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Bachista KM, Moore JC, Labarère J, Crowe RP, Emanuelson LD, Lick CJ, Debaty GP, Holley JE, Quinn RP, Scheppke KA, Pepe PE. Survival for Nonshockable Cardiac Arrests Treated With Noninvasive Circulatory Adjuncts and Head/Thorax Elevation. Crit Care Med 2024; 52:170-181. [PMID: 38240504 DOI: 10.1097/ccm.0000000000006055] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
OBJECTIVES Cardiac arrests remain a leading cause of death worldwide. Most patients have nonshockable electrocardiographic presentations (asystole/pulseless electrical activity). Despite well-performed basic and advanced cardiopulmonary resuscitation (CPR) interventions, patients with these presentations have always faced unlikely chances of survival. The primary objective was to determine if, in addition to conventional CPR (C-CPR), expeditious application of noninvasive circulation-enhancing adjuncts, and then gradual elevation of head and thorax, would be associated with higher likelihoods of survival following out-of-hospital cardiac arrest (OHCA) with nonshockable presentations. DESIGN Using a prospective observational study design (ClinicalTrials.gov NCT05588024), patient data from the national registry of emergency medical services (EMS) agencies deploying the CPR-enhancing adjuncts and automated head/thorax-up positioning (AHUP-CPR) were compared with counterpart reference control patient data derived from the two National Institutes of Health clinical trials that closely monitored quality CPR performance. Beyond unadjusted comparisons, propensity score matching and matching of time to EMS-initiated CPR (TCPR) were used to assemble cohorts with corresponding best-fit distributions of the well-established characteristics associated with OHCA outcomes. SETTING North American 9-1-1 EMS agencies. PATIENTS Adult nontraumatic OHCA patients receiving 9-1-1 responses. INTERVENTIONS In addition to C-CPR, study patients received the CPR adjuncts and AHUP (all U.S. Food and Drug Administration-cleared). MEASUREMENTS AND MAIN RESULTS The median TCPR for both AHUP-CPR and C-CPR groups was 8 minutes. Median time to AHUP initiation was 11 minutes. Combining all patients irrespective of lengthier response intervals, the collective unadjusted likelihood of AHUP-CPR group survival to hospital discharge was 7.4% (28/380) vs. 3.1% (58/1,852) for C-CPR (odds ratio [OR], 2.46 [95% CI, 1.55-3.92]) and, after propensity score matching, 7.6% (27/353) vs. 2.8% (10/353) (OR, 2.84 [95% CI, 1.35-5.96]). Faster AHUP-CPR application markedly amplified odds of survival and neurologically favorable survival. CONCLUSIONS These findings indicate that, compared with C-CPR, there are strong associations between rapid AHUP-CPR treatment and greater likelihood of patient survival, as well as survival with good neurological function, in cases of nonshockable OHCA.
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Affiliation(s)
- Kerry M Bachista
- Department of Emergency Medicine, Mayo Clinic Alix School of Health Sciences, Mayo Clinic in Florida, Jacksonville, FL
| | - Johanna C Moore
- Hennepin Healthcare, Department of Emergency Medicine, University of Minnesota School of Medicine, Minneapolis, MN
| | - José Labarère
- Quality of Care Unit, Université Grenoble Alpes, Grenoble, France
| | | | - Lauren D Emanuelson
- Division of Quality Improvement and Compliance, Advanced Medical Transport of Central Illinois, Peoria, IL
| | - Charles J Lick
- Division of Emergency Medical Services, Allina Health, Minneapolis, MN
| | - Guillaume P Debaty
- Department of Emergency Medicine, University Hospital of Grenoble Alpes, Grenoble, France
| | - Joseph E Holley
- Memphis Fire Department, City of Memphis, TN
- Division of Emergency Medical Services, State of Tennessee Department of Health, Nashville, TN
| | - Ryan P Quinn
- EMS Division, City of Edina Fire Department, Edina, MN
| | - Kenneth A Scheppke
- Florida Department of Health, Tallahassee, FL
- Office of the Medical Director, Palm Beach County Fire Rescue, West Palm Beach, FL
| | - Paul E Pepe
- Department of Emergency Medicine, Mayo Clinic Alix School of Health Sciences, Mayo Clinic in Florida, Jacksonville, FL
- Emergency Medical Services Division, St. Johns County Fire Rescue, St. Augustine, FL
- Hennepin Healthcare, Department of Emergency Medicine, University of Minnesota School of Medicine, Minneapolis, MN
- Quality of Care Unit, Université Grenoble Alpes, Grenoble, France
- Clinical and Operational Research, ESO, Austin, TX
- Division of Quality Improvement and Compliance, Advanced Medical Transport of Central Illinois, Peoria, IL
- Division of Emergency Medical Services, Allina Health, Minneapolis, MN
- Department of Emergency Medicine, University Hospital of Grenoble Alpes, Grenoble, France
- Memphis Fire Department, City of Memphis, TN
- Division of Emergency Medical Services, State of Tennessee Department of Health, Nashville, TN
- EMS Division, City of Edina Fire Department, Edina, MN
- Florida Department of Health, Tallahassee, FL
- Office of the Medical Director, Palm Beach County Fire Rescue, West Palm Beach, FL
- Department of Management, Policy and Community Health, University of Texas Health Sciences Center, Houston, School of Public Health, Houston, TX
- Dallas County Fire Rescue Department, Dallas County, Dallas, TX
- Executive Offices, Metropolitan EMS Medical Directors Global Alliance, Fort Lauderdale, FL
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Liu JZ, Counts CR, Drucker CJ, Emert JM, Murphy DL, Schwarcz L, Kudenchuk PJ, Sayre MR, Rea TD. Acute SARS-CoV-2 Infection and Incidence and Outcomes of Out-of-Hospital Cardiac Arrest. JAMA Netw Open 2023; 6:e2336992. [PMID: 37801312 PMCID: PMC10559182 DOI: 10.1001/jamanetworkopen.2023.36992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/28/2023] [Indexed: 10/07/2023] Open
Abstract
