [PMID: 36157919 PMCID: PMC9494238 DOI: 10.1016/j.resplu.2022.100300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/03/2022] [Accepted: 08/29/2022] [Indexed: 11/18/2022] Open
Abstract
Aim This study aimed to investigate the relationship between transient return of spontaneous circulation (ROSC) before extracorporeal membrane oxygenation (ECMO) initiation and outcomes in out-of-hospital cardiac arrest (OHCA) patients, who were resuscitated with extracorporeal cardiopulmonary resuscitation (ECPR). Methods This study was a secondary analysis of the SAVE-J II study, which was a retrospective multicentre registry study involving 36 participating institutions in Japan. We classified patients into two groups according to the presence or absence of transient ROSC before ECMO initiation. Transient ROSC was defined as any palpable pulse of ≥1 min before ECMO initiation. The primary outcome was favourable neurological outcomes (cerebral performance categories 1–2). Results Of 2,157 patients registered in the SAVE-J II study, 1,501 met the study inclusion criteria; 328 (22%) experienced transient ROSC before ECMO initiation. Patients with transient ROSC had better outcomes than those without ROSC (favourable neurological outcome, 26% vs 12%, P < 0.001; survival to hospital discharge, 46% vs 24%, respectively; P < 0.001). A Kaplan–Meier plot showed better survival in the transient ROSC group (log-rank test, P < 0.001). In multiple logistic analyses, transient ROSC was significantly associated with favourable neurological outcomes and survival (favourable neurological outcomes, adjusted odds ratio, 3.34 [95% confidence interval, 2.35–4.73]; survival, adjusted odds ratio, 3.99 [95% confidence interval, 2.95–5.40]). Conclusions In OHCA patients resuscitated with ECPR, transient ROSC before ECMO initiation was associated with favourable outcomes. Hence, transient ROSC is a predictor of improved outcomes after ECPR.
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Affiliation(s)
- Takayuki Otani
- Department of Emergency Medicine, Hiroshima City Hiroshima Citizens Hospital, 7-33 Motomachi, Naka-ku, Hiroshima-city, Hiroshima 730-8518, Japan
- Corresponding author at: Department of Emergency Medicine, Hiroshima City Hiroshima Citizens Hospital, 7-33 Motomachi, Naka-ku, Hiroshima-city, Hiroshima 730-8518, Japan.
| | - Toru Hifumi
- Department of Emergency and Critical Care Medicine, St. Luke’s International Hospital, 9-1 Akashi-cho, Chuo-ku, Tokyo 104-8560, Japan
| | - Akihiko Inoue
- Department of Emergency and Critical Care Medicine, Hyogo Emergency Medical Center, 1-3-1 Wakinohamakaigandori, Chuo-ku, Kobe 651-0073, Japan
| | - Toshikazu Abe
- Department of Emergency and Critical Care Medicine, Tsukuba Memorial Hospital, 1187-299 Kaname, Tsukuba, Ibaraki 300-2622, Japan
- Department of Health Services Research, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan
| | - Tetsuya Sakamoto
- Department of Emergency Medicine, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-Ku, Tokyo 173-8606, Japan
| | - Yasuhiro Kuroda
- Department of Emergency, Disaster and Critical Care Medicine, Kagawa University Hospital, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan
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Smida T, Menegazzi JJ, Crowe RP, Bardes J, Scheidler JF, Salcido DD. Association of prehospital post-resuscitation peripheral oxygen saturation with survival following out-of-hospital cardiac arrest. Resuscitation 2022; 181:28-36. [PMID: 36272616 DOI: 10.1016/j.resuscitation.2022.10.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Hypoxia and hyperoxia following resuscitation from out-of-hospital cardiac arrest (OHCA)may cause harm by exacerbating secondary brain injury. Our objective was to retrospectively examine theassociationof prehospital post-ROSC hypoxia and hyperoxia with the primary outcome of survival to discharge home. METHODS We utilized the 2019-2021 ESO Data Collaborative public use research datasets for this study (ESO, Austin, TX). Average prehospital SpO2, lowest recorded prehospital SpO2, and hypoxia dose were calculated for each patient. Theassociationof these measures with survival was explored using multivariable logistic regression. We also evaluated theassociationof American Heart Association (AHA) and European Resuscitation Council (ERC) recommended post-ROSC SpO2 target ranges with outcome. RESULTS After application of exclusion criteria, 19,023 patients were included in this study. Of these, 52.3% experienced at least one episode of post-ROSC hypoxia (lowest SpO2 < 90%) and 19.6% experienced hyperoxia (average SpO2 > 98%). In comparison to normoxic patients, patients who were hypoxic on average (AHA aOR: 0.31 [0.25, 0.38]; ERC aOR: 0.34 [0.28, 0.42]) and patients who had a hypoxic lowest recorded SpO2 (AHA aOR: 0.48 [0.39, 0.59]; ERC aOR: 0.52 [0.42, 0.64]) had lower adjusted odds of survival. Patients who had a hyperoxic average SpO2 (AHA aOR: 0.75 [0.59, 0.96]; ERC aOR: 0.68 [0.53, 0.88]) and patients who had a hyperoxic lowest recorded SpO2 (AHA aOR: 0.66 [0.48, 0.92]; ERC aOR: 0.65 [0.46, 0.92]) also had lower adjusted odds of survival. CONCLUSION Prehospital post-ROSC hypoxia and hyperoxia were associated with worse outcomes in this dataset.
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Affiliation(s)
- Tanner Smida
- West Virginia University MD/PhD Program, Morgantown, WV, United States.
| | - James J Menegazzi
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, PA, United States
| | | | - James Bardes
- West Virginia University Department of Emergency Medicine, Morgantown, WV, United States
| | - James F Scheidler
- West Virginia University Department of Emergency Medicine, Morgantown, WV, United States
| | - David D Salcido
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, PA, United States
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Irfan FB, Consunji RIGDJ, Peralta R, El-Menyar A, Dsouza LB, Al-Suwaidi JM, Singh R, Castrén M, Djärv T, Alinier G. Comparison of in-hospital and out-of-hospital cardiac arrest of trauma patients in Qatar. Int J Emerg Med 2022; 15:52. [PMID: 36114456 PMCID: PMC9479227 DOI: 10.1186/s12245-022-00454-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 09/04/2022] [Indexed: 11/13/2022] Open
Abstract
Background Cardiac arrests in admitted hospital patients with trauma have not been described in the literature. We defined “in-hospital cardiac arrest of a trauma” (IHCAT) patient as “cessation of circulatory activity in a trauma patient confirmed by the absence of signs of circulation or abnormal cardiac arrest rhythm inside a hospital setting, which was not cardiac re-arrest.” This study aimed to compare epidemiology, clinical presentation, and outcomes between in- and out-of-hospital arrest resuscitations in trauma patients in Qatar. It was conducted as a retrospective cohort study including IHCAT and out-of-hospital trauma cardiac arrest (OHTCA) patients from January 2010 to December 2015 utilizing data from the national trauma registry, the out-of-hospital cardiac arrest registry, and the national ambulance service database. Results There were 716 traumatic cardiac arrest patients in Qatar from 2010 to 2015. A total of 410 OHTCA and 199 IHCAT patients were included for analysis. The mean annual crude incidence of IHCAT was 2.0 per 100,000 population compared to 4.0 per 100,000 population for OHTCA. The univariate comparative analysis between IHCAT and OHTCA patients showed a significant difference between ethnicities (p=0.04). With the exception of head injury, IHCAT had a significantly higher proportion of localization of injuries to anatomical regions compared to OHTCA; spinal injury (OR 3.5, 95% CI 1.5–8.3, p<0.004); chest injury (OR 2.62, 95% CI 1.62–4.19, p<0.00), and abdominal injury (OR 2.0, 95% CI 1.0–3.8, p<0.037). IHCAT patients had significantly higher hypovolemia (OR 1.66, 95% CI 1.18–2.35, p=0.004), higher mean Glasgow Coma Scale (GCS) score (OR 1.4, 95% CI 1.3–1.6, p<0.00), and a greater proportion of initial shockable rhythm (OR 3.51, 95% CI 1.6–7.7, p=0.002) and cardiac re-arrest (OR 6.0, 95% CI 3.3–10.8, p=<0.00) compared to OHTCA patients. Survival to hospital discharge was greater for IHCAT patients compared to OHTCA patients (OR 6.3, 95% CI 1.3–31.2, p=0.005). Multivariable analysis for comparison after adjustment for age and gender showed that IHCAT was associated with higher odds of spinal injury, abdominal injury, higher pre-hospital GCS, higher occurrence of cardiac re-arrest, and better survival than for OHTCA patients. IHCAT patients had a greater proportion of anatomically localized injuries indicating solitary injuries compared to greater polytrauma in OHTCA. In contrast, OHTCA patients had a higher proportion of diffuse blunt non-localizable polytrauma injuries that were severe enough to cause immediate or earlier onset of cardiac arrest. Conclusion In traumatic cardiac arrest patients, IHCAT was less common than OHTCA and might be related to a greater proportion of solitary localized anatomical blunt injuries (head/abdomen/chest/spine). In contrast, OHTCA patients were associated with diffuse blunt non-localizable polytrauma injuries with increased severity leading to immediate cardiac arrest. IHCAT was associated with a higher mean GCS score and a higher rate of initial shockable rhythm and cardiac re-arrest, and improved survival rates.
