The effects of obesity on longitudinal ventricular and atrial strain in a rural population of Spanish children and adolescents, evaluated by a new strain software.

BACKGROUND AND OBJECTIVES: Research on the relationship between body mass index (BMI) and strain values in children and adolescents is limited. Our aim was to analyse the relationship between BMI and strain values of both ventricles and left atrium in children and adolescents. METHODS: Both ventricles and left atrial strain values were compared among different BMI categories in children and adolescents from a town in the South of Spain. RESULTS: Of the 198 subjects, aged 6-17 years, 53% were of normal weight, 26% were overweight and 21% had obesity. Lower absolute values of left ventricular global longitudinal strain (25.9 ± 2.0% vs. 26.9 ± 2.2%, p = 0.002) and right ventricular free wall longitudinal strain (29.5 ± 4.2% vs. 30.8 ± 4.5%, p = 0.04) were found in subjects with obesity and overweight versus subjects with normal weight. A lower right ventricular four-chamber longitudinal strain was also observed in males with obesity and overweight (24.8 ± 3.3% vs. 26.4 ± 3.6%, p = 0.03). Statistically significant negative correlations of BMI were found for all ventricular, but not atrial, strain values in univariate analysis. This association turned non-significant for right ventricular four-chamber longitudinal strain in multivariate analysis. CONCLUSIONS: Utilizing this new strain software, children and adolescents with high BMI were associated with significantly lower values for left and right ventricular free wall longitudinal strain, without impact in left atrial strain.

Diagnostic accuracy of anthropometric indices for metabolically healthy obesity in child and adolescent population.

BACKGROUND: A variable percentage of children and adolescents with obesity do not have cardiometabolic comorbidities. A phenotype called metabolically healthy obese (MHO) has emerged to describe this population subgroup. Early identification of this condition may prevent the progression to metabolically unhealthy obesity (MUO). MATERIAL AND METHODS: A cross-sectional descriptive study of 265 children and adolescents from Cordoba (Spain) conducted in 2018. The outcome variables were MHO, established based on three criteria: International Criterion, HOMA-IR, and a combination of the previous two. RESULTS: The prevalence of MHO ranged from 9.4% to 12.8% of the study population, between 41% and 55.7% of the sample with obesity. The highest agreement was reached between the HOMA-IR definitions and the combined criteria. The waist-to-height ratio (WHtR) was the indicator with the highest discriminant capacity for MHO in 2 of the three criteria, with its best cut-off point at 0.47 for both. CONCLUSION: The prevalence of MHO in children and adolescents differed according to the criteria used for diagnosis. The anthropometric variable with the most remarkable discriminating capacity for MHO was WHtR, with the same cut-off point in the three criteria analysed. IMPACT STATEMENT: This research work defines the existence of metabolically healthy obesity through anthropometric indicators in children and adolescents. Definitions that combine cardiometabolic criteria and insulin resistance are used to identify metabolically healthy obesity, as well as the prediction of this phenomenon through anthropometric variables. The present investigation helps to identify metabolically healthy obesity before metabolic abnormalities begin.

The Assessment of Myocardial Longitudinal Strain in a Paediatric Spanish Population Using a New Software Analysis.

BACKGROUND: Two-dimensional speckle-tracking echocardiography (2DSTE) has been present for years. However, it is underutilized due to the expertise and time requirements for its analysis. Our aims were to provide strain values in a paediatric Spanish population and to assess the feasibility and reproducibility of a new strain software analysis in our environment. METHODS: A cross-sectional study of 156 healthy children aged 6 to 17 years. Longitudinal strain (LS) analysis of the left ventricle, right ventricle, and left atrium was performed. Feasibility and reproducibility were assessed. The associations of clinical and echocardiographic variables with strain values were investigated by multivariate analysis. RESULTS: Mean age was 11 ± 3 years (50% female). Feasibility of LS measurement ranged from 94.2% for left ventricle global LS (LVGLS) to 98.1% for other chamber strain parameters. Strain values were 26.7 ± 2.3% for LVGLS; 30.5 ± 4.4% and 26.9 ± 4% for right ventricle free wall LS (RVFWLS) and four chambers view LS (RV4CLS) respectively; and 57.8 ± 10.5%, 44.9 ± 9.5%, and 12.9 ± 5.5% for left atrium LS reservoir phase (LALSr), conduct phase (LALScd) and contraction phase (LALSct), also respectively. Body surface area (BSA) and age presented a negative correlation with strain values. Higher values were found in females than in males, except for LALScd. Excellent intra- and inter-observer reproducibility were found for right and left ventricular strain measurement, with intraclass correlation coefficients (ICC) ranging from 0.88 to 0.98, respectively. In conclusion, we described strain values in a healthy Spanish paediatric population. LS assessment by this new strain analysis software by semi-automatic manner was highly feasible and reproducible.

