Análisis de la relación entre la contaminación del aire ambiente y la gravedad de las descompensaciones por insuficiencia cardiaca en dos metrópolis españolas (Barcelona y Madrid) / Analysis of the relationship between ambient air pollution and the severity of heart failure decompensations in two Spanish metropolises (Barcelona and Madrid)

Se estudiaron pacientes con IC descompensada en urgencias de 4 hospitales de Barcelona y 3 de Madrid. Se recogieron datos clínicos (edad, sexo, comorbilidades, situación funcional basal), atmosféricos (temperatura, presión atmosférica) y de contaminantes (SO2, NO2, CO, O3, PM10, PM2,5) el día de atención en urgencias. La gravedad de la descompensación se estimó mediante la mortalidad a 7 días (indicador primario) y la necesidad de hospitalización, mortalidad intrahospitalaria y hospitalización prolongada (indicadores secundarios). Se investigó la asociación ajustada por datos clínicos, atmosféricos y ciudad entre concentración de contaminantes y gravedad, mediante regresión logística (asunción de linealidad) y curvas spline cúbicas restringidas (no asunción de linealidad). Resultados Se incluyeron 5.292 descompensaciones, con edad mediana de 83 años (RIC=76-88) y 56% mujeres. Las medianas (RIC) de los promedios diarios de contaminantes fueron: SO2=2,5μg/m3 (1,4-7,0), NO2=43μg/m3 (34-57), CO=0,48mg/m3 (0,35-0,63), O3=35μg/m3 (25-48), PM10=22μg/m3 (15-31) y PM2,5=12μg/m3 (8-17). La mortalidad a 7 días fue del 3,9%, y la hospitalización, la mortalidad intrahospitalaria y la hospitalización prolongada, del 78,9, 6,9 y 47,5%, respectivamente. El SO2 fue el único contaminante que mostró asociación lineal con la gravedad de la descompensación, ya que cada unidad de incremento supuso una OR para necesidad de hospitalización de 1,04 (IC 95% 1,01-1,08). El estudio mediante curvas spline cúbicas restringidas tampoco mostró asociaciones nítidas entre contaminantes y gravedad, excepto para SO2 y hospitalización, con OR de 1,55 (IC 95% 1,01-2,36) y de 2,71 (IC 95% 1,13-6,49) para concentraciones de 15 y 24μg/m3, respectivamente, en relación con una concentración de referencia de 5μg/m3 (AU)

Objectives To analyze whether the high levels of air pollutants are related to a greater severity of decompensated heart failure (HF). Method Patients diagnosed with decompensated HF in the emergency department of 4 hospitals in Barcelona and 3 in Madrid were included. Clinical data (age, sex, comorbidities, baseline functional status), atmospheric (temperature, atmospheric pressure) and pollutant data (SO2, NO2, CO, O3, PM10, PM2.5) were collected in the city on the day of emergency care. The severity of decompensation was estimated using 7-day mortality (primary indicator) and the need for hospitalization, in-hospital mortality, and prolonged hospitalization (secondary indicators). The association adjusted for clinical, atmospheric and city data between pollutant concentration and severity was investigated using linear regression (linearity assumption) and restricted cubic spline curves (no linearity assumption). Results A total of 5292 decompensations were included, with a median age of 83 years (IQR=76-88) and 56% women. The medians (IQR) of the daily pollutant averages were: SO2=2.5μg/m3 (1.4-7.0), NO2=43μg/m3 (34-57), CO=0.48mg/m3 (0.35-0.63), O3=35μg/m3 (25-48), PM10=22μg/m3 (15-31) and PM2.5=12μg/m3 (8-17). Mortality at 7 days was 3.9%, and hospitalization, in-hospital mortality, and prolonged hospitalization were 78.9, 6.9, and 47.5%, respectively. SO2 was the only pollutant that showed a linear association with the severity of decompensation, since each unit of increase implied an OR for the need for hospitalization of 1.04 (95% CI 1.01-1.08). The restricted cubic spline curves study also did not show clear associations between pollutants and severity, except for SO2 and hospitalization, with OR of 1.55 (95% CI 1.01-2.36) and 2.71 (95% CI 1.13-6.49) for concentrations of 15 and 24μg/m3, respectively, in relation to a reference concentration of 5μg/m3 (AU)

[Analysis of the relationship between ambient air pollution and the severity of heart failure decompensations in two Spanish metropolises (Barcelona and Madrid)]. / Análisis de la relación entre la contaminación del aire ambiente y la gravedad de las descompensaciones por insuficiencia cardiaca en dos metrópolis españolas (Barcelona y Madrid).