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Koller AC, Salcido DD, Genbrugge C, Menegazzi JJ. Sudden Electrocardiogram Rhythm Changes after Return of Spontaneous Circulation in Porcine Models of Out-of-Hospital Cardiac Arrest: A Phenomenological Report. PREHOSP EMERG CARE 2022; 28:87-91. [PMID: 36193987 PMCID: PMC10123171 DOI: 10.1080/10903127.2022.2132333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/19/2022] [Accepted: 09/26/2022] [Indexed: 10/31/2022]
Abstract
BACKGROUND Observation of the electrocardiogram (ECG) immediately following return of spontaneous circulation (ROSC) in resuscitated swine has revealed the interesting phenomenon of sudden ECG rhythm changes (SERC) that occur in the absence of pharmacological, surgical, or other medical interventions. OBJECTIVE We sought to identify, quantify, and characterize post-ROSC SERC in successfully resuscitated swine. METHODS We reviewed all LabChart data from resuscitated approximately 4- to 6-month-old swine used for various experimental protocols from 2006 to 2019. We identified those that achieved sustained ROSC and analyzed their entire post-ROSC periods for evidence of SERC in the ECG, and arterial and venous pressure tracings. Presence or absence of SERC was confirmed independently by two reviewers (ACK, DDS). We measured the interval from ROSC to first SERC, analyzed the following metrics, and calculated the change from 60 sec pre-SERC (or from ROSC if less than 60 sec) to 60 sec post-SERC: heart rate, central arterial pressure (CAP), and central venous pressure (CVP). RESULTS A total of 52 pigs achieved and sustained ROSC. Of these, we confirmed at least one SERC in 25 (48.1%). Two pigs (8%) each had two unique SERC events. Median interval from ROSC to first SERC was 3.8 min (inter-quartile range 1.0-6.9 min; range 16 sec to 67.5 min). We observed two distinct types of SERC: type 1) the post-SERC heart rate and arterial pressure increased (72% of cases); and type 2) the post-SERC heart rate and arterial pressure decreased (28% of cases). For type 1 cases, the mean (standard deviation [SD]) heart rate increased by 33.6 (45.7) beats per minute (bpm). The mean (SD) CAP increased by 20.6 (19.2) mmHg. For type 2 cases, the mean (SD) heart rate decreased by 39.7 (62.3) bpm. The mean (SD) CAP decreased by 21.9 (15.6) mmHg. CONCLUSIONS SERC occurred in nearly half of all cases with sustained ROSC and can occur multiple times per case. First SERC most often occurred within the first 4 minutes following ROSC. Heart rate, CAP, and CVP changed at the moment of SERC. We are proceeding to examine whether this phenomenon occurs in humans post-cardiac arrest and ROSC.
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Affiliation(s)
- Allison C. Koller
- University of Pittsburgh School of Medicine, Department of Emergency Medicine
| | - David D. Salcido
- University of Pittsburgh School of Medicine, Department of Emergency Medicine
| | | | - James J. Menegazzi
- University of Pittsburgh School of Medicine, Department of Emergency Medicine
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Zadorozny EV, Guyette FX, Flickinger KL, Martin-Gill C, Amoah K, Artist O, Mohammed A, Condle JP, Callaway CW, Elmer J, Coppler PJ. Time to specialty care and mortality after cardiac arrest. Am J Emerg Med 2021; 50:618-624. [PMID: 34879476 DOI: 10.1016/j.ajem.2021.09.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 08/03/2021] [Accepted: 09/10/2021] [Indexed: 01/19/2023] Open
Abstract
INTRODUCTION Out of hospital cardiac arrest (OHCA) patients are often transported to the closest emergency department (ED) or cardiac center for initial stabilization and may be transferred for further care. We investigated the effects of delay to transfer on in hospital mortality at a receiving facility. METHODS We included OHCA patients transported from the ED by a single critical care transport service to a quaternary care facility between 2010 and 2018. We calculated dwell time as time from arrest to critical care transport team contact. We abstracted demographics, arrest characteristics, and interventions started prior to transport arrival. For the primary analysis, we used logistic regression to determine the association of dwell time and in-hospital mortality. As secondary outcomes we investigated for associations of dwell time and mortality within 24 h of arrival, proximate cause of death among decedents, arterial pH and lactate on arrival, sum of worst SOFA subscales within 24 h of arrival, and rearrest during interfacility transport. RESULTS We included 572 OHCA patients transported from an outside ED to our facility. Median dwell time was 113 (IQR = 85-159) minutes. Measured in 30 min epochs, increasing dwell time was not associated with in-hospital mortality, 24-h mortality, cause of death and initial pH, but was associated with lower 24-h SOFA score (p = 0.01) and lower initial lactate (p = 0.03). Rearrest during transport was rare (n = 29, 5%). Dwell time was associated with lower probability of rearrest during transport (OR = 0.847, (95% CI 0.68-1.01), p = 0.07). CONCLUSIONS Dwell time was not associated with in-hospital mortality. Rapid transport may be associated with risk of rearrest. Prospective data are needed to clarify optimal patient stabilization and transport strategies.
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Affiliation(s)
- Eva V Zadorozny
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Francis X Guyette
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Katharyn L Flickinger
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Christian Martin-Gill
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Kaia Amoah
- Howard University College of Medicine, Washington, DC, USA
| | - Onaje Artist
- Howard University College of Medicine, Washington, DC, USA
| | | | - Joseph P Condle
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Clifton W Callaway
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Jonathan Elmer
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA; University of Pittsburgh School of Medicine, Department of Critical Care Medicine, Pittsburgh, Pennsylvania, USA; University of Pittsburgh School of Medicine, Department of Neurology, Pittsburgh, Pennsylvania, USA
| | - Patrick J Coppler
- University of Pittsburgh School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA.