Estudio de la obesidad en una población infantil rural y su relación con variables antropométricas / Study of obesity in a rural children population and its relationship with anthropometric variables

Objetivos: Conocer la prevalencia de obesidad en escolares de educación primaria y secundaria, y evaluar la precisión diagnóstica de variables antropométricas para su detección. Diseño: Estudio transversal. Año 2014. Emplazamiento: Área rural de Córdoba. Participantes: Población estudiantil. Se llevó a cabo un muestreo estratificado por edad, género y centros educativos. Un total de 323 alumnos de 6 a 16 años fueron estudiados, cuyos padres habían firmado el consentimiento informado. Mediciones principales: Se determinó la prevalencia de obesidad y se recogieron variables predictoras sociodemográficas, antropométricas, de condición física y alimentación. Se realizó una regresión logística binaria determinando los valores de odds ratio (OR) crudas y ajustadas, se confeccionaron curvas ROC y se determinaron valores de corte, calculando la sensibilidad, la especificidad y el índice de Youden. Resultados: La prevalencia de sobrepeso y obesidad fue del 26,2 y 22,3%, respectivamente. Solo un 15,2% de los escolares realizó dieta mediterránea óptima. El índice cintura-altura (ICT) fue la variable predictiva con mayor OR ajustada (7,1 [4,3-11,6]) y mayor área bajo la curva (0,954 [0,928-0,979]); a partir de un valor de corte global para discriminar obesidad de 0,507, consiguió una sensibilidad del 90% y una especificidad del 87,2%. Conclusiones: La alta prevalencia de obesidad, la media-baja adherencia a la dieta mediterránea y la baja condición física hacen de esta población un objetivo prioritario de actuación para la prevención de futuros eventos cardiovasculares. El ICT ha sido el mejor predictor antropométrico de obesidad, recomendándose su uso para el diagnóstico de obesidad en población infantil en detrimento del índice de masa corporal

Goals: To know the prevalence of obesity in primary and secondary school students, and to evaluate the diagnostic accuracy of anthropometric variables for its detection. Design: Cross-sectional study. Location: Rural area of Córdoba. In the year 2014. Participants: Student population. A stratified sampling was performed according to age, gender and educational centers. A total of 323 students from 6 to 16 years were included in the study, all parents had signed informed consent. Main measurements: The prevalence of obesity was determined and sociodemographic, anthropometric, physical condition and dietary predictor variables were collected. A binary logistic regression was performed determining crude and adjusted Odds Ratio (OR) values, ROC curves were obtained and cut-off values were determined, calculating the sensitivity, specificity and Youden index. Results: The prevalence of overweight and obesity was 26.2% and 22.3%, respectively. Only 15.2% of school children had an optimal Mediterranean diet. The waist-height ratio (WtHR) was the predictive variable with the highest adjusted OR 7.1 (4.3-11.6) and the largest area under the curve 0.954 (0.928-0.979), from a global cut-off value to discriminate obesity of 0.507. This gave a sensitivity of 90% and specificity of 87.2%. Conclusions: The high prevalence of obesity, the low-medium adherence to the Mediterranean diet and the low physical fitness make this population a priority target for the prevention of future cardiovascular events. The WtHR has been the best anthropometric predictor of obesity, recommending its use for the diagnosis of obesity in children at the expense of body mass index

[Study of obesity in a rural children population and its relationship with anthropometric variables]. / Estudio de la obesidad en una población infantil rural y su relación con variables antropométricas.