OBJECTIVES: To analyze whether the high levels of air pollutants are related to a greater severity of decompensated heart failure (HF). METHOD: Patients diagnosed with decompensated HF in the emergency department of 4 hospitals in Barcelona and 3 in Madrid were included. Clinical data (age, sex, comorbidities, baseline functional status), atmospheric (temperature, atmospheric pressure) and pollutant data (SO2, NO2, CO, O3, PM10, PM2.5) were collected in the city on the day of emergency care. The severity of decompensation was estimated using 7-day mortality (primary indicator) and the need for hospitalization, in-hospital mortality, and prolonged hospitalization (secondary indicators). The association adjusted for clinical, atmospheric and city data between pollutant concentration and severity was investigated using linear regression (linearity assumption) and restricted cubic spline curves (no linearity assumption). RESULTS: A total of 5292 decompensations were included, with a median age of 83 years (IQR=76-88) and 56% women. The medians (IQR) of the daily pollutant averages were: SO2=2.5µg/m3 (1.4-7.0), NO2=43µg/m3 (34-57), CO=0.48mg/m3 (0.35-0.63), O3=35µg/m3 (25-48), PM10=22µg/m3 (15-31) and PM2.5=12µg/m3 (8-17). Mortality at 7 days was 3.9%, and hospitalization, in-hospital mortality, and prolonged hospitalization were 78.9, 6.9, and 47.5%, respectively. SO2 was the only pollutant that showed a linear association with the severity of decompensation, since each unit of increase implied an OR for the need for hospitalization of 1.04 (95% CI 1.01-1.08). The restricted cubic spline curves study also did not show clear associations between pollutants and severity, except for SO2 and hospitalization, with OR of 1.55 (95% CI 1.01-2.36) and 2.71 (95% CI 1.13-6.49) for concentrations of 15 and 24µg/m3, respectively, in relation to a reference concentration of 5µg/m3. CONCLUSION: Exposure to ambient air pollutants, in a medium to low concentration range, is generally not related to the severity of HF decompensations, and only SO2 may be associated with an increased need for hospitalization.

Influence of Meteorological Temperature and Pressure on the Severity of Heart Failure Decompensations.

OBJECTIVE: To investigate the relationship between ambient temperature and atmospheric pressure (AP) and the severity of heart failure (HF) decompensations. METHODS: We analysed patients coming from the Epidemioloy Acute Heart Failure Emergency (EAHFE) Registry, a multicentre prospective cohort study enrolling patients diagnosed with decompensated HF in 26 emergency departments (EDs) of 16 Spanish cities. We recorded patient and demographic data and maximum temperature (Tmax) and AP (APmax) the day before ED consultation. Associations between temperature and AP and severity endpoints were explored by logistic regression. We used restricted cubic splines to model continuous non-linear associations of temperature and AP with each endpoint. RESULTS: We analysed 16,545 patients. Daily Tmax and APmax (anomaly) of the day before patient ED arrival ranged from 0.8 to 41.6° and from - 61.7 to 69.9 hPa, respectively. A total of 12,352 patients (75.2%) were hospitalised, with in-hospital mortality in 1171 (7.1%). The probability of hospitalisation by HF decompensation showed a U-shaped curve versus Tmax and an increasing trend versus APmax. Regarding temperature, hospitalisation significantly increased from 20 °C (reference) upwards (25 °C: OR = 1.12, 95% CI = 1.04-1.21; 40 °C: 1.65, 1.13-2.40) and below 5.4 °C (5 °C: 1.21, 1.01-1.46). Concerning the mean AP of the city (anomaly = 0 hPa), hospitalisation increased when APmax (anomaly) was above + 7.0 hPa (atmospheric anticyclone; + 10 hPa: 1.14, 1.05-1.24; + 30 hPa: 2.02. 1.35-3.03). The lowest probability of mortality also corresponded to cold-mild temperatures and low AP, with a significant increased risk only found for Tmax above 24.3 °C (25 °C: 1.13, 1.01-1.27; 40 °C: 2.05, 1.15-3.64) and APmax (anomaly) above + 3.4 hPa (+ 10 hPa: 1.21, 1.07-1.36; + 30 hPa: 1.73, 1.06-2.81). Sensitivity analysis confirmed the main analysis results. CONCLUSION: Temperature and AP are independently associated with the severity of HF decompensations, with possible different effects on the need for hospitalisation and in-hospital mortality.

Ambient temperature and atmospheric pressure at discharge as precipitating factors in immediate adverse events in patients treated for decompensated heart failure.