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Jung YH, Jeung KW, Lee HY, Lee BK, Lee DH, Shin J, Lee HJ, Cho IS, Kim YM. Rearrest during hospitalisation in adult comatose out-of-hospital cardiac arrest patients: Risk factors and prognostic impact, and predictors of favourable long-term outcomes. Resuscitation 2021; 170:150-159. [PMID: 34871759 DOI: 10.1016/j.resuscitation.2021.11.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 11/04/2021] [Accepted: 11/27/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND Rearrest occurs commonly after initial resuscitation following out-of-hospital cardiac arrest (OHCA). We determined (1) the predictors of rearrest during hospitalisation that can be identified in the hours immediately after OHCA, (2) the association between rearrest and favourable long-term outcomes, and (3) the predictors of favourable long-term outcomes in rearrest patients. METHODS Conditional multivariable logistic regression analyses were performed using the Korean Hypothermia Network prospective registry data, which included details of adult OHCA patients treated with targeted temperature management at 22 teaching hospitals in South Korea. RESULTS Among the 1,233 patients, 260 (21.1%) experienced rearrest. Of the 192 patients resuscitated from first rearrest, 33 (17.2%) achieved 6-month favourable outcomes. Arrhythmia, heart failure, ST-segment elevation, lower initial Glasgow coma scale (GCS) motor score, higher initial lactate level, and antiarrhythmic drug use within 1 h were independently associated with rearrest. Higher lactate level and antiarrhythmic drug use were associated with shockable first rearrest, while arrhythmia, heart failure, ST-segment elevation, and lower GCS motor score were associated with non-shockable first rearrest. Rearrest was independently associated with a lower likelihood of 6-month favourable outcomes (P = 0.003). Initial shockable rhythm after OHCA, absence of diabetes, shorter cumulative time to restoration of spontaneous circulation, coronary angiography, and hypophosphataemia within 7 d were independently associated with 6-month favourable outcomes in the patients resuscitated from first rearrest. CONCLUSIONS Rearrest during hospitalisation after OHCA was inversely associated with 6-month favourable outcomes. We identified several risk factors for rearrest and prognostic factors for patients resuscitated from first rearrest.
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Affiliation(s)
- Yong Hun Jung
- Department of Emergency Medicine, Chonnam National University Hospital, 42 Jebong-ro, Dong-gu, Gwangju, Republic of Korea; Department of Emergency Medicine, Chonnam National University Medical School, 160 Baekseo-ro, Dong-gu, Gwangju, Republic of Korea
| | - Kyung Woon Jeung
- Department of Emergency Medicine, Chonnam National University Hospital, 42 Jebong-ro, Dong-gu, Gwangju, Republic of Korea; Department of Emergency Medicine, Chonnam National University Medical School, 160 Baekseo-ro, Dong-gu, Gwangju, Republic of Korea.
| | - Hyoung Youn Lee
- Trauma Centre, Chonnam National University Hospital, 42 Jebong-ro, Dong-gu, Gwangju, Republic of Korea
| | - Byung Kook Lee
- Department of Emergency Medicine, Chonnam National University Hospital, 42 Jebong-ro, Dong-gu, Gwangju, Republic of Korea; Department of Emergency Medicine, Chonnam National University Medical School, 160 Baekseo-ro, Dong-gu, Gwangju, Republic of Korea
| | - Dong Hun Lee
- Department of Emergency Medicine, Chonnam National University Hospital, 42 Jebong-ro, Dong-gu, Gwangju, Republic of Korea
| | - Jonghwan Shin
- Department of Emergency Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, 20 Boramae-ro 5-gil, Dongjak-gu, Seoul, Republic of Korea; Department of Emergency Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Hui Jai Lee
- Department of Emergency Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, 20 Boramae-ro 5-gil, Dongjak-gu, Seoul, Republic of Korea
| | - In Soo Cho
- Department of Emergency Medicine, Hanil General Hospital, 308 Uicheon-ro, Dobong-gu, Seoul, Republic of Korea
| | - Young-Min Kim
- Department of Emergency Medicine, College of Medicine, The Catholic University of Korea, 222 Banpodae-ro, Seocho-gu, Seoul, Republic of Korea
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21
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Yoon H, Ahn KO, Park JH, Lee SY. Effects of pre-hospital re-arrest on outcomes based on transfer to a heart attack centre in patients with out-of-hospital cardiac arrest. Resuscitation 2021; 170:107-114. [PMID: 34822934 DOI: 10.1016/j.resuscitation.2021.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 11/03/2021] [Accepted: 11/14/2021] [Indexed: 01/26/2023]
Abstract
AIM We aimed to investigate the interaction effects between transfer to a heart attack centre [HAC] and prehospital re-arrest on the clinical outcomes of patients with out-of-hospital cardiac arrest [OHCA]. METHODS We included adult patients with OHCA of presumed cardiac aetiology from January 2012 to December 2018. The main exposure variable was prehospital re-arrest, defined as recurrence of cardiac arrest with a loss of palpable pulse upon hospital arrival. The other exposure variable was the resuscitation capacity of the receiving hospital [HAC or Non-HAC]. The outcome variable was neurological recovery. A multivariable logistic regression was performed to determine the interaction effects. RESULTS The final analysis included 6935 patients. Of these, 21.9% (n = 1521) experienced prehospital re-arrest, whereas 41.3% (n = 2866) were transferred to a non-HAC. The prehospital re-arrest group associated with poor neurological recovery (adjusted odds ratio [AOR], 0.25; 95% confidence interval [CI], 0.21-0.29;). Transfer to an HAC had beneficial effects on neurological recovery (AOR, 3.40 [95% CI, 3.04-3.85]. In the interaction model, wherein prehospital re-arrest patients who were transferred to a non-HAC were used as reference, the AOR of prehospital re-arrest patients who were transferred to an HAC, non-re-arrest patients who were transferred to a non-HAC, and non-re-arrest patients who were transferred to a non-HAC was 2.41 (95% CI, 1.73-3.35), 3.09 (95% CI, 2.33-4.10), and 11.07 (95% CI, 8.40-14.59) respectively (interaction p = 0.001). CONCLUSION Transport to a heart attack centre was beneficial to the clinical outcomes of patients who achieved prehospital ROSC after OHCA. The magnitude of that benefit was significantly modified by whether prehospital re-arrest had occurred.
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Affiliation(s)
- Hanna Yoon
- Department of Emergency Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Laboratory of Emergency Medical Services, Seoul National University Hospital Biomedical Research Institute, Seoul, Republic of Korea
| | - Ki Ok Ahn
- Department of Emergency Medicine, Myongji Hospital, Hanyang University College of Medicine, Goyang, Republic of Korea.
| | - Jeong Ho Park
- Department of Emergency Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Laboratory of Emergency Medical Services, Seoul National University Hospital Biomedical Research Institute, Seoul, Republic of Korea
| | - Sun Young Lee
- Public Healthcare Centre, Seoul National University Hospital, Seoul, Republic of Korea; Laboratory of Emergency Medical Services, Seoul National University Hospital Biomedical Research Institute, Seoul, Republic of Korea
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22
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Piktel JS, Suen Y, Kouk S, Maleski D, Pawlowski G, Laurita KR, Wilson LD. Effect of Amiodarone and Hypothermia on Arrhythmia Substrates During Resuscitation. J Am Heart Assoc 2021; 10:e016676. [PMID: 33938226 PMCID: PMC8200710 DOI: 10.1161/jaha.120.016676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background Amiodarone is administered during resuscitation, but its antiarrhythmic effects during targeted temperature management are unknown. The purpose of this study was to determine the effect of both therapeutic hypothermia and amiodarone on arrhythmia substrates during resuscitation from cardiac arrest. Methods and Results We utilized 2 complementary models: (1) In vitro no‐flow global ischemia canine left ventricular transmural wedge preparation. Wedges at different temperatures (36°C or 32°C) were given 5 µmol/L amiodarone (36‐Amio or 32‐Amio, each n=8) and subsequently underwent ischemia and reperfusion. Results were compared with previous controls. Optical mapping was used to measure action potential duration, dispersion of repolarization (DOR), and conduction velocity (CV). (2) In vivo pig model of resuscitation. Pigs (control or targeted temperature management, 32–34°C) underwent ischemic cardiac arrest and were administered amiodarone (or not) after 8 minutes of ventricular fibrillation. In vitro: therapeutic hypothermia but not amiodarone prolonged action potential duration. During ischemia, DOR increased in the 32‐Amio group versus 32‐Alone (84±7 ms versus 40±7 ms, P<0.05) while CV slowed in the 32‐Amio group. Amiodarone did not affect CV, DOR, or action potential duration during ischemia at 36°C. Conduction block was only observed at 36°C (5/8 36‐Amio versus 6/7 36‐Alone, 0/8 32‐Amio, versus 0/7 32‐Alone). In vivo: QTc decreased upon reperfusion from ischemia that was ameliorated by targeted temperature management. Amiodarone did not worsen DOR or CV. Amiodarone suppressed rearrest caused by ventricular fibrillation (7/8 without amiodarone, 2/7 with amiodarone, P=0.041), but not pulseless electrical activity (2/8 without amiodarone, 5/7 with amiodarone, P=0.13). Conclusions Although amiodarone abolishes a beneficial effect of therapeutic hypothermia on ischemia‐induced DOR and CV, it did not worsen susceptibility to ventricular tachycardia/ventricular fibrillation during resuscitation.