GOALS: To know the prevalence of obesity in primary and secondary school students, and to evaluate the diagnostic accuracy of anthropometric variables for its detection. DESIGN: Cross-sectional study. LOCATION: Rural area of Córdoba. In the year 2014. PARTICIPANTS: Student population. A stratified sampling was performed according to age, gender and educational centers. A total of 323 students from 6 to 16 years were included in the study, all parents had signed informed consent. MAIN MEASUREMENTS: The prevalence of obesity was determined and sociodemographic, anthropometric, physical condition and dietary predictor variables were collected. A binary logistic regression was performed determining crude and adjusted Odds Ratio (OR) values, ROC curves were obtained and cut-off values were determined, calculating the sensitivity, specificity and Youden index. RESULTS: The prevalence of overweight and obesity was 26.2% and 22.3%, respectively. Only 15.2% of school children had an optimal Mediterranean diet. The waist-height ratio (WtHR) was the predictive variable with the highest adjusted OR 7.1 (4.3-11.6) and the largest area under the curve 0.954 (0.928-0.979), from a global cut-off value to discriminate obesity of 0.507. This gave a sensitivity of 90% and specificity of 87.2%. CONCLUSIONS: The high prevalence of obesity, the low-medium adherence to the Mediterranean diet and the low physical fitness make this population a priority target for the prevention of future cardiovascular events. The WtHR has been the best anthropometric predictor of obesity, recommending its use for the diagnosis of obesity in children at the expense of body mass index.

Sudden headache, lumbar puncture, and the diagnosis of subarachnoid hemorrhage in patients with a normal computed tomography scans. / Cefalea súbita, punción lumbar y diagnóstico de hemorragia subaracnoidea en pacientes con una tomografía computarizada normal.

OBJECTIVES: To assess the usefulness of computed tomography (CT) to identify subarachnoid bleeding in patients with neurologic deficits seeking emergency care for sudden headache within 6 hours of onset of symptoms. MATERIAL AND METHODS: Retrospective observational study of patients presenting with sudden nontraumatic headache peaking during the previous hour in the absence of neurologic deficits. We ordered CT scans for all patients, and if the scan was normal we performed a lumbar puncture. All patients were then followed for 6 months. RESULTS: Eighty-five patients were included. Subarachnoid bleeding was identified in 10 (10.2%) patients by CT. Seventy- four lumbar punctures were performed in patients with negative CTs; the lumbar puncture was positive in 1 patient and inconclusive in 2 patients. In all 3 patients, bleeding was ruled out with later images; thus, no cases of subarachnoid hemorrhage were confirmed in the 74 patients who underwent lumbar puncture. Nor were any cases found in any of these patients during follow-up. CONCLUSION: A CT scan taken within 6 hours of onset of sudden headache is sufficient for confirming or ruling out subarachnoid bleeding in patients with sudden headache who have no neurologic deficits.

OBJETIVO: Valorar la utilidad de la tomografía computarizada (TC) para identificar la hemorragia subaracnoidea (HSA) en pacientes que consultan en el servicio de urgencias por cefalea súbita sin déficit neurológico dentro de las seis primeras horas desde el comienzo de los síntomas. METODO: Estudio observacional, retrospectivo, de pacientes que consultaron por cefalea súbita, no traumática, con un pico de máxima intensidad dentro de la hora previa y sin déficit neurológico. A todos los pacientes se les realizó una TC seguida de una punción lumbar (PL) si la TC era normal, y seguimiento a los 6 meses. RESULTADOS: Se incluyeron 85 pacientes. Se diagnosticaron 10 (10,2%) casos de HSA en la TC, y se realizaron 74 PL, en pacientes con una TC negativa, de las que una fue positiva y dos no concluyentes, pero en estudios posteriores de imagen se descartó la HSA. En total, la PL en 74 pacientes con TC normal no confirmó ningún caso de HSA. Tampoco se confirmó ningún caso durante el seguimiento. CONCLUSIONES: En los pacientes con cefalea súbita y sospecha de HSA, sin inconsciencia ni focalidad neurológica, una TC de alta resolución realizada en las primeras 6 horas desde la aparición de la cefalea fue suficiente para confirmar o descartar ese diagnóstico.

Cefalea súbita, punción lumbar y diagnóstico de hemorragia subaracnoidea en pacientes con una tomografía computarizada normal / Sudden headache, lumbar puncture, and the diagnosis of subarachnoid hemorrhage in patients with a normal computed tomography scans