Importance Little is known about how COVID-19 affects the incidence or outcomes of out-of-hospital cardiac arrest (OHCA), and it is possible that more generalized factors beyond SARS-CoV-2 infection are primarily responsible for changes in OHCA incidence and outcome. Objective To assess whether COVID-19 is associated with OHCA incidence and outcomes. Design, Setting, and Participants This retrospective cohort study was conducted in Seattle and King County, Washington. Participants included persons aged 18 years or older with nontraumatic OHCA attended by emergency medical services (EMS) between January 1, 2018, and December 31, 2021. Data analysis was performed from November 2022 to March 2023. Exposures Prepandemic (2018-2019) and pandemic (2020-2021) periods and SARS-CoV-2 infection. Main Outcomes and Measures The primary outcomes were OHCA incidence and patient outcomes (ie, survival to hospital discharge). Mediation analysis was used to determine the percentage change in OHCA incidence and outcomes between prepandemic and pandemic periods that was attributable to acute SARS-CoV-2 infection vs conventional Utstein elements related to OHCA circumstances (ie, witness status and OHCA location) and resuscitation care (ie, bystander cardiopulmonary resuscitation, early defibrillation, and EMS response intervals). Results There were a total of 13 081 patients with OHCA (7102 dead upon EMS arrival and 5979 EMS treated). Among EMS-treated patients, the median (IQR) age was 64.0 (51.0-75.0) years, 3864 (64.6%) were male, and 1027 (17.2%) survived to hospital discharge. The total number of patients with OHCA increased by 19.0% (from 5963 in the prepandemic period to 7118 in the pandemic period), corresponding to an incidence increase from 168.8 to 195.3 events per 100 000 person-years. Of EMS-treated patients with OHCA during the pandemic period, 194 (6.2%) were acutely infected with SARS-CoV-2 compared with 7 of 191 EMS-attended but untreated patients with OHCA (3.7%). In time-series correlation analysis, there was a positive correlation between community SARS-CoV-2 incidence and overall OHCA incidence (r = 0.27; P = .01), as well as OHCA incidence with acute SARS-CoV-2 infection (r = 0.43; P < .001). The survival rate during the pandemic period was lower than that in the prepandemic period (483 patients [15.4%] vs 544 patients [19.2%]). During the pandemic, those with OHCA and acute SARS-CoV-2 infection had lower likelihood of survival compared with those without acute infection (12 patients [6.2%] vs 471 patients [16.0%]). SARS-CoV-2 infection itself accounted for 18.5% of the pandemic survival decline, whereas Utstein elements mediated 68.2% of the survival decline. Conclusions and Relevance In this cohort study of COVID-19 and OHCA, a substantial proportion of the higher OHCA incidence and lower survival during the pandemic was not directly due to SARS-CoV-2 infection but indirect factors that challenged OHCA prevention and treatment.
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Affiliation(s)
- Jennifer Z Liu
- Emergency Medical Services Division, Public Health-Seattle & King County, Seattle, Washington
| | - Catherine R Counts
- Seattle Fire Department, Seattle, Washington
- Department of Emergency Medicine, University of Washington, Seattle
| | - Christopher J Drucker
- Emergency Medical Services Division, Public Health-Seattle & King County, Seattle, Washington
| | - Jamie M Emert
- Emergency Medical Services Division, Public Health-Seattle & King County, Seattle, Washington
| | - David L Murphy
- Emergency Medical Services Division, Public Health-Seattle & King County, Seattle, Washington
- Department of Emergency Medicine, University of Washington, Seattle
| | - Leilani Schwarcz
- Emergency Medical Services Division, Public Health-Seattle & King County, Seattle, Washington
| | - Peter J Kudenchuk
- Emergency Medical Services Division, Public Health-Seattle & King County, Seattle, Washington
- Division of Cardiology, University of Washington, Seattle
| | - Michael R Sayre
- Seattle Fire Department, Seattle, Washington
- Department of Emergency Medicine, University of Washington, Seattle
| | - Thomas D Rea
- Emergency Medical Services Division, Public Health-Seattle & King County, Seattle, Washington
- Department of Medicine, University of Washington, Seattle
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Williams N. Prehospital Cardiac Arrest Should be Considered When Evaluating Coronavirus Disease 2019 Mortality in the United States. Methods Inf Med 2023; 62:100-109. [PMID: 36652957 PMCID: PMC10462431 DOI: 10.1055/a-2015-1244] [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: 03/31/2022] [Accepted: 01/04/2023] [Indexed: 01/20/2023]
Abstract
BACKGROUND Public health emergencies leave little time to develop novel surveillance efforts. Understanding which preexisting clinical datasets are fit for surveillance use is of high value. Coronavirus disease 2019 (COVID-19) offers a natural applied informatics experiment to understand the fitness of clinical datasets for use in disease surveillance. OBJECTIVES This study evaluates the agreement between legacy surveillance time series data and discovers their relative fitness for use in understanding the severity of the COVID-19 emergency. Here fitness for use means the statistical agreement between events across series. METHODS Thirteen weekly clinical event series from before and during the COVID-19 era for the United States were collected and integrated into a (multi) time series event data model. The Centers for Disease Control and Prevention (CDC) COVID-19 attributable mortality, CDC's excess mortality model, national Emergency Medical Services (EMS) calls, and Medicare encounter level claims were the data sources considered in this study. Cases were indexed by week from January 2015 through June of 2021 and fit to Distributed Random Forest models. Models returned the variable importance when predicting the series of interest from the remaining time series. RESULTS Model r2 statistics ranged from 0.78 to 0.99 for the share of the volumes predicted correctly. Prehospital data were of high value, and cardiac arrest (CA) prior to EMS arrival was on average the best predictor (tied with study week). COVID-19 Medicare claims volumes can predict COVID-19 death certificates (agreement), while viral respiratory Medicare claim volumes cannot predict Medicare COVID-19 claims (disagreement). CONCLUSION Prehospital EMS data should be considered when evaluating the severity of COVID-19 because prehospital CA known to EMS was the strongest predictor on average across indices.
