Short-term departures from an optimum ambient temperature are associated with increased risk of out-of-hospital cardiac arrest

Dahlquist, Marcus; Raza, Auriba; Bedada, Getahun Bero; Hollenberg, Jacob; Lind, Tomas; Orsini, Nicola; Sjögren, Bengt; Svensson, Leif; Ljungman, Petter

doi:10.1016/j.ijheh.2016.03.005

Cited by 20 publications

(22 citation statements)

References 39 publications

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“…The week prior to delivery and the days comprising the week prior to delivery were chosen as the hazard periods given evidence suggesting acute cardiovascular effects within seven days in the non-pregnant population (Dahlquist et al, 2016; Wang et al, 2016; Wichmann et al, 2013; Zheng et al, 2016). Temperature during this hazard period was then compared to two control periods: the second week after delivery and the week two full gestational weeks before delivery.…”

Section: Methodsmentioning

confidence: 99%

Ambient temperature and risk of cardiovascular events at labor and delivery: A case-crossover study

Nguyen

Liu

et al. 2017

Environmental Research

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Background Extreme ambient temperatures are linked to cardiac events in the general population, but this relationship is unclear among pregnant women. We estimated the associations and attributable risk between ambient temperature and the risk of cardiovascular event at labor/delivery, and investigated whether these associations vary by maternal race/ethnicity. Methods We identified 680 women with singleton deliveries affected by cardiovascular events across 12 US sites (2002–2008). Average daily temperature during the week before, delivery day, and each of the seven days before delivery was estimated for each woman. In a case-crossover analysis, exposures during these hazard periods were compared to two control periods before and after delivery using conditional logistic regression adjusted for other environmental factors. Results During the cold season (October-April), 1°C lower during the week prior to delivery was associated with a 4% (95% CI: 1–7%) increased risk of having a labor/delivery affected by cardiovascular events including cardiac arrest and stroke. During the warm season (May–September), 1°C higher during the week prior was associated with a 7% (95% CI: 3–12%) increased risk. These risks translated to 13.4 and 23.9 excess events per 100 000 singleton deliveries during the cold and warm season, respectively. During the warm season, the risks were more pronounced on days closer to delivery and Black women appeared to be more susceptible to the same temperature increase. Conclusion Small changes in temperature appear to affect the risk of having cardiovascular events at labor/delivery. Black women had a differentially higher warm season risk. These findings merit further investigation.

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Section: Methodsmentioning

confidence: 99%

Ambient temperature and risk of cardiovascular events at labor and delivery: A case-crossover study

Nguyen

Liu

et al. 2017

Environmental Research

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“…Studies investigating the impact of ambient environmental conditions on OHCA associated with demographics and comorbidity had inconsistent findings[ 7 , 11 , 15 , 23 ]. A Stockholm study reported that age and sex had no role in the relationship between OHCA and ambient temperature[ 7 ]. The elderly and male population seem to have a higher risk of OHCA in association with ambient temperature in South Korea[ 11 ]; comorbidities have a minor role to modify the relationship.…”

Section: Discussionmentioning

confidence: 99%

“…Studies have correlated the incident OHCA to the ambient temperature[ 7 – 11 ]. The OHCA incidence is higher in cold season than when it is hot.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have also linked the risk of OHCA to ambient concentrations of air pollutants[ 10 , 12 – 24 ] independent from ambient temperature[ 7 , 11 ]. Particulate matter less than 10 or 2.5μm in aerodynamic diameter (PM 10 or PM 2.5 )[ 10 , 16 , 20 , 22 – 25 ], and ozone (O 3 )[ 12 , 13 , 21 , 22 , 24 ] have been identified as air pollutants associated with OHCA.…”

Section: Introductionmentioning

confidence: 99%

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Pre-existing comorbidity modify emergency room visit for out-of-hospital cardiac arrest in association with ambient environments