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Affiliation(s)
- Joseph S Piktel
- Department of Emergency Medicine and The Heart and Vascular Research Center MetroHealth Campus Case Western Reserve University Cleveland OH
| | - Yi Suen
- Department of Emergency Medicine and The Heart and Vascular Research Center MetroHealth Campus Case Western Reserve University Cleveland OH
| | - Shalen Kouk
- Department of Emergency Medicine and The Heart and Vascular Research Center MetroHealth Campus Case Western Reserve University Cleveland OH
| | - Danielle Maleski
- Department of Emergency Medicine and The Heart and Vascular Research Center MetroHealth Campus Case Western Reserve University Cleveland OH
| | - Gary Pawlowski
- Department of Emergency Medicine and The Heart and Vascular Research Center MetroHealth Campus Case Western Reserve University Cleveland OH
| | - Kenneth R Laurita
- Department of Emergency Medicine and The Heart and Vascular Research Center MetroHealth Campus Case Western Reserve University Cleveland OH
| | - Lance D Wilson
- Department of Emergency Medicine and The Heart and Vascular Research Center MetroHealth Campus Case Western Reserve University Cleveland OH
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23
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Shin H, Kim G, Lee Y, Moon H, Choi H, Lee CA, Choi HJ, Park Y, Lee K, Jeong W. Can We Predict Good Survival Outcomes by Classifying Initial and Re-Arrest Rhythm Change Patterns in Out-of-Hospital Cardiac Arrest Settings? Cureus 2020; 12:e12019. [PMID: 33437558 PMCID: PMC7793532 DOI: 10.7759/cureus.12019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Objective The purpose of this study was to investigate whether a change in prehospital arrest rhythms could allow medical personnel to predict survival outcomes in patients who achieved a return of spontaneous circulation (ROSC) in the setting of out-of-hospital cardiac arrest (OHCA). Methods The design of this study was retrospective, multi-regional, observational, and cross-sectional with a determining period between August 2015 and July 2016. Cardiac arrest rhythms were defined as a shockable rhythm (S), which refers to ventricular fibrillation (VF) or pulseless ventricular tachycardia (pVT), and non-shockable rhythm (NS), which refers to pulseless electrical activity or asystole. Survival to admission, survival to discharge, and good cerebral performance category (CPC) (CPC 1 or 2) were defined as good survival outcomes. Results A total of 163 subjects were classified into four groups according to the rhythm change pattern: NS→NS (98), S→S (27), S→NS (23), and NS→S (15). NS→NS pattern was used as the reference in logistic regression analysis. In the case of survival to hospital admission, the odds ratio (OR) (95% CI) of the S→S pattern was the highest [12.63 (3.56-44.85), p: <0.001 by no correction] and [7.29 (1.96-27.10), p = 0.003 with adjusting]. In the case of survival to hospital discharge, the OR (95% CI) of the S→S pattern was the highest [37.14 (11.71-117.78), p: <0.001 by no correction] and [13.85 (3.69-51.97), p: <0.001 with adjusting]. In the case of good CPC (CPC 1 or 2) at discharge, the OR (95% CI) of the S→S pattern was the highest [96 (19.14-481.60), p: <0.001 by no correction] and [149.69 (19.51-1148.48), p: <0.001 with adjusting]. Conclusions The S→S group showed the highest correlation with survival to hospital admission, survival to hospital discharge, and good CPC (CPC 1 or 2) at discharge compared to the NS→NS group. Verifying changes in initial cardiac arrest rhythm and prehospital re-arrest (RA) rhythm patterns after prehospital ROSC can help us predict good survival outcomes in the OHCA setting.
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Affiliation(s)
- Heejun Shin
- Emergency Medicine, Soonchunhyang University Hospital Bucheon, Bucheon, KOR
| | - Giwoon Kim
- Emergency Medicine, Soonchunhyang University Hospital Bucheon, Bucheon, KOR
| | - Younghwan Lee
- Emergency Medicine, Soonchunhyang University Hospital Bucheon, Bucheon, KOR
| | - Hyungjun Moon
- Emergency Medicine, Soonchunhyang University Hospital Cheonan, Cheonan, KOR
| | - Hanjoo Choi
- Emergency Medicine, Dankook University Hospital, Cheonan, KOR
| | - Choung Ah Lee
- Emergency Medicine, Hallym University Dongtan Sacred Heart Hospital, Dongtan, KOR
| | - Hyuk Joong Choi
- Emergency Medicine, Hanyang University Guri Hospital, Guri, KOR
| | - Yongjin Park
- Emergency Medicine, Chosun University Hospital, Gwangju, KOR
| | - Kyoungmi Lee
- Emergency Medicine, Myongji Hospital, Goyang, KOR
| | - Wonjung Jeong
- Emergency Medicine, Catholic University of Korea St. Vincent's Hospital, Suwon, KOR
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24
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Youngquist ST, Tonna JE, Bartos JA, Johnson MA, Hoareau GL, Hutin A, Lamhaut L. Current Work in Extracorporeal Cardiopulmonary Resuscitation. Crit Care Clin 2020; 36:723-735. [DOI: 10.1016/j.ccc.2020.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Patients resuscitated from cardiac arrest require complex management. An organized approach to early postarrest care can improve patient outcomes. Priorities include completing a focused diagnostic work-up to identify and reverse the inciting cause of arrest, stabilizing cardiorespiratory instability to prevent rearrest, minimizing secondary brain injury, evaluating the risk and benefits of transfer to a specialty care center, and avoiding early neurologic prognostication.
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Towards the Prediction of Rearrest during Out-of-Hospital Cardiac Arrest. ENTROPY 2020; 22:e22070758. [PMID: 33286529 PMCID: PMC7517305 DOI: 10.3390/e22070758] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 11/23/2022]
Abstract
A secondary arrest is frequent in patients that recover spontaneous circulation after an out-of-hospital cardiac arrest (OHCA). Rearrest events are associated to worse patient outcomes, but little is known on the heart dynamics that lead to rearrest. The prediction of rearrest could help improve OHCA patient outcomes. The aim of this study was to develop a machine learning model to predict rearrest. A random forest classifier based on 21 heart rate variability (HRV) and electrocardiogram (ECG) features was designed. An analysis interval of 2 min after recovery of spontaneous circulation was used to compute the features. The model was trained and tested using a repeated cross-validation procedure, on a cohort of 162 OHCA patients (55 with rearrest). The median (interquartile range) sensitivity (rearrest) and specificity (no-rearrest) of the model were 67.3% (9.1%) and 67.3% (10.3%), respectively, with median areas under the receiver operating characteristics and the precision–recall curves of 0.69 and 0.53, respectively. This is the first machine learning model to predict rearrest, and would provide clinically valuable information to the clinician in an automated way.