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Affiliation(s)
- Nick Williams
- National Library of Medicine, Lister Hill National Center for Biomedical Communications, Bethesda, Maryland, United States
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Stone RM, Kaufman BT, Burns TA, Delbridge TR. COVID-19 Testing Among Out-of-Hospital Cardiac Arrest Patients: Implications for Public Health. PREHOSP EMERG CARE 2023; 28:448-452. [PMID: 37494661 DOI: 10.1080/10903127.2023.2241893] [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: 03/15/2023] [Revised: 05/17/2023] [Accepted: 07/20/2023] [Indexed: 07/28/2023]
Abstract
OBJECTIVE The objective of this study was to compare COVID-19 test positivity among out-of-hospital cardiac arrest patients whose resuscitative efforts were terminated in the field with the surrounding community. METHODS This was a retrospective cohort study of out-of-hospital cardiac arrest patients for whom unsuccessful resuscitative efforts were terminated in the field. Emergency medical services (EMS) personnel obtained postmortem COVID-19 nasal swab specimens from these patients between July 1, 2020 and February 28, 2022 to facilitate patient contact tracing and awareness of potential occupational exposure. A chi-square (n-1) was used to compare test result proportions between cardiac arrest patients and the community at large. A Pearson correlation was used to correlate test positivity among the two groups. RESULTS EMS personnel obtained postmortem specimens from 648 cardiac arrest patients; 20 (3.1%) were inconclusive. Of the 628 specimens successfully tested, 69 (11.0%) were positive, and 559 (89.0%) were negative. Monthly positivity ranged from 0.0% to 34.0%. For the community at large, overall test positivity during the same period was 5.1%, with a monthly range from 0.4% to 15.2%. Overall, expired and tested cardiac arrest patients had 5.9% (95%CI 3.68 - 8.59) greater COVID-19 test positivity than the general community. There was significant correlation in monthly positivity rates between the groups (r = 0.778, p < .001, 95%CI0.51 - 0.91). CONCLUSIONS Compared to the general population, COVID-19 was over-represented among EMS cardiac arrest patients who died in the field. Postmortem testing by EMS personnel, not typical practice, identified infectious disease cases that would have otherwise gone undetected, indicating potential for future surveillance applications.
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Affiliation(s)
- Roger M Stone
- Montgomery County (MD) Fire and Rescue Service, Gaithersburg, Maryland
- Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, Maryland
| | | | - Timothy A Burns
- Montgomery County (MD) Fire and Rescue Service, Gaithersburg, Maryland
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Chugh HS, Sargsyan A, Nakamura K, Uy-Evanado A, Dizon B, Norby FL, Young C, Hadduck K, Jui J, Shepherd D, Salvucci A, Chugh SS, Reinier K. Sudden cardiac arrest during the COVID-19 pandemic: A two-year prospective evaluation in a North American community. Heart Rhythm 2023; 20:947-955. [PMID: 36965652 PMCID: PMC10035806 DOI: 10.1016/j.hrthm.2023.03.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 03/03/2023] [Accepted: 03/19/2023] [Indexed: 03/27/2023]
Abstract
BACKGROUND Early during the coronavirus disease 2019 (COVID-19) pandemic, higher sudden cardiac arrest (SCA) incidence and lower survival rates were reported. However, ongoing effects on SCA during the evolving pandemic have not been evaluated. OBJECTIVE The purpose of this study was to assess the impact of COVID-19 on SCA during 2 years of the pandemic. METHODS In a prospective study of Ventura County, California (2020 population 843,843; 44.1% Hispanic), we compared SCA incidence and outcomes during the first 2 years of the COVID-19 pandemic to the prior 4 years. RESULTS Of 2222 out-of-hospital SCA cases identified, 907 occurred during the pandemic (March 2020 to February 2022) and 1315 occurred prepandemic (March 2016 to February 2020). Overall age-standardized annual SCA incidence increased from 39 per 100,000 (95% confidence [CI] 37-41) prepandemic to 54 per 100,000 (95% CI 50-57; P <.001) during the pandemic. Among Hispanics, incidence increased by 77%, from 38 per 100,000 (95% CI 34-43) to 68 per 100,000 (95% CI 60-76; P <.001). Among non-Hispanics, incidence increased by 26%, from 39 per 100,000 (95% CI 37-42; P <.001) to 50 per 100,000 (95% CI 46-54). SCA incidence rates closely tracked COVID-19 infection rates. During the pandemic, SCA survival was significantly reduced (15% to 10%; P <.001), and Hispanics were less likely than non-Hispanics to receive bystander cardiopulmonary resuscitation (45% vs 55%; P = .005) and to present with shockable rhythm (15% vs 24%; P = .003). CONCLUSION Overall SCA rates remained consistently higher and survival outcomes consistently lower, with exaggerated effects during COVID infection peaks. This longer evaluation uncovered higher increases in SCA incidence among Hispanics, with worse resuscitation profiles. Potential ethnicity-specific barriers to acute SCA care warrant urgent evaluation and intervention.