Objetivo. Valorar la utilidad de la tomografía computarizada (TC) para identificar la hemorragia subaracnoidea (HSA) en pacientes que consultan en el servicio de urgencias por cefalea súbita sin déficit neurológico dentro de las seis primeras horas desde el comienzo de los síntomas. Método. Estudio observacional, retrospectivo, de pacientes que consultaron por cefalea súbita, no traumática, con un pico de máxima intensidad dentro de la hora previa y sin déficit neurológico. A todos los pacientes se les realizó una TC seguida de una punción lumbar (PL) si la TC era normal, y seguimiento a los 6 meses. Resultados. Se incluyeron 85 pacientes. Se diagnosticaron 10 (10,2%) casos de HSA en la TC, y se realizaron 74 PL, en pacientes con una TC negativa, de las que una fue positiva y dos no concluyentes, pero en estudios posteriores de imagen se descartó la HSA. En total, la PL en 74 pacientes con TC normal no confirmó ningún caso de HSA. Tampoco se confirmó ningún caso durante el seguimiento. Conclusiones. En los pacientes con cefalea súbita y sospecha de HSA, sin inconsciencia ni focalidad neurológica, una TC de alta resolución realizada en las primeras 6 horas desde la aparición de la cefalea fue suficiente para confirmar o descartar ese diagnóstico (AU)

Objective. To assess the usefulness of computed tomography (CT) to identify subarachnoid bleeding in patients with neurologic deficits seeking emergency care for sudden headache within 6 hours of onset of symptoms. Methods. Retrospective observational study of patients presenting with sudden nontraumatic headache peaking during the previous hour in the absence of neurologic deficits. We ordered CT scans for all patients, and if the scan was normal we performed a lumbar puncture. All patients were then followed for 6 months. Results. Eighty-five patients were included. Subarachnoid bleeding was identified in 10 (10.2%) patients by CT. Seventy-four lumbar punctures were performed in patients with negative CTs; the lumbar puncture was positive in 1 patient and inconclusive in 2 patients. In all 3 patients, bleeding was ruled out with later images; thus, no cases of subarachnoid hemorrhage were confirmed in the 74 patients who underwent lumbar puncture. Nor were any cases found in any of these patients during follow-up. Conclusions. A CT scan taken within 6 hours of onset of sudden headache is sufficient for confirming or ruling out subarachnoid bleeding in patients with sudden headache who have no neurologic déficits (AU)

Catastrophic antiphospholipid antibody syndrome presenting as acute vascular occlusion in a young female patient / Síndrome de anticuerpos antifosfolípidos catastrófico que se presenta con oclusión vascular aguda en una paciente joven

Acquired thrombotic and thromboembolic disorders may be presented initially with symptoms and signs of acute ischaemia or organ dysfunction that will lead many of these patients to seek care in the emergency department. We report a case of a 19-year-old female patient who developed catastrophic antiphospholipid syndrome (CAPS syndrome or Asherson syndrome) 6 weeks post stillbirth with an initial presentation of acute vascular occlusion. The patient was immediately operated and anticoagulated with significant improvement (AU)

Los trastornos trombóticos y tromboembólicos adquiridos pueden manifestarse inicialmente con signos y síntomas de isquemia aguda o disfunción orgánica que derivará a muchos de estos pacientes al servicio de urgencias. Se presenta el caso de una paciente de 19 años de edad que desarrolló un síndrome antifosfolípido catastrófico (o síndrome de Asherson) 6 semanas después del parto de un feto muerto con una presentación inicial de oclusión vascular aguda. La paciente fue intervenida inmediatamente y se inició un tratamiento con anticoagulantes que supuso una mejora significativa (AU)

Physical fitness as an indicator of health status and its relationship to academic performance during the prepubertal period.

Background: Physical activity (PA) is considered one of the most important determinants of the health status in children, and predictor of morbidity/mortality in adults. The aim is to examine the relationship between physical fitness (PF), PA, obesity and academic performance (AP) in primary school children. Methods: Cross-sectional studies including 91 primary school students, aged 9 to 12 years, from the province of Córdoba. Data was collected from April to June 2014. We measured PF using part of the EUROFIT fitness testing battery. The level of PA was measured as low or high PF and the level of obesity was measured using body mass index, waist circumference, percentage of fat mass, lean body mass, percentage of lean mass and basal metabolism. AP by scores on the second quarter was based on the total average of scores of basic subjects and other subjects, including physical education. Cognitive performance was assessed by the Spanish overall and factorial intelligence test. Results: The results of AP were positively related to levels of PF. Students who achieve better PF score better in Maths, (P=0.019), Natural Sciences (P=0.024), Religion (P=0.018) and Physical Education (P<0.001). A direct association between maximal aerobic capacity with Mathematics (r=0.325, P=0.02), AP (r=0.349, P=0.001) and cognitive performance (CP)(r=0.312, P=0.003) was observed. There was also a direct association of better jump tests with higher AP (r=0.328, P=0.002). Conclusion: The AP is associated with higher levels of fitness. Therefore, the education system should consider implementing curriculum strategies favouring the improvement of the PF, and therefore the health and AP of students.