Wang¹,

Chen

Ko³

et al. 2018

PLoS ONE

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BackgroundThis study evaluated risks of emergency room visit (ERV) for out-of-hospital cardiac arrest (OHCA) in 2005–2011, among patients with cardiologic and metabolic syndromes (CMS), in association with ambient environments.MethodsPooled and area-specific weather related cumulative six-day (lags 0 to 5) relative risks (RRs) and confidence intervals (CIs) of ERV for OHCA were evaluated for CMS cases, using distributed lag nonlinear models and multivariate meta-analytical second-stage model in association with the daily average temperatures and daily concentrations of air pollutants.ResultsERV risk increased as average temperature dropped to <27°C. At the mean temperature of 14°C, the cumulative six-day RRs of ERV were 1.73 (95% CI: 1.22, 2.46) for all OHCA patients, 1.74 (95% CI: 1.06, 2.84) for OHCA patients younger than 65 years old, and 1.99 (95% CI: 1.03, 3.81) for subjects with pre-existing hypertension. High temperature was also associated with elevated ERV of OHCA. Increased ERV risks in cases with pre-existing hypertension and diabetes mellitus were also associated with concentrations of air pollutants in northern Taiwan.ConclusionsOur data provided evidences to clinicians, emerging medical services and public health that the ERV risk for OHCA patients is greater at low temperature than at high temperature. Patients with cardio and metabolic disorders need to pay greater attention to low temperature and avoid heat wave.

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“…Out-of-hospital Cardiac Arrest occurs when a person's heart suddenly stops pumping blood because of non-cardiac reasons at home, in public locations, ambulance, the emergency room, and at any location before hospital admission [5]. Acute coronary syndrome is an important risk factor for Out-of-hospital Cardiac Arrest [6][7][8]. The global prevalence of Out-of-hospital Cardiac Arrest is high and its mean survival rate is low (9.1%).…”

Section: Introductionmentioning

confidence: 99%

Relationship of Humidity and Atmospheric Pressure With the Risk of Out-of-hospital Cardiac Arrest

Borghei

Moghadamnia

Sigaroudi

et al. 2020

J Holist Nurs Midwifery

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Introduction: Climate change, which affects human health, is one of the most important public health concerns. Few studies have examined the effects of humidity and atmospheric pressure as risk factors on the cardiac system and Out-of-hospital Cardiac Arrest. Objective: This study aimed to determine the relationship between climatic variables (humidity and atmospheric pressure) with Out-of-hospital Cardiac Arrest , and its outcome over 3 years (2016-2018). Materials and Methods: This is an ecological time-series study. Participants were 392 patients with Out-of-hospital Cardiac Arrest referred to Hospital in Rasht City, Iran from 2016 to 2018. Meteorological data and information related to Out-of-hospital Cardiac Arrest and its consequences were collected from reliable resources and were analyzed in R software. Results: Low humidity increased the relative risk of Out-of-hospital Cardiac Arrest (OR=1.54, 95%CI: 1.001-2.69, P=0.001) and failed cardiopulmonary resuscitation (OR=1.76, 95% CI; 1.006-3.79, P=0.001). Higher atmospheric pressure was associated with increased risk of Out-of-hospital Cardiac Arrest (OR=1.16, 95%CI; 1.001-1.78, P=0.001) and unsuccessful cardiopulmonary resuscitation (OR=1.039, 95% CI; 1.005-1.91, P=0.001). Conclusion: Decreased humidity and increased atmospheric pressure are associated with an increased number of Out-of-hospital Cardiac Arrest cases and failure of cardiopulmonary resuscitation. Informing people with cardiovascular disease to avoid such weather conditions, as well as preparing the medical care team and designing early warning systems, can reduce the adverse effects of climate change on the heart.

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Short-term departures from an optimum ambient temperature are associated with increased risk of out-of-hospital cardiac arrest

Cited by 20 publications

References 39 publications

Ambient temperature and risk of cardiovascular events at labor and delivery: A case-crossover study

Ambient temperature and risk of cardiovascular events at labor and delivery: A case-crossover study

Pre-existing comorbidity modify emergency room visit for out-of-hospital cardiac arrest in association with ambient environments

Relationship of Humidity and Atmospheric Pressure With the Risk of Out-of-hospital Cardiac Arrest

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