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Affiliation(s)
- Harpriya S Chugh
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California
| | - Arayik Sargsyan
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California
| | - Kotoka Nakamura
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California
| | - Audrey Uy-Evanado
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California
| | - Bernadine Dizon
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California
| | - Faye L Norby
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California
| | | | - Katy Hadduck
- Ventura County Health Care Agency, Ventura, California
| | - Jonathan Jui
- Department of Emergency Medicine, Oregon Health and Science University, Portland, Oregon
| | | | | | - Sumeet S Chugh
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California.
| | - Kyndaron Reinier
- Center for Cardiac Arrest Prevention, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California.
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Breyre A, Crowe RP, Fernandez AR, Jabr A, Myers JB, Kupas DF. Emergency medical services clinicians in the United States are increasingly exposed to death. J Am Coll Emerg Physicians Open 2023; 4:e12904. [PMID: 36817079 PMCID: PMC9930738 DOI: 10.1002/emp2.12904] [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] [Received: 11/29/2022] [Revised: 01/12/2023] [Accepted: 01/26/2023] [Indexed: 02/17/2023] Open
Abstract
Introduction Exposure to patient death places healthcare workers at increased risk for burnout and traumatic stress, yet limited data exist exploring exposure to death among emergency medical services (EMS) clinicians. Our objective was to describe changes in EMS encounters involving on-scene death from 2018 to 2021. Methods We retrospectively analyzed deidentified EMS records for 9-1-1 responses from the ESO Data Collaborative from 2018 to 2021. We identified cases where patient dispositions of death on scene, with or without attempted resuscitation, and without EMS transport. A non-parametric test of trend was used to assess for monotonic increase in agency-level encounters involving on-scene death and the proportion of EMS clinicians exposed to ≥1 on-scene death. Results We analyzed records from 1109 EMS agencies. These agencies responded to 4,286,976 calls in 2018, 5,097,920 calls in 2019, 4,939,651 calls in 2020, and 5,347,340 calls in 2021.The total number of encounters with death on scene rose from 49,802 in 2018 to 60,542 in 2019 to 76,535 in 2020 and 80,388 in 2021. Agency-level annual counts of encounters involving death on scene rose from a median of 14 (interquartile range [IQR], 4-40) in 2018 to 2023 (IQR, 6-63) in 2021 (P-trend < 0.001). In 2018, 56% of EMS clinicians responded to a call with death on scene, and this number rose to 63% of EMS clinicians in 2021 (P-trend < 0.001). Conclusion From 2018 to 2021, EMS clinicians were increasingly exposed to death. This trend may be driven by COVID-19 and its effects on the healthcare system and reinforces the need for evidence-based death notification training to support EMS clinicians.
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Affiliation(s)
- Amelia Breyre
- Department of Emergency MedicineYale UniversityNew HavenConnecticutUSA
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Patterson PD, Martin SE, Brassil BN, Hsiao WH, Weaver MD, Okerman TS, Seitz SN, Patterson CG, Robinson K. The Emergency Medical Services Sleep Health Study: A cluster-randomized trial. Sleep Health 2023; 9:64-76. [PMID: 36372657 DOI: 10.1016/j.sleh.2022.09.013] [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: 10/21/2021] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND Greater than half of emergency medical services (EMS) clinician shift workers report poor sleep, fatigue, and inadequate recovery between shifts. We hypothesized that EMS clinicians randomized to receive tailored sleep health education would have improved sleep quality and less fatigue compared to wait-list controls after 3 months. METHODS We used a cluster-randomized, 2-arm, wait-list control study design (clinicaltrials.gov identifier: NCT04218279). Recruitment of EMS agencies (clusters) was nationwide. Our study was powered at 88% to detect a 0.4 standard deviation difference in sleep quality with 20 agencies per arm and a minimum of 10 individuals per agency. The primary outcome was measured using the Pittsburgh Sleep Quality Index (PSQI) at 3-month follow-up. Our intervention was accessible in an online, asynchronous format and comprised of 10 brief education modules that address fatigue mitigation topics prescribed by the American College of Occupational Environmental Medicine. RESULTS In total, 36 EMS agencies and 678 individuals enrolled. Attrition at 3 months did not differ by study group (Intervention = 17.4% vs. Wait-list control = 18.2%; p = .37). Intention-to-treat analyses detected no differences in PSQI and fatigue scores at 3 months. Per protocol analyses showed the greater the number of education modules viewed, the greater the improvement in sleep quality and the greater the reduction in fatigue (p < .05). CONCLUSIONS While intention-to-treat analyses revealed no differences in sleep quality or fatigue at 3 months, per protocol findings identified select groups of EMS clinician shift workers who may benefit from sleep health education. Our findings may inform fatigue risk management programs.