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27
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Spigner MF, Benoit JL, Menegazzi JJ, McMullan JT. Prehospital Protocols for Post-Return of Spontaneous Circulation Are Highly Variable. PREHOSP EMERG CARE 2020; 25:191-195. [DOI: 10.1080/10903127.2020.1754979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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28
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Woo JH, Cho JS, Lee CA, Kim GW, Kim YJ, Moon HJ, Park YJ, Lee KM, Jeong WJ, Choi IK, Choi HJ, Choi HJ. Survival and Rearrest in out-of-Hospital Cardiac Arrest Patients with Prehospital Return of Spontaneous Circulation: A Prospective Multi-Regional Observational Study. PREHOSP EMERG CARE 2020; 25:59-66. [PMID: 32091295 DOI: 10.1080/10903127.2020.1733716] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE We aimed to determine the factors associated with rearrest after prehospital return of spontaneous circulation (ROSC) and examine the factors associated with survival despite rearrest. METHODS We conducted a prospective multi-regional observational study of out-of-hospital cardiac arrest (OHCA) patients between August 2015 and July 2016. Patients received prehospital advanced cardiovascular life support performed by emergency medical technicians (EMTs). EMTs were directly supervised by medical directors (physicians) via real-time smartphone video calls [Smart Advanced Life Support (SALS)]. The study participants were categorized into rearrest (+) and rearrest (-) groups depending on whether rearrest occurred after prehospital ROSC. After rearrest, patients were further classified as survivors or non-survivors at discharge. RESULTS SALS was performed in 1,711 OHCA patients. Prehospital ROSC occurred in 345 patients (20.2%); of these patients, 189 (54.8%) experienced rearrest [rearrest (+) group] and 156 did not experience rearrest [rearrest (-) group]. Multivariate analysis showed that a longer interval from collapse to first prehospital ROSC was independently associated with rearrest [odds ratio (OR) 1.081; 95% confidence interval (CI) 1.050-1.114]. The presence of an initial shockable rhythm was independently associated with survival after rearrest (OR 6.920; 95% CI 2.749-17.422). As a predictor of rearrest, the interval from collapse to first prehospital ROSC (cut-off: 24 min) had a sensitivity of 77% and a specificity of 54% (AUC = 0.715 [95% CI 0.661-0.769]). CONCLUSIONS A longer interval from collapse to first prehospital ROSC was associated with rearrest, and an initial shockable rhythm was associated with survival despite the occurrence of rearrest. Emergency medical service providers and physicians should be prepared to deal with rearrest when pulses are obtained late in the resuscitation.
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Szarpak L, Filipiak KJ, Mosteller L, Jaguszewski M, Smereka J, Ruetzler K, Ahuja S, Ladny JR. Survival, neurological and safety outcomes after out of hospital cardiac arrests treated by using prehospital therapeutic hypothermia: A systematic review and meta-analysis. Am J Emerg Med 2020; 42:168-177. [PMID: 32088060 DOI: 10.1016/j.ajem.2020.02.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/17/2020] [Accepted: 02/13/2020] [Indexed: 10/25/2022] Open
Affiliation(s)
- Lukasz Szarpak
- Lazarski University, Warsaw, Poland; Polish Society of Disaster Medicine, Warsaw, Poland.
| | | | - Lauretta Mosteller
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Milosz Jaguszewski
- First Department of Cardiology, Medical University of Gdansk, Gdansk, Poland
| | - Jacek Smereka
- Department of Emergency Medical Service, Wroclaw Medical University, Wroclaw, Poland
| | - Kurt Ruetzler
- Departments of General Anesthesiology and Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, USA
| | - Sanchit Ahuja
- Department of Anesthesiology, Pain Management & Perioperative Medicine, Henry Ford Health System, Detroit, Michigan & Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, USA
| | - Jerzy R Ladny
- Department of Emergency Medicine, Medical University of Bialystok, Bialystok, Poland
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Yamashita A, Kurosaki H, Takada K, Tanaka Y, Nishi T, Wato Y, Inaba H. Prehospital Epinephrine as a Potential Factor Associated with Prehospital Rearrest. PREHOSP EMERG CARE 2020; 24:741-750. [PMID: 32023141 DOI: 10.1080/10903127.2020.1725197] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objective: To investigate the impact of epinephrine on prehospital rearrest and re-attainment of prehospital return of spontaneous circulation (ROSC). Methods: Data for 9,292 (≥ 8 years) out-of-hospital cardiac arrest (OHCA) patients transported to hospitals by emergency medical services were collected in Ishikawa Prefecture, Japan during 2010-2018. Univariate and multivariable analyses were retrospectively performed for 1,163 patients with prehospital ROSC. Results: Of 1,163 patients, rearrest occurred in 272 (23.4%) but not in 891 (76.6%). Both single and multiple doses of epinephrine administered before prehospital ROSC (adjusted odds ratio (OR): 3.62, 95% confidence interval (CI): 2.42-5.46 for 1 mg, and 4.27, 2.58-6.79 for ≥ 2 mg) were main factors associated with rearrest. The association between initial and rearrest rhythms was significantly associated with epinephrine administration (p = 0.02). However, the rearrest rhythm was primarily associated with the initial rhythm (p < 0.01). The majority of patients with the non-shockable initial rhythm had pulseless electrical activity (PEA) as the rearrest rhythm, regardless of epinephrine administration (80.4% for administration, 81.6% for no administration). When the initial rhythm was shockable, the primary rearrest rhythms in patients with and without epinephrine administration before prehospital ROSC were PEA (52.2%) and ventricular fibrillation/pulseless ventricular tachycardia (56.8%), respectively. Only epinephrine administration after rearrest was associated with prehospital re-attainment of ROSC (adjusted OR: 2.49, 95% CI: 1.20-5.19). Stepwise multivariable logistic regression analyses revealed that neurologically favorable outcome was poorer in patients with rearrest than those without rearrest (9.9% vs. 25.0%, adjusted OR: 0.42, 95% CI: 0.23-0.73). The total prehospital doses of epinephrine were associated with poorer neurological outcome in a dose-dependent manner (adjusted OR: 0.22, 95% CI: 0.13-0.36 for 1 mg; 0.09, 0.04-0.19 for 2 mg; 0.03, 0.01-0.09 for ≥ 3 mg, no epinephrine as a reference). Transportation to hospitals with a unit for post-resuscitation care was associated with better neurological outcome (adjusted OR: 1.53, 95% CI: 1.02-2.32). Conclusions: The requirement for epinephrine administration before prehospital ROSC was associated with subsequent rearrest. Routine epinephrine administrations and rearrest were associated with poorer neurological outcome of OHCA patients with prehospital ROSC.
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Kim KH, Park JH, Ro YS, Shin SD, Song KJ, Hong KJ, Jeong J, Lee KW, Hong WP. Association Between Post-Resuscitation Coronary Angiography With and Without Intervention and Neurological Outcomes After Out-of-Hospital Cardiac Arrest. PREHOSP EMERG CARE 2019; 24:485-493. [DOI: 10.1080/10903127.2019.1668989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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Prognostic Factors for Re-Arrest with Shockable Rhythm during Target Temperature Management in Out-Of-Hospital Shockable Cardiac Arrest Patients. J Clin Med 2019; 8:jcm8091360. [PMID: 31480615 PMCID: PMC6780596 DOI: 10.3390/jcm8091360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/09/2019] [Accepted: 08/27/2019] [Indexed: 11/17/2022] Open
Abstract
Re-arrest during post-cardiac arrest care after the return of spontaneous circulation is not uncommon. However, little is known about the risk factors associated with re-arrest. A previous study failed to show a benefit of prophylactic antiarrhythmic drug infusion in all kinds of out-of-hospital cardiac arrest (OHCA) survivors. This study evaluated high-risk OHCA survivors who may have re-arrest with shockable rhythm during targeted temperature management (TTM). Medical records of consecutive OHCA survivors treated with TTM at four tertiary referral university hospitals in the Republic of Korea between January 2010 and December 2016 were retrospectively reviewed. Patients who did not have any shockable rhythm during cardiopulmonary resuscitation (CPR) or unknown initial rhythm were excluded. The primary outcome of interest was the recurrence of shockable cardiac arrest during TTM. There were 289 cases of initial shockable arrest rhythm and 132 cases of shockable rhythm during CPR. Of the 421 included patients, 11.4% of patients had a shockable re-arrest during TTM. Survival to discharge and good neurologic outcomes did not differ between non-shockable and shockable re-arrest patients (78.3% vs. 72.9%, p = 0.401; 53.1% vs. 54.2% p = 0.887). Initial serum magnesium level, ST segment depression or ventricular premature complex (VPC) in initial electrocardiography (ECG), prophylactic amiodarone infusion, and dopamine and norepinephrine infusion during TTM were significantly higher and more frequent in the shockable re-arrest group (all p values < 0.05). Normal ST and T wave in initial ECG was common in the non-shockable re-arrest group (p = 0.038). However, in multivariate logistic regression analysis, only VPC was an independent prognostic factor for shockable re-arrest (OR 2.806 (95% CI 1.276-6.171), p = 0.010). Initial VPC may be a prognostic risk factor for shockable re-arrest in OHCA survivors with shockable rhythm.