To investigate the relationship of ambient temperature and atmospheric pressure (AP) at patient discharge after an episode of acute heart failure (AHF) with very early post-discharge adverse outcomes. We analyzed 14,656 patients discharged after an AHF episode from 26 hospitals in 16 Spanish cities. The primary outcome was the 7-day post-discharge combined adverse event (emergency department -ED- revisit or hospitalization due to AHF, or all-cause death), and secondary outcomes were these three adverse events considered individually. Associations (adjusted for patient and demographic conditions, and length of stay -LOS- during the AHF index episode) of temperature and AP with the primary and secondary outcomes were investigated. We used restricted cubic splines to model the continuous non-linear association of temperature and AP with each endpoint. Some sensitivity analyses were performed. Patients were discharged after a median LOS of 5 days (IQR = 1-10). The highest temperature at discharge ranged from - 2 to 41.6 °C, and AP was from 892 to 1037 hPa. The 7-day post-discharge combined event occurred in 1242 patients (8.4%), with percentages of 7-day ED-revisit, hospitalization and death of 7.8%, 5.1% and 0.9%, respectively. We found no association between the maximal temperature and AP on the day of discharge and the primary or secondary outcomes. Similarly, there were no significant associations when the analyses were restricted to hospitalized patients (median LOS = 7 days, IQR = 4-11) during the index event, or when lag-1, lag-2 or the mean of the 3 post-discharge days (instead of point estimation) of ambient temperature and AP were considered. Temperature and AP on the day of patient discharge are not independently associated with the risk of very early adverse events during the vulnerable post-discharge period in patients discharged after an AHF episode.

Características clínicas, asistenciales y evolutivas de la insuficiencia cardiaca aguda en el clima subtropical: resultados del estudio CANAR-ICA / Acute heart failure in subtropical climates: clinical characteristics, management, and outcomes in the Canary Islands versus continental Spain — the CANAR-ICA study results

Objetivo: Investigar si existen diferencias clínicas, asistenciales y evolutivas entre los episodios de insuficiencia cardiaca aguda (ICA) desarrollados en residentes en las Islas Canarias (CAN), de clima subtropical, y en los del territorio español continental (CON). Método: Los pacientes con ICA incluidos en el registro EAHFE se dividieron en CAN o CON. Se recogieron 38 variables demográficas, de estado clínico basal, clínicas y terapéuticas. Se analizó la mortalidad intrahospitalaria y a los 30 días, la hospitalización prolongada (> 7 días) y el evento combinado post-alta (reconsulta o muerte a 30 días). Se compararon los pacientes CAN y CON, ajustando los resultados por las diferencias entre grupos. Resultados: Se incluyeron 18.390 pacientes: CAN = 697 (3,8%), CON = 17.673 (96,2%). Tras el ajuste, los CAN eran más jóvenes, más frecuentemente mujeres, tenían más antecedentes de hipertensión, diabetes e ICA previa, y estaban en clase funcional más avanzada, pero tenían menos dislipemia, valvulopatías y dependencia funcional, y recibían menos frecuentemente inhibidores del eje renina-angiotensina. Aunque la gravedad del episodio de descompensación fue similar, los CAN recibían más tratamientos endovenosos en urgencias y se hospitalizaban menos. El riesgo ajustado de hospitalización prolongada en los CAN resultó incrementado (OR 2,36; IC 95%:1,52-3,02), pero no hubo diferencias en la mortalidad intrahospitalaria (OR 0,97; IC 95%: 0,68-1,37), a 30 días (OR 0,9; IC 95%: 0,67-1,27) o en los eventos combinados post-alta a los 30 días (OR 1,19; IC 95%: 0,93-1,53). (AU)

Objectives: To determine whether there are differences in the clinical characteristics, management, and outcome of episodes of acute heart failure (AHF) in residents of the Canary Islands, where the climate is subtropical, and episodes in continental Spain. Material and methods: Cases were identified in the registry for Epidemiology of Acute Heart Failure in Emergency Departments and categorized as in the Canary Islands or continental Spain. Data for 38 demographic, baseline, clinical, and therapeutic variables were extracted. We analyzed statistics for in-hospital and 30-day mortality, long hospital stay (more than 7 days), and a composite outcome after discharge (revisits or death within 30 days). The results for island and continental patients were compared and adjusted for between-group differences. Results: A total of 18 390 patients were studied, 697 islanders (3.8%) and 17 673 continental patients (96.2%). Comparisons showed that the islanders were younger; more often women; and more likely to have hypertension, diabetes, and a prior AHF episode. Their New York Heart Association functional class was also likely to be higher. However, their rates of dyslipidemia, valve disease, and functional dependence were lower, and they were also less likely to be on reninangiotensin system blockers. Although the severity of cardiac decompensation was similar in island and continental patients, the islanders received more intravenous treatments in the emergency department and were admitted less often. The adjusted risk of a long hospital stay was higher for the islanders (odds ratio [OR], 2.36; 95% CI, 1.52-3.02) but their risk for mortality and the composite outcome did not differ: in-hospital mortality, OR 0.97 (95% CI, 0.68-1.37); 30-day mortality, OR, 0.9 (95% CI, 0.67-1.27); and the post-discharge composite, OR, 1.19 (95% CI, 0.93-1.53). (AU)

Acute heart failure in subtropical climates: clinical characteristics, management, and outcomes in the Canary Islands versus continental Spain - the CANAR-ICA study results. / Características clínicas, asistenciales y evolutivas de la insuficiencia cardiaca aguda en el clima subtropical: resultados del estudio CANAR-ICA.