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Affiliation(s)
- P Daniel Patterson
- University of Pittsburgh, School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA; University of Pittsburgh, School of Health and Rehabilitation Sciences, Division of Community Health Services, Emergency Medicine Program, Pittsburgh, Pennsylvania, USA.
| | - Sarah E Martin
- University of Pittsburgh, School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Bridget N Brassil
- University of Pittsburgh, School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Wei-Hsin Hsiao
- University of Pittsburgh, School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Matthew D Weaver
- Brigham and Women's Hospital, Division of Sleep and Circadian Disorders, Boston, Massachusetts, USA; Harvard Medical School, Division of Sleep Medicine, Boston, Massachusetts, USA
| | - Tiffany S Okerman
- University of Pittsburgh, School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Staci N Seitz
- University of Pittsburgh, School of Medicine, Department of Emergency Medicine, Pittsburgh, Pennsylvania, USA
| | - Charity G Patterson
- University of Pittsburgh, School of Health and Rehabilitation Sciences, Department of Physical Therapy, Pittsburgh, Pennsylvania, USA
| | - Kathy Robinson
- National Association of State EMS Officials (NASEMSO), Falls Church, Virginia, USA
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McAlister FA, Parikh H, Lee DS, Wijeysundera HC. Health Care Implications of the COVID-19 Pandemic for the Cardiovascular Practitioner. Can J Cardiol 2022:S0828-282X(22)01051-0. [PMID: 36481398 PMCID: PMC9721374 DOI: 10.1016/j.cjca.2022.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/24/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022] Open
Abstract
There has been substantial excess morbidity and mortality during the COVID-19 pandemic, not all of which was directly attributable to SARS-CoV-2 infection, and many non-COVID-19 deaths were cardiovascular. The indirect effects of the pandemic have been profound, resulting in a substantial increase in the burden of cardiovascular disease and cardiovascular risk factors, both in individuals who survived SARS-CoV-2 infection and in people never infected. In this report, we review the direct effect of SARS-CoV-2 infection on cardiovascular and cardiometabolic disease burden in COVID-19 survivors as well as the indirect effects of the COVID-19 pandemic on the cardiovascular health of people who were never infected with SARS-CoV-2. We also examine the pandemic effects on health care systems and particularly the care deficits caused (or exacerbated) by health care delayed or foregone during the COVID-19 pandemic. We review the consequences of: (1) deferred/delayed acute care for urgent conditions; (2) the shift to virtual provision of outpatient care; (3) shortages of drugs and devices, and reduced access to: (4) diagnostic testing, (5) cardiac rehabilitation, and (6) homecare services. We discuss the broader implications of the COVID-19 pandemic for cardiovascular health and cardiovascular practitioners as we move forward into the next phase of the pandemic.
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Affiliation(s)
- Finlay A. McAlister
- The Division of General Internal Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada,The Alberta Strategy for Patient Oriented Research Support Unit, Edmonton, Alberta, Canada,Corresponding author: Dr Finlay A. McAlister, 5-134C Clinical Sciences Building, University of Alberta, 11350 83 Avenue, Edmonton, Alberta T6G 2G3, Canada. Tel.: +1-780-492-9824; fax: +1-780-492-7277
| | - Harsh Parikh
- Peter Munk Cardiac Center, Ted Rogers Centre for Heart Research, University of Toronto, Toronto, Ontario, Canada
| | - Douglas S. Lee
- Peter Munk Cardiac Center, Ted Rogers Centre for Heart Research, University of Toronto, Toronto, Ontario, Canada,ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Ontario, Canada
| | - Harindra C. Wijeysundera
- ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Ontario, Canada,Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada,Schulich Heart Program, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario, Canada
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Chugh HS, Sargsyan A, Nakamura K, Uy-Evanado A, Dizon B, Norby FL, Young C, Hadduck K, Jui J, Shepherd D, Salvucci A, Chugh SS, Reinier K. Ethnicity-Specific Effects on Cardiac Arrest During the COVID-19 Pandemic: A Two-Year Prospective Evaluation in a North American Community. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2022:2022.10.15.22281071. [PMID: 36299424 PMCID: PMC9603830 DOI: 10.1101/2022.10.15.22281071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
Abstract
Background Out-of-hospital sudden cardiac arrest (SCA) is a major public health problem with mortality >90%, and incidence has increased during the COVID-19 pandemic. Information regarding ethnicity-specific effects on SCA incidence and survival is lacking. Methods In a prospective, population-based study of Ventura County, CA residents (2020 Pop. 843,843; 44.1% Hispanic), we compared SCA incidence and outcomes during the first two years of the COVID-19 pandemic to the prior four years, overall and by ethnicity (Hispanic vs non-Hispanic). Findings Of 2,222 OHCA cases identified, 907 occurred during the pandemic (March 2020 - Feb 2022) and 1315 occurred pre-pandemic (March 2016 - Feb 2020). Overall age-standardized annual SCA incidence increased from 38.9/100,000 [95% CI 36.8-41.0] pre-pandemic to 53.8/100,00 [95% CI 50.3 - 57.3, p<0.001] during the pandemic. Among Hispanics, incidence increased by 77%, from 38.2/100,00 [95% CI 33.8-42.5] to 67.7/100,00 [95% CI 59.5- 75.8, p<0.001]. Among non-Hispanics, incidence increased by 26% from 39.4/100,000 [95% CI 36.9-41.9, p<0.001] to 49.8/100,00 [95% CI 45.8-53.8]. SCA incidence rates closely tracked COVID-19 infection rates. During the pandemic, SCA survival was significantly reduced (15.3% to 10.0%, p<0.001) and Hispanics were less likely than non-Hispanics to have bystander CPR (44.6% vs. 54.7%, p=0.005) and shockable rhythm (15.3% vs. 24.1%, p=0.003). Interpretation Hispanic residents experienced higher SCA rates during the pandemic with less favorable resuscitation profiles. These findings implicate potential ethnicity-specific barriers to acute care and represent an urgent call to action at the community and health-system levels. Funding National Heart Lung and Blood Institute Grants R01HL145675 and R01HL147358.