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Han KS, Kim SJ, Lee EJ, Lee SW. The effect of extracorporeal cardiopulmonary resuscitation in re-arrest after survival event: a retrospective analysis. Perfusion 2019; 35:39-47. [PMID: 31146644 DOI: 10.1177/0267659119850679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The objectives of this study were to 1) identify the risk factors for predicting re-arrest and 2) determine whether extracorporeal cardiopulmonary resuscitation results in better outcomes than conventional cardiopulmonary resuscitation for managing re-arrest in out-of-hospital cardiac arrest patients. METHODS This retrospective analysis was based on a prospective cohort. We included adult patients with non-traumatic out-of-hospital cardiac arrest who achieved a survival event. The primary measurement was re-arrest, defined as recurrent cardiac arrest within 24 hours after survival event. Multiple logistic regression analysis was used to predict re-arrest. Subgroup analysis was performed to evaluate the effect of extracorporeal cardiopulmonary resuscitation on the survival to discharge in out-of-hospital cardiac arrest patients who experienced re-arrest. RESULTS Of 534 patients suitable for inclusion, 203 (38.0%) were enrolled in the re-arrest group. Old age, prolonged advanced cardiac life support duration and the presence of hypotension at 0 hours after survival event were independent variables predicting re-arrest. In the re-arrest group, the extracorporeal cardiopulmonary resuscitation group (n = 25) showed better outcomes than the conventional cardiopulmonary resuscitation group. However, multiple logistic regression for predicting survival to discharge revealed that extracorporeal cardiopulmonary resuscitation was not an independent factor. Multiple logistic regression revealed that a hypotensive state at re-arrest was an independent risk factor for survival. CONCLUSION Alternative methods that reduce the advanced cardiac life support duration should be considered to prevent re-arrest and attain good outcomes in out-of-hospital cardiac arrest patients. Extracorporeal cardiopulmonary resuscitation for re-arrest tended to show a good outcome compared to conventional cardiopulmonary resuscitation for re-arrest. Avoiding or immediately correcting hypotension may prevent re-arrest and improve the outcome of re-arrested patients.
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Affiliation(s)
- Kap Su Han
- Department of Emergency Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Su Jin Kim
- Department of Emergency Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Eui Jung Lee
- Department of Emergency Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Sung Woo Lee
- Department of Emergency Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
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Nordseth T, Niles DE, Eftestøl T, Sutton RM, Irusta U, Abella BS, Berg RA, Nadkarni VM, Skogvoll E. Rhythm characteristics and patterns of change during cardiopulmonary resuscitation for in-hospital paediatric cardiac arrest. Resuscitation 2019; 135:45-50. [PMID: 30639791 DOI: 10.1016/j.resuscitation.2019.01.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/05/2018] [Accepted: 01/03/2019] [Indexed: 11/29/2022]
Abstract
During paediatric cardiopulmonary resuscitation (CPR), patients may transition between pulseless electrical activity (PEA), asystole, ventricular fibrillation/tachycardia (VF/VT), and return of spontaneous circulation (ROSC). The aim of this study was to quantify the dynamic characteristics of this process. METHODS ECG recordings were collected in patients who received CPR at the Children's Hospital of Philadelphia (CHOP) between 2006 and 2013. Transitions between PEA (including bradycardia with poor perfusion), VF/VT, asystole, and ROSC were quantified by applying a multi-state statistical model with competing risks, and by smoothing the Nelson-Aalen estimator of cumulative hazard. RESULTS Seventy-four episodes of cardiac arrest were included. Median age of patients was 15 years [IQR 11-17], 50% were female and 62% had a respiratory aetiology of arrest. Presenting cardiac arrest rhythms were PEA (60%), VF/VT (24%) and asystole (16%). A temporary surge of PEA was observed between 10 and 15 min due to a doubling of the transition rate from ROSC to PEA (i.e. 're-arrests'). The prevalence of sustained ROSC reached an asymptotic value of 30% at 20 min. Simulation suggests that doubling the transition rate from PEA to ROSC and halving the relapse rate might increase the prevalence of sustained ROSC to 50%. CONCLUSION Children and adolescents who received CPR were prone to re-arrest between 10 and 15 min after start of CPR efforts. If the rate of PEA to ROSC transition could be increased and the rate of re-arrests reduced, the overall survival rate may improve.
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Affiliation(s)
- Trond Nordseth
- Department of Emergency Medicine and Prehospital Services, St.Olav Hospital, Trondheim, Norway; Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway.
| | - Dana E Niles
- Department of Anesthesiology and Critical Care Medicine, The Children's Hospital of Philadelphia, Philadelphia, USA
| | - Trygve Eftestøl
- Department of Electrical Engineering and Computer Science, University of Stavanger, Stavanger, Norway
| | - Robert M Sutton
- Department of Anesthesiology and Critical Care Medicine, The Children's Hospital of Philadelphia, Philadelphia, USA
| | - Unai Irusta
- Department of Communications Engineering, University of the Basque Country, Bilbao, Spain
| | - Benjamin S Abella
- Center for Resuscitation Science, University of Pennsylvania, Philadelphia, USA
| | - Robert A Berg
- Department of Anesthesiology and Critical Care Medicine, The Children's Hospital of Philadelphia, Philadelphia, USA
| | - Vinay M Nadkarni
- Department of Anesthesiology and Critical Care Medicine, The Children's Hospital of Philadelphia, Philadelphia, USA
| | - Eirik Skogvoll
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway; Department of Anaesthesia and Intensive Care Medicine, St.Olav Hospital, Trondheim, Norway
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Jentzer JC. Cardiac arrest: A recurrent problem. Am Heart J 2018; 202:137-138. [PMID: 29859616 DOI: 10.1016/j.ahj.2018.03.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 03/27/2018] [Indexed: 06/08/2023]
Affiliation(s)
- Jacob C Jentzer
- Department of Cardiovascular Medicine, The Mayo Clinic, Rochester, MN.
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Abstract
Cardiac arrest is the most common cause of death in North America. An organized bundle of neurocritical care interventions can improve chances of survival and neurological recovery in patients who are successfully resuscitated from cardiac arrest. Therefore, resuscitation following cardiac arrest was chosen as an Emergency Neurological Life Support protocol. Key aspects of successful early post-arrest management include: prevention of secondary brain injury; identification of treatable causes of arrest in need of emergent intervention; and, delayed neurological prognostication. Secondary brain injury can be attenuated through targeted temperature management (TTM), avoidance of hypoxia and hypotension, avoidance of hyperoxia, hyperventilation or hypoventilation, and treatment of seizures. Most patients remaining comatose after resuscitation from cardiac arrest should undergo TTM. Treatable precipitants of arrest that require emergent intervention include, but are not limited to, acute coronary syndrome, intracranial hemorrhage, pulmonary embolism and major trauma. Accurate neurological prognostication is generally not appropriate for several days after cardiac arrest, so early aggressive care should never be limited based on perceived poor neurological prognosis.
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Affiliation(s)
- Jonathan Elmer
- Department of Emergency Medicine, University of Pittsburgh School of Medicine, Iroquois Building, Suite 400A, 3600 Forbes Avenue, Pittsburgh, PA, 15213, USA.
- Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
| | - Kees H Polderman
- Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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de Freitas JANLF, Dos Santos Costa Leomil F, Zoccoler M, Antoneli PC, de Oliveira PX. Cardiomyocyte lethality by multidirectional stimuli. Med Biol Eng Comput 2018; 56:2177-2184. [PMID: 29845489 DOI: 10.1007/s11517-018-1848-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 05/16/2018] [Indexed: 10/16/2022]
Abstract
Multidirectional defibrillation protocols have shown better efficiency than monodirectional; still, no testing was performed to assess cell lethality. We investigated lethality of multidirectional defibrillator-like shocks on isolated cardiomyocytes. Cells were isolated from adult male Wistar rats and plated into a perfusion chamber. Electrical field stimulation threshold (ET) was obtained, and cells were paced with suprathreshold bipolar electrical field (E) pulses. Either one monodirectional high-intensity electrical field (HEF) pulse aligned at 0° (group Mono0) or 60° (group Mono60) to cell major axis or a multidirectional sequence of three HEF pulses aligned at 0°, 60°, and 120° each was applied. If cell recovered from shock, pacing was resumed, and a higher amplitude HEF, proportional to ET, was applied. The sequence was repeated until cell death. Lethality curves were built by means of survival analysis from sub-lethal and lethal E. Non-linear fit was performed, and E values corresponding to 50% probability of lethality (E50) were compared. Multidirectional groups presented lethality curves similar to Mono0. Mono60 displayed the highest E50. The novel data endorse the idea of multidirectional stimuli being safer because their effects on lethality of individual cells were equal to a single monodirectional stimulus, while their defibrillatory threshold is lower. Graphical abstract Monodirectional and multidirectional lethality protocol comparison on isolated rat cardiomyocytes. The heart image is a derivative of "3D Heart in zBrush" ( https://vimeo.com/65568770 ) by Laloxl, used under CC BY 3.0 ( https://creativecommons.org/licenses/by/3.0/legalcode )/image extracted from original video.
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Affiliation(s)
| | | | - Marcelo Zoccoler
- Department of Biomedical Engineering, School of Electrical and Computer Engineering, University of Campinas, São Paulo, Brazil.
| | - Priscila Correia Antoneli
- Department of Biomedical Engineering, School of Electrical and Computer Engineering, University of Campinas, São Paulo, Brazil
| | - Pedro Xavier de Oliveira
- Department of Biomedical Engineering, School of Electrical and Computer Engineering, University of Campinas, São Paulo, Brazil.,Center for Biomedical Engineering, University of Campinas, Campinas, São Paulo, Brazil
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Salcido DD, Schmicker RH, Kime N, Buick JE, Cheskes S, Grunau B, Zellner S, Zive D, Aufderheide TP, Koller AC, Herren H, Nuttall J, Sundermann ML, Menegazzi JJ. Effects of intra-resuscitation antiarrhythmic administration on rearrest occurrence and intra-resuscitation ECG characteristics in the ROC ALPS trial. Resuscitation 2018; 129:6-12. [PMID: 29803703 DOI: 10.1016/j.resuscitation.2018.05.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 05/11/2018] [Accepted: 05/23/2018] [Indexed: 12/25/2022]
Abstract
BACKGROUND Intra-resuscitation antiarrhythmic drugs may improve resuscitation outcomes, in part by avoiding rearrest, a condition associated with poor out-of-hospital cardiac arrest (OHCA) outcomes. However, antiarrhythmics may also alter defibrillation threshold. The objective of this study was to investigate the relationship between rearrest and intra-resuscitation antiarrhythmic drugs in the context of the Resuscitation Outcomes Consortium (ROC) amiodarone, lidocaine, and placebo (ALPS) trial. HYPOTHESIS Rearrest rates would be lower in cases treated with amiodarone or lidocaine, versus saline placebo, prior to first return of spontaneous circulation (ROSC). We also hypothesized antiarrhythmic effects would be quantifiable through analysis of the prehospital electrocardiogram. METHODS We conducted a secondary analysis of the ROC ALPS trial. Cases that first achieved prehospital ROSC after randomized administration of study drug were included in the analysis. Rearrest, defined as loss of pulses following ROSC, was ascertained from emergency medical services records. Rearrest rate was calculated overall, as well as by ALPS treatment group. Multivariable logistic regression models were constructed to assess the association between treatment group and rearrest, as well as rearrest and both survival to hospital discharge and survival with neurologic function. Amplitude spectrum area, median slope, and centroid frequency of the ventricular fibrillation (VF) ECG were calculated and compared across treatment groups. RESULTS A total of 1144 (40.4%) cases with study drug prior to first ROSC were included. Rearrest rate was 44.0% overall; 42.9% for placebo, 45.7% for lidocaine, and 43.0% for amiodarone. In multivariable logistic regression models, ALPS treatment group was not associated with rearrest, though rearrest was associated with poor survival and neurologic outcomes. AMSA and median slope measures of the first available VF were associated with rearrest case status, while median slope and centroid frequency were associated with ALPS treatment group. CONCLUSION Rearrest rates did not differ between antiarrhythmic and placebo treatment groups. ECG waveform characteristics were correlated with treatment group and rearrest. Rearrest was inversely associated with survival and neurologic outcomes.
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Affiliation(s)
| | | | - Noah Kime
- University of Washington, Seattle, WA, United States
| | - Jason E Buick
- Rescu, Li Ka Shing Knowledge Institute, St. Michael's Hospital University of Toronto, Toronto, ON, Canada; Institute of Health Policy, Management and Evaluation, Faculty of Medicine, University of Toronto, Toronto ON, Canada
| | - Sheldon Cheskes
- Sunnybrook Center for Prehospital Medicine, Toronto, ON, Canada
| | - Brian Grunau
- University of British Columbia, Vancouver, BC, Canada
| | | | - Dana Zive
- Oregon Health Sciences University, Portland, OR, United States
| | | | | | | | - Jack Nuttall
- Oregon Health Sciences University, Portland, OR, United States
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Scales DC, Cheskes S, Verbeek PR, Pinto R, Austin D, Brooks SC, Dainty KN, Goncharenko K, Mamdani M, Thorpe KE, Morrison LJ. Prehospital cooling to improve successful targeted temperature management after cardiac arrest: A randomized controlled trial. Resuscitation 2017; 121:187-194. [PMID: 28988962 DOI: 10.1016/j.resuscitation.2017.10.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 09/25/2017] [Accepted: 10/02/2017] [Indexed: 12/22/2022]
Abstract
RATIONALE Targeted temperature management (TTM) improves survival with good neurological outcome after out-of-hospital cardiac arrest (OHCA), but is delivered inconsistently and often with delay. OBJECTIVE To determine if prehospital cooling by paramedics leads to higher rates of 'successful TTM', defined as achieving a target temperature of 32-34°C within 6h of hospital arrival. METHODS Pragmatic RCT comparing prehospital cooling (surface ice packs, cold saline infusion, wristband reminders) initiated 5min after return of spontaneous circulation (ROSC) versus usual resuscitation and transport. The primary outcome was rate of 'successful TTM'; secondary outcomes were rates of applying TTM in hospital, survival with good neurological outcome, pulmonary edema in emergency department, and re-arrest during transport. RESULTS 585 patients were randomized to receive prehospital cooling (n=279) or control (n=306). Prehospital cooling did not increase rates of 'successful TTM' (30% vs 25%; RR, 1.17; 95% confidence interval [CI] 0.91-1.52; p=0.22), but increased rates of applying TTM in hospital (68% vs 56%; RR, 1.21; 95%CI 1.07-1.37; p=0.003). Survival with good neurological outcome (29% vs 26%; RR, 1.13, 95%CI 0.87-1.47; p=0.37) was similar. Prehospital cooling was not associated with re-arrest during transport (7.5% vs 8.2%; RR, 0.94; 95%CI 0.54-1.63; p=0.83) but was associated with decreased incidence of pulmonary edema in emergency department (12% vs 18%; RR, 0.66; 95%CI 0.44-0.99; p=0.04). CONCLUSIONS Prehospital cooling initiated 5min after ROSC did not increase rates of achieving a target temperature of 32-34°C within 6h of hospital arrival but was safe and increased application of TTM in hospital.