Comparación de la regla canadiense y los criterios de New Orleans en el traumatismo craneal leve en un hospital español / Comparison of the Canadian CT head rule and the New Orleans criteria in patients with minor head injury in a Spanish hospital

Fundamento y objetivo: Comparar 2 escalas para la valoración de pacientes con traumatismo craneoencefálico (TCE) leve, la regla canadiense (EC) y los criterios de New Orleans (NO), de acuerdo a su precisión diagnóstica, en pacientes que acuden a un servicio de urgencias hospitalario, así como determinar los valores predictivos más importantes. Método: Estudio transversal realizado en un hospital de primer nivel en el periodo de enero del 2011 a enero del 2013. Se incluyeron los pacientes con criterios de TCE leve. A todos los pacientes se les realizó una tomografía computarizada (TC) de cráneo como parte del protocolo interno y se completó con la EC y los criterios de NO. Consideramos como variable principal la presencia de lesiones traumáticas en el TC, y como variables secundarias la intervención neuroquirúrgica y el síndrome posconmocional. Se compararon la sensibilidad, especificidad, los valores predictivos y el índice de validez (IV) de la EC y de los criterios de NO en el subgrupo de pacientes con una puntuación en la escala de coma de Glasgow (GCS) de 15 puntos. Resultados: Se evaluaron un total de 217 pacientes, de los que 197 presentaban una puntuación en la GCS de 15 puntos. Ambas escalas mostraban un 100% de sensibilidad cuando se presentaba una lesión importante en el TC, la EC 100% (IC 95%: 97,4-100%) y los criterios de NO 100% (IC 95%: 97,4-100%), pero la EC consiguió mayores valores de especificidad 25,3% (IC 95%: 18,6-32%), valor predictivo positivo (VPP) e IV. Las 2 escalas mostraron un 100% de sensibilidad en relación con la intervención neuroquirúrgica, y la EC con criterios de alto riesgo consiguió, claramente, una mayor especificidad, VPP e IV de 55,2 (IC 95%: 8,3-62,2%) vs. 7,6 (IC 95%: 3,8-11,5%) de NO. Con respecto al síndrome posconmocional, los criterios de NO mostraron mayor sensibilidad 100% (IC 95%: 96,2-100%) y valores predictivos, aunque menor especificidad e IV comparado con la EC 76,9% (IC 95%: 50,2-100%). Conclusiones: Nuestro estudio demuestra la alta sensibilidad de la EC y de los criterios de NO en pacientes con TCE leve tanto para detectar una lesión clínica importante en el TC como la necesidad de una intervención neuroquirúrgica, así como una mejor especificidad de la EC comparada con los criterios de NO. Se recomienda la adopción de reglas de predicción clínica, en especial de la EC, para la solicitud de un TC de cráneo en pacientes con TCE leve (AU)

Background and objective: To compare two scales for assessment of patients with mild head injury. The Canadian CT Head Rule (CCHR) and New Orleans Criteria (NOC) according to their diagnostic accuracy in patients attending an emergency department, and to determine the most important predictive values. Method: Cross-sectional study in a first-level Hospital in the period of January 2011 to January 2013. Patients with mild head injury criteria were included. All the patients underwent a computed tomography (CT) of the head as part of internal protocol and the CCHR and NOC criteria were recorded for each patient. We consider the main variable the presence of traumatic lesions on CT and, as secondary variables, neurosurgical intervention and post-concussion syndrome. Sensitivity, specificity, predictive values and validity index (VI) of the CCHR and the NO criteria in the subgroup of patients with a Glasgow Coma Scale (GCS) score of 15 points were compared. Results: A total of 217 patients, of whom 197 had a GCS score of 15 points were evaluated. Both rules showed 100% sensitivity when a significant injury was presented in the CT, the CCHR 100% (95% CI: 97.4%-100%) and the NO criteria 100% (95% CI: 97.4%-100%); but the CCHR achieved higher values of specificity 25.3% (95% CI: 18.6%-32%), positive predictive value (PPV) and VI. The two rules showed a 100% sensitivity regarding neurosurgical intervention; however the CCHR with high-risk criteria showed better specificity, PPV and VI 55.2 (95% CI: 8.3%-62.2%) compared to the NO criteria 7.6 (95% CI: 3.8%-11.5%). With regard to post-concussion syndrome criteria NO criteria showed better sensitivity 100% (95% CI: 96.2%-100%) and predictive values, but lower specificity and VI compared with the CCHR 76.9% (95% CI: 50.2%-100%). Conclusions: Our study demonstrates the high sensitivity of the CCHR and the NO criteria in patients with mild head injury, both to detect a significant clinical lesion on CT or the need for neurosurgical intervention and better specificity of CCHR compared with NO criteria. The adoption of clinical prediction rules, especially the CCHR, to request a CT scan in patients with mild head injury should be recommended in the emergency department (AU)