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Ratajczak J, Szczerbiński S, Kubica A. Occurrence and Temporal Variability of Out-of-Hospital Cardiac Arrest during COVID-19 Pandemic in Comparison to the Pre-Pandemic Period in Poland-Observational Analysis of OSCAR-POL Registry. J Clin Med 2022; 11:jcm11144143. [PMID: 35887907 PMCID: PMC9316491 DOI: 10.3390/jcm11144143] [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] [Received: 06/25/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 02/04/2023] Open
Abstract
An investigation of the chronobiology of out-of-hospital cardiac arrest (OHCA) during the coronavirus disease 2019 (COVID-19) pandemic and the differences in comparison to the 6-year pre-pandemic period. A retrospective analysis of the dispatch cards from the Emergency Medical Service between January 2014 and December 2020 was performed within the OSCAR-POL registry. The circadian, weekly, monthly, and seasonal variabilities of OHCA were investigated. A comparison of OHCA occurrence between the year 2020 and the 6-year pre-pandemic period was made. A total of 416 OHCAs were reported in 2020 and the median of OHCAs during the pre-pandemic period was 379 (interquartile range 337−407) cases per year. Nighttime was associated with a decreased number of OHCAs (16.6%) in comparison to afternoon (31.5%, p < 0.001) and morning (30.0%, p < 0.001). A higher occurrence at night was observed in 2020 compared to 2014−2019 (16.6% vs. 11.7%, p = 0.001). Monthly and seasonal variabilities were observed in 2020. The months with the highest OHCA occurrence in 2020 were November (13.2%) and October (11.1%) and were significantly higher compared to the same months during the pre-pandemic period (9.1%, p = 0.002 and 7.9%, p = 0.009, respectively). Autumn was the season with the highest rate of OHCA, which was also higher compared to the pre-pandemic period (30.5% vs. 25.1%, p = 0.003). The COVID-19 pandemic was related to a higher occurrence of OHCA. The circadian, monthly, and seasonal variabilities of OHCA occurrence were confirmed. In 2020, the highest occurrence of OHCA was observed in October and November, which coincided with the highest occurrence of COVID-19 infections in Poland.
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Affiliation(s)
- Jakub Ratajczak
- Department of Health Promotion, Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz, 85-094 Bydgoszcz, Poland;
- Department of Cardiology and Internal Medicine, Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz, 85-094 Bydgoszcz, Poland
- Correspondence: ; Tel.: +48-52-585-40-23; Fax: +48-52-585-40-24
| | | | - Aldona Kubica
- Department of Health Promotion, Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz, 85-094 Bydgoszcz, Poland;
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11
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Baldi E, Cortegiani A, Savastano S. Cardiac arrest and coronavirus disease 2019. Curr Opin Crit Care 2022; 28:237-243. [PMID: 35275877 PMCID: PMC9208745 DOI: 10.1097/mcc.0000000000000931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE OF REVIEW The impact of the coronavirus disease 2019 (COVID-19) on the cardiovascular system has been highlighted since the very first weeks after the severe acute respiratory syndrome coronavirus 2 identification. We reviewed the influence of COVID-19 pandemic on cardiac arrest, both considering those occurred out of the hospital (OHCA) and in the hospital (IHCA). RECENT FINDINGS An increase in OHCA incidence occurred in different countries, especially in those regions most burdened by the COVID-19, as this seems to be bounded to the pandemic trend. A change of OHCA patients' characteristics, with an increase of the OHCA occurred at home, a decrease in bystander cardiopulmonary resuscitation and automated external defibrillator use before Emergency Medical Service (EMS) arrival and an increase in non-shockable rhythms, have been highlighted. A dramatic drop in the OHCA patients' survival was pointed out in almost all the countries, regardless of the high or low-incidence of COVID-19 cases. Concerning IHCA, a reduction in survival was highlighted in patients with COVID-19 who sustained a cardiac arrest. SUMMARY Cardiac arrest occurrence and survival were deeply affected by the pandemic. Informative campaigns to the population to call EMS in case of need and the re-allocation of the prehospital resources basing on the pandemic trend are needed to improve survival.
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Affiliation(s)
- Enrico Baldi
- Department of Molecular Medicine, Section of Cardiology, University of Pavia
- Cardiac Intensive Care Unit, Arrhythmia and Electrophysiology and Experimental Cardiology, Fondazione IRCCS Policlinico San Matteo, Pavia
- Division of Cardiology, Fondazione IRCCS Policlinico San Matteo, Pavia
| | - Andrea Cortegiani
- Department of Surgical, Oncological and Oral Science (Di.Chir.On.S.), University of Palermo
- Department of Anesthesia Intensive Care and Emergency, Policlinico Paolo Giaccone, Palermo, Italy
| | - Simone Savastano
- Division of Cardiology, Fondazione IRCCS Policlinico San Matteo, Pavia
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12
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Hawkes CA, Kander I, Contreras A, Ji C, Brown TP, Booth S, Niroshan Siriwardena A, Fothergill RT, Williams J, Rees N, Stephenson E, Perkins GD. Impact of the COVID-19 pandemic on public attitudes to cardiopulmonary resuscitation and publicly accessible defibrillator use in the UK. Resusc Plus 2022; 10:100256. [PMID: 35665312 PMCID: PMC9149208 DOI: 10.1016/j.resplu.2022.100256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 05/09/2022] [Accepted: 05/22/2022] [Indexed: 11/15/2022] Open
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13
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Fontanelli L, Sandroni C, Skrifvars MB. Out-of-hospital and in-hospital cardiac arrest during the COVID-19 pandemic: changes in demographics, outcomes and management. Minerva Anestesiol 2022; 88:594-603. [PMID: 35381836 DOI: 10.23736/s0375-9393.22.15994-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
During the COVID-19 pandemic, prehospital and hospital services were put under great stress because of limited resources and increased workloads. One expected effect was the increased number of out-of-hospital (OHCA) and in-hospital (IHCA) cardiac arrests that occurred during 2020 compared to previous years. Both direct and indirect mechanisms were involved. In the former case, although the exact mechanisms by which Sars-Cov-2 causes cardiac arrest (CA) are still unknown, severe hypoxia, a dysregulated immune host response and sepsis are probably implicated and are often seen in COVID-19 patients with poor outcomes. In the latter case, the strain on hospitals, changes in treatment protocols, governments' actions to limit the spread of the disease and fear of the contagion naturally affected treatment efficacy and disrupted the CA chain of survival; as expected in OHCA, only a small proportion of patients were positive to COVID-19, and yet reported outcomes were worse during the pandemic. CA patient characteristics were reported, along with modifications in patient management. In this review, we summarise the evidence to date regarding OHCA and IHCA epidemiology and management during the COVID-19 pandemic.