OBJECTIVES: To determine whether there are differences in the clinical characteristics, management, and outcome of episodes of acute heart failure (AHF) in residents of the Canary Islands, where the climate is subtropical, and episodes in continental Spain. MATERIAL AND METHODS: Cases were identified in the registry for Epidemiology of Acute Heart Failure in Emergency Departments and categorized as in the Canary Islands or continental Spain. Data for 38 demographic, baseline, clinical, and therapeutic variables were extracted. We analyzed statistics for in-hospital and 30-day mortality, long hospital stay (more than 7 days), and a composite outcome after discharge (revisits or death within 30 days). The results for island and continental patients were compared and adjusted for between-group differences. RESULTS: A total of 18 390 patients were studied, 697 islanders (3.8%) and 17 673 continental patients (96.2%). Comparisons showed that the islanders were younger; more often women; and more likely to have hypertension, diabetes, and a prior AHF episode. Their New York Heart Association functional class was also likely to be higher. However, their rates of dyslipidemia, valve disease, and functional dependence were lower, and they were also less likely to be on reninangiotensin system blockers. Although the severity of cardiac decompensation was similar in island and continental patients, the islanders received more intravenous treatments in the emergency department and were admitted less often. The adjusted risk of a long hospital stay was higher for the islanders (odds ratio [OR], 2.36; 95% CI, 1.52-3.02) but their risk for mortality and the composite outcome did not differ: in-hospital mortality, OR 0.97 (95% CI, 0.68-1.37); 30-day mortality, OR, 0.9 (95% CI, 0.67-1.27); and the post-discharge composite, OR, 1.19 (95% CI, 0.93-1.53). CONCLUSION: Baseline patient characteristics and clinical management of AHF episodes differ between the subtropical region and those in southern continental Europe. Hospitalization was required less often, but hospital stays were longer.

OBJETIVO: Investigar si existen diferencias clínicas, asistenciales y evolutivas entre los episodios de insuficiencia cardiaca aguda (ICA) desarrollados en residentes en las Islas Canarias (CAN), de clima subtropical, y en los del territorio español continental (CON). METODO: . Los pacientes con ICA incluidos en el registro EAHFE se dividieron en CAN o CON. Se recogieron 38 variables demográficas, de estado clínico basal, clínicas y terapéuticas. Se analizó la mortalidad intrahospitalaria y a los 30 días, la hospitalización prolongada (> 7 días) y el evento combinado post-alta (reconsulta o muerte a 30 días). Se compararon los pacientes CAN y CON, ajustando los resultados por las diferencias entre grupos. RESULTADOS: Se incluyeron 18.390 pacientes: CAN = 697 (3,8%), CON = 17.673 (96,2%). Tras el ajuste, los CAN eran más jóvenes, más frecuentemente mujeres, tenían más antecedentes de hipertensión, diabetes e ICA previa, y estaban en clase funcional más avanzada, pero tenían menos dislipemia, valvulopatías y dependencia funcional, y recibían menos frecuentemente inhibidores del eje renina-angiotensina. Aunque la gravedad del episodio de descompensación fue similar, los CAN recibían más tratamientos endovenosos en urgencias y se hospitalizaban menos. El riesgo ajustado de hospitalización prolongada en los CAN resultó incrementado (OR 2,36; IC 95%:1,52-3,02), pero no hubo diferencias en la mortalidad intrahospitalaria (OR 0,97; IC 95%: 0,68-1,37), a 30 días (OR 0,9; IC 95%: 0,67-1,27) o en los eventos combinados post-alta a los 30 días (OR 1,19; IC 95%: 0,93-1,53). CONCLUSIONES: Existen diferencias tanto en las características basales como en el manejo clínico de los episodios de insuficiencia cardiaca en los residentes de una región subtropical respecto a los de una zona meridional europea. Además, tienen menor necesidad de hospitalización, aunque estas son más prolongadas.

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Síndrome acetaldehídico por exposición laboral a cianamida de hidrógeno / Acetaldehyde syndrome after laboral exposition to hydrogen cyanamide

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