Comparison of the Canadian CT head rule and the New Orleans criteria in patients with minor head injury in a Spanish hospital. / Comparación de la regla canadiense y los criterios de New Orleans en el traumatismo craneal leve en un hospital español.

BACKGROUND AND OBJECTIVE: To compare two scales for assessment of patients with mild head injury. The Canadian CT Head Rule (CCHR) and New Orleans Criteria (NOC) according to their diagnostic accuracy in patients attending an emergency department, and to determine the most important predictive values. METHOD: Cross-sectional study in a first-level Hospital in the period of January 2011 to January 2013. Patients with mild head injury criteria were included. All the patients underwent a computed tomography (CT) of the head as part of internal protocol and the CCHR and NOC criteria were recorded for each patient. We consider the main variable the presence of traumatic lesions on CT and, as secondary variables, neurosurgical intervention and post-concussion syndrome. Sensitivity, specificity, predictive values and validity index (VI) of the CCHR and the NO criteria in the subgroup of patients with a Glasgow Coma Scale (GCS) score of 15 points were compared. RESULTS: A total of 217 patients, of whom 197 had a GCS score of 15 points were evaluated. Both rules showed 100% sensitivity when a significant injury was presented in the CT, the CCHR 100% (95% CI: 97.4%-100%) and the NO criteria 100% (95% CI: 97.4%-100%); but the CCHR achieved higher values of specificity 25.3% (95% CI: 18.6%-32%), positive predictive value (PPV) and VI. The two rules showed a 100% sensitivity regarding neurosurgical intervention; however the CCHR with high-risk criteria showed better specificity, PPV and VI 55.2 (95% CI: 8.3%-62.2%) compared to the NO criteria 7.6 (95% CI: 3.8%-11.5%). With regard to post-concussion syndrome criteria NO criteria showed better sensitivity 100% (95% CI: 96.2%-100%) and predictive values, but lower specificity and VI compared with the CCHR 76.9% (95% CI: 50.2%-100%). CONCLUSIONS: Our study demonstrates the high sensitivity of the CCHR and the NO criteria in patients with mild head injury, both to detect a significant clinical lesion on CT or the need for neurosurgical intervention and better specificity of CCHR compared with NO criteria. The adoption of clinical prediction rules, especially the CCHR, to request a CT scan in patients with mild head injury should be recommended in the emergency department.

Basic life support knowledge of secondary school students in cardiopulmonary resuscitation training using a song.

OBJECTIVES: To examine the effectiveness of a "cardiopulmonary resuscitation song" in improving the basic life support skills of secondary school students. METHODS: This pre-test/post-test control design study enrolled secondary school students from two middle schools randomly chosen in Córdoba, Andalucia, Spain. The study included 608 teenagers. A random sample of 87 students in the intervention group and 35 in the control group, aged 12-14 years were selected. The intervention included a cardiopulmonary resuscitation song and video. A questionnaire was conducted at three-time points: pre-intervention, one month and eight months post-intervention. RESULTS: On global knowledge of cardiopulmonary resuscitation, there were no significant differences between the intervention group and the control group in the trial pre-intervention and at the month post-intervention. However, at 8 months there were significant differences with a p-value = 0.000 (intervention group, 95% CI: 6.39 to 7.13 vs. control group, 95% CI: 4.75 to 5.92), F(1,120)=16.644, p=0.000). In addition, significant differences about students' basic life support knowledge about chest compressions at eight months post-intervention (F(1,120)=15.561, p=0.000) were found. CONCLUSIONS: Our study showed that incorporating the song component in the cardiopulmonary resuscitation teaching increased its effectiveness and the ability to remember the cardiopulmonary resuscitation algorithm. Our study highlights the need for different methods in the cardiopulmonary resuscitation teaching to facilitate knowledge retention and increase the number of positive outcomes after sudden cardiac arrest.