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Affiliation(s)
- Luca Fontanelli
- Unit of Anaesthesia and Intensive Care, Department of Clinical-Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy -
| | - Claudio Sandroni
- Department of Intensive Care, Emergency Medicine and Anesthesiology, Fondazione Policlinico Universitario Agostino Gemelli- IRCCS, Rome, Italy.,Institute of Anesthesiology and Intensive Care Medicine, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Markus B Skrifvars
- Department of Emergency Medicine and Services, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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14
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Rossouw TM, Anderson R, Manga P, Feldman C. Emerging Role of Platelet-Endothelium Interactions in the Pathogenesis of Severe SARS-CoV-2 Infection-Associated Myocardial Injury. Front Immunol 2022; 13:776861. [PMID: 35185878 PMCID: PMC8854752 DOI: 10.3389/fimmu.2022.776861] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/19/2022] [Indexed: 12/21/2022] Open
Abstract
Cardiovascular dysfunction and disease are common and frequently fatal complications of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Indeed, from early on during the SARS-CoV-2 virus pandemic it was recognized that cardiac complications may occur, even in patients with no underlying cardiac disorders, as part of the acute infection, and that these were associated with more severe disease and increased morbidity and mortality. The most common cardiac complication is acute cardiac injury, defined by significant elevation of cardiac troponins. The potential mechanisms of cardiovascular complications include direct viral myocardial injury, systemic inflammation induced by the virus, sepsis, arrhythmia, myocardial oxygen supply-demand mismatch, electrolyte abnormalities, and hypercoagulability. This review is focused on the prevalence, risk factors and clinical course of COVID-19-related myocardial injury, as well as on current data with regard to disease pathogenesis, specifically the interaction of platelets with the vascular endothelium. The latter section includes consideration of the role of SARS-CoV-2 proteins in triggering development of a generalized endotheliitis that, in turn, drives intense activation of platelets. Most prominently, SARS-CoV-2–induced endotheliitis involves interaction of the viral spike protein with endothelial angiotensin-converting enzyme 2 (ACE2) together with alternative mechanisms that involve the nucleocapsid and viroporin. In addition, the mechanisms by which activated platelets intensify endothelial activation and dysfunction, seemingly driven by release of the platelet-derived calcium-binding proteins, SA100A8 and SA100A9, are described. These events create a SARS-CoV-2–driven cycle of intravascular inflammation and coagulation, which contributes significantly to a poor clinical outcome in patients with severe disease.
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Affiliation(s)
- Theresa M. Rossouw
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
- *Correspondence: Theresa M. Rossouw,
| | - Ronald Anderson
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Pravin Manga
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Charles Feldman
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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15
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Sheikh S, Van Cleve W, Kumar V, Peerwani G, Aijaz S, Pathan A. Cases of acute coronary syndrome and presumed cardiac death prior to arrival at an urban tertiary care hospital in Pakistan during the COVID-19 pandemic. PLoS One 2022; 17:e0263607. [PMID: 35113963 PMCID: PMC8812872 DOI: 10.1371/journal.pone.0263607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 01/23/2022] [Indexed: 11/19/2022] Open
Abstract
Background
A reduction in overall acute coronary syndrome (ACS) cases, increases in the severity of ACS presentation, and increased rates of out-of-hospital cardiac arrest (OHCA) have been reported from multiple countries during the COVID-19 pandemic. The attributed factors include COVID-19 infection, fear of COVID-19 and resultant avoidance of health care facilities, and restrictions on mobility. Pakistan, a country with a high burden of cardiovascular disease (CVD) and challenges related to health care access, will be expected to demonstrate these same findings. Therefore, we compared ACS hospitalization, ACS severity, and patients who have already died (dead on arrival, or DOA) due to presumed OHCA at a tertiary cardiac hospital during pre-pandemic and intra-pandemic periods in Pakistan.
Methods
Standardized data elements were extracted from the charts of patients with ACS, and telephonic verbal autopsies (VA) using a validated tool were conducted for patients who were arrived DOA. As a comparison, cases during the same months prior to the COVID-19 were analyzed for respective waves. Events were counted, and proportions and frequencies are reported for each time period.