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Affiliation(s)
- D C Scales
- Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; Interdepartmental Division of Critical Care, Department of Medicine, University of Toronto, Toronto, Ontario, Canada; Institute for Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Institute of Clinical and Evaluative Sciences, Toronto, Ontario, Canada.
| | - S Cheskes
- Division of Emergency Medicine, Department of Medicine, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Centre for Prehospital Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - P R Verbeek
- Division of Emergency Medicine, Department of Medicine, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Centre for Prehospital Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - R Pinto
- Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - D Austin
- Department of Emergency Medicine, Markham Stouffville Hospital, Markham, Ontario, Canada
| | - S C Brooks
- Department of Emergency Medicine, Faculty of Health Sciences Queen's University, Kingston, Ontario, Canada; Rescu, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - K N Dainty
- Institute for Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Rescu, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - K Goncharenko
- Rescu, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - M Mamdani
- Applied Health Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - K E Thorpe
- Applied Health Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - L J Morrison
- Institute for Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Division of Emergency Medicine, Department of Medicine, University of Toronto, Toronto, Ontario, Canada; Rescu, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
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40
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Salcido DD, Schmicker RH, Buick JE, Cheskes S, Grunau B, Kudenchuk P, Leroux B, Zellner S, Zive D, Aufderheide TP, Koller AC, Herren H, Nuttall J, Sundermann ML, Menegazzi JJ. Compression-to-ventilation ratio and incidence of rearrest-A secondary analysis of the ROC CCC trial. Resuscitation 2017; 115:68-74. [PMID: 28392369 DOI: 10.1016/j.resuscitation.2017.04.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/14/2017] [Accepted: 04/03/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND Previous work has demonstrated that when out-of-hospital cardiac arrest (OHCA) patients achieve return of spontaneous circulation (ROSC), but subsequently have another cardiac arrest prior to hospital arrival (rearrest), the probability of survival to hospital discharge is significantly decreased. Additionally, few modifiable factors for rearrest are known. We sought to examine the association between rearrest and compression-to-ventilation ratio during cardiopulmonary resuscitation (CPR) and to confirm the association between rearrest and outcomes. HYPOTHESIS Rearrest incidence would be similar between cases treated with 30:2 or continuous chest compression (CCC) CPR, but inversely related to survival and good neurological outcome. METHODS We conducted a secondary analysis of a large randomized-controlled trial of CCC versus 30:2 CPR for the treatment of OHCA between 2011 and 2015 among 8 sites of the Resuscitation OUTCOMES: Consortium (ROC). Patients were randomized through an emergency medical services (EMS) agency-level cluster randomization design to receive either 30:2 or CCC CPR. Case data were derived from prehospital patient care reports, digital defibrillator files, and hospital records. The primary analysis was an as-treated comparison of the proportion of patients with a rearrest for patients who received 30:2 versus those who received CCC. In addition, we assessed the association between rearrest and both survival to hospital discharge and favorable neurological outcome (Modified Rankin Score≤3) in patients with and without ROSC upon ED arrival using multivariable logistic regression adjusting for age, sex, initial rhythm and measures of CPR quality. RESULTS There were 14,109 analyzable cases that were determined to have definitively received either CCC or 30:2 CPR. Of these, 4713 had prehospital ROSC and 2040 (43.2%) had at least one rearrest. Incidence of rearrest was not significantly different between patients receiving CCC and 30:2 (44.1% vs 41.8%; adjusted OR: 1.01; 95% CI: 0.88, 1.16). Rearrest was significantly associated with lower survival (23.3% vs 36.9%; adjusted OR: 0.46; 95%CI: 0.36-0.51) and worse neurological outcome (19.4% vs 30.2%; adjusted OR: 0.46; 95%CI: 0.38, 0.55). CONCLUSION Rearrest occurrence was not significantly different between patients receiving CCC and 30:2, and was inversely associated with survival to hospital discharge and MRS.
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Affiliation(s)
| | | | | | - Sheldon Cheskes
- Sunnybrook Center for Prehospital Medicine, Toronto, ON, Canada
| | - Brian Grunau
- University of British Columbia, Vancouver, BC, Canada
| | | | - Brian Leroux
- University of Washington, Seattle, WA, United States
| | | | - Dana Zive
- Oregon Health Sciences University, Portland, OR, United States
| | | | | | | | - Jack Nuttall
- Oregon Health Sciences University, Portland, OR, United States
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Bhardwaj A, Ikeda DJ, Grossestreuer AV, Sheak KR, Delfin G, Layden T, Abella BS, Leary M. Factors associated with re-arrest following initial resuscitation from cardiac arrest. Resuscitation 2016; 111:90-95. [PMID: 27992736 DOI: 10.1016/j.resuscitation.2016.12.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 12/06/2016] [Accepted: 12/09/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND To examine patient- and arrest-level factors associated with the incidence of re-arrest in the hospital setting, and to measure the association between re-arrest and survival to discharge. METHODS This work represents a retrospective cohort study of adult patients who were successfully resuscitated from an initial out-of-hospital cardiac arrest (OHCA) or in-hospital cardiac arrest (ICHA) of non-traumatic origin at two urban academic medical centers. In this study, re-arrest was defined as loss of a pulse following 20min of sustained return of spontaneous circulation (ROSC). RESULTS Between 01/2005 and 04/2016, 1961 patients achieved ROSC following non-traumatic cardiac arrest. Of those, 471 (24%) experienced at least one re-arrest. In re-arrest patients, the median time from initial ROSC to first re-arrest was 5.4h (IQR: 1.1, 61.8). The distribution of initial rhythms between single- and re-arrest patients did not vary, nor did the median duration of initial arrest. Among 108 re-arrest patients with an initial shockable rhythm, 60 (56%) experienced a shockable re-arrest rhythm. Among 273 with an initial nonshockable rhythm, 31 (11%) experienced a shockable re-arrest rhythm. After adjusting for significant covariates, the incidence of re-arrest was associated with a lower likelihood of survival to discharge (OR: 0.32; 95% CI: 0.24-0.43; p<0.001). CONCLUSIONS Re-arrest is a common complication experienced by cardiac arrest patients that achieve ROSC, and occurs early in the course of their post-arrest care. Moreover, re-arrest is associated with a decreased likelihood of survival to discharge, even after adjustments for relevant covariates.
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Affiliation(s)
- Abhishek Bhardwaj
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Penn Presbyterian Medical Center, University of Pennsylvania Health System, Philadelphia, PA, USA
| | - Daniel J Ikeda
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Anne V Grossestreuer
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Leonard Davis Institute for Health Economics, University of Pennsylvania, Philadelphia, PA, USA; Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA, USA; Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Kelsey R Sheak
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Gail Delfin
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Timothy Layden
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Benjamin S Abella
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Marion Leary
- Center for Resuscitation Science and Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; School of Nursing, University of Pennsylvania, Philadelphia, PA, USA.
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The daily incidence of out-of-hospital cardiac arrest unexpectedly increases around New Year's Day in Japan. Resuscitation 2015; 96:156-62. [DOI: 10.1016/j.resuscitation.2015.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 08/03/2015] [Accepted: 08/04/2015] [Indexed: 11/24/2022]
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Olasveengen TM, Kramer-Johansen J. Insight into the black hole currently characterizing the initial post arrest phase. Resuscitation 2014; 87:A3-4. [PMID: 25486281 DOI: 10.1016/j.resuscitation.2014.11.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 11/27/2014] [Indexed: 11/16/2022]
Affiliation(s)
- Theresa M Olasveengen
- Department of Research and Development and Department of Anesthesiology, Division of Emergencies and Critical Care, Oslo University Hospital and University of Oslo, P.O. Box 4956 Nydalen, N-0424 Oslo, Norway.
| | - Jo Kramer-Johansen
- Norwegian National Advisory Unit on Prehospital Emergency Medicine (NAKOS) and Department of Anesthesiology, Oslo University Hospital and University of Oslo, P.O. Box 4956 Nydalen, N-0424 Oslo, Norway
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