Results
A total of 4,480 ACS cases were reviewed; 1,216 cases during March-July 2019, 804 cases in the same months of 2020 (33.8% decrease); 1,304 cases in August 2019-January 2020 and 1,157 in the corresponding months of 2020 and 2021 (11.2% decrease). There was no observed change in the baseline characteristics of patients with ACS or their symptom-to-door time, and in-hospital mortality was unchanged across all time periods. There were 218 DOA cases in pre-pandemic months and 360 cases during the pandemic. The pre-pandemic rate of DOA was 12/1000 emergency patients (95% CI 10–13) compared to 22/1000 (95% CI 22–27) during the pandemic (30/1000in the 1st wave and 17/1000 during 2nd wave). On VA, CVD was found to be the major cause of death during both time periods.
Conclusion
At a cardiac hospital in Pakistan, the COVID-19 pandemic was associated with a reduction in ACS hospitalization and an increased DOA rate.
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Affiliation(s)
- Sana Sheikh
- Department of Clinical Research Cardiology, Tabba Heart Institute, Karachi, Pakistan
- * E-mail:
| | - Wil Van Cleve
- Department of Anesthesiology and Pain Medicine, Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, United States of America
| | - Vinod Kumar
- Department of Emergency, Tabba Heart Institute, Karachi, Pakistan
| | - Ghazal Peerwani
- Department of Clinical Research Cardiology, Tabba Heart Institute, Karachi, Pakistan
| | - Saba Aijaz
- Department of Clinical Research Cardiology, Tabba Heart Institute, Karachi, Pakistan
| | - Asad Pathan
- Department of Clinical Research Cardiology, Tabba Heart Institute, Karachi, Pakistan
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16
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Dunlap DR, Santos RS, Lilly CM, Teebagy S, Hafer NS, Buchholz BO, McManus DD. COVID-19: a gray swan's impact on the adoption of novel medical technologies. HUMANITIES & SOCIAL SCIENCES COMMUNICATIONS 2022; 9:232. [PMID: 35821762 PMCID: PMC9263801 DOI: 10.1057/s41599-022-01247-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 06/23/2022] [Indexed: 05/16/2023]
Abstract
The COVID-19 pandemic offers a unique context and opportunity to investigate changes in healthcare professional perceptions towards the adoption of novel medical technologies, such as point-of-care technologies (POCTs). POCTs are a nascent technology that has experienced rapid growth as a result of COVID-19 due to their ability to increase healthcare accessibility via near-patient delivery, including at-home. We surveyed healthcare professionals before and during COVID-19 to explore whether the pandemic altered their perceptions about the usefulness of POCTs. Our network analysis method provided a structure for understanding this changing phenomenon. We uncovered that POCTs are not only useful for diagnosing COVID-19, but healthcare professionals also perceive them as increasingly important for diagnosing other diseases, such as cardiovascular, endocrine, respiratory, and metabolic diseases. Healthcare professionals also viewed POCTs as facilitating the humanization of epidemiology by improving disease management/monitoring and strengthening the clinician-patient relationship. As the accuracy and integration of these technologies into mainstream healthcare delivery improves, hurdles to their adoption dissipate, thereby encouraging healthcare professionals to rely upon them more frequently to diagnose, manage, and monitor diseases. The technological advances made in POCTs during COVID-19, combined with shifting positive perceptions of their utility by healthcare professionals, may better prepare us for the next pandemic.
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Affiliation(s)
| | | | - Craig M. Lilly
- University of Massachusetts Chan Medical School, Worcester, MA USA
| | - Sean Teebagy
- University of Massachusetts Chan Medical School, Worcester, MA USA
| | | | | | - David D. McManus
- University of Massachusetts Chan Medical School, Worcester, MA USA
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17
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Affiliation(s)
- Thomas Rea
- Department of Medicine General Medicine University of Washington Seattle WA.,The Division of Emergency Medical Services, Public Health Seattle & King County Seattle WA
| | - Peter J Kudenchuk
- The Division of Emergency Medical Services, Public Health Seattle & King County Seattle WA.,Department of Medicine Cardiology University of Washington Seattle WA
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18
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A Systematic Review and Meta-Analysis of the Implementation of High-Performance Cardiopulmonary Resuscitation on Out-of-Hospital Cardiac Arrest Outcomes. J Clin Med 2021; 10:jcm10102098. [PMID: 34068157 PMCID: PMC8152988 DOI: 10.3390/jcm10102098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
Despite numerous technological and medical advances, out-of-hospital cardiac arrests (OHCAs) still suffer from suboptimal survival rates and poor subsequent neurological and functional outcomes amongst survivors. Multiple studies have investigated the implementation of high-quality prehospital resuscitative efforts, and across these studies, different terms describing high-quality resuscitative efforts have been used, such as high-performance CPR (HP CPR), multi-tiered response (MTR) and minimally interrupted cardiac resuscitation (MICR). There is no universal definition for HP CPR, and dissimilar designs have been employed. This systematic review thus aimed to review current evidence on HP CPR implementation and examine the factors that may influence OHCA outcomes. Eight studies were systematically reviewed, and seven were included in the final meta-analysis. Random-effects meta-analysis found a significantly improved likelihood of prehospital return of spontaneous circulation (pooled odds ratio (OR) = 1.46, 95% CI: 1.16 to 1.82, p < 0.001), survival-to-discharge (pooled OR = 1.32, 95% CI: 1.16 to 1.50, p < 0.001) and favourable neurological outcomes (pooled OR = 1.24, 95% CI: 1.11 to 1.39, p < 0.001) with HP CPR or similar interventions. However, the studies had generally high heterogeneity (I2 greater than 50%) and overall moderate-to-severe risk for bias. Moving forward, a randomised, controlled trial is necessary to shed light on the subject.
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