Conciencia de enfermedad cardiovascular y conocimiento sobre factores de riesgo y prevención cardiovascular: resultados chilenos de encuesta SIAC cono sur / Awareness of risk factors and prevention of cardiovascular disease in chile: SIAC cono sur survey

Resumen La conciencia de la enfermedad cardiovascular (ECV) en mujeres es crucial para prevenir futuros eventos cardiovasculares. En Chile, la percepción sobre ECV es baja. Objetivo: Actualizar el grado de conocimiento de las chilenas sobre ECV. Método: Estudio de corte transversal realizado a través de encuesta online a mujeres entre 20 y 70 años de edad, residentes en Chile durante marzo 2020. La invitación se efectuó a través de redes sociales. La muestra fue no probabilística, ponderándose por edad, nivel socioeconómico y región de residencia (Región Metropolitana, Coquimbo, Valparaíso, Bío-Bío). Resultados: Se obtuvieron 1227 cuestionarios validados. La muestra ponderada correspondió a 900 mujeres. La percepción de ECV como principal causa de muerte fue de 8%, menor que las correspondientes a cáncer de mama (44%) y muerte violenta / homicidio (20%). Como principal problema de salud, la opción más percibida fue cáncer general (39%), seguido de diabetes (18%). Sólo 6 % refirió la ECV como el principal problema. Los principales accesos a la información sobre ECV fueron la internet y las redes sociales (64%, mayor en <30 años), y en el consultorio (32%). La opresión o dolor en el pecho fueron los síntomas más reconocidos asociados al infarto, siendo más seleccionado por mujeres con nivel educacional alto (p< 0.05). Conclusión: Persiste una baja percepción del riesgo de la ECV como principal causa de muerte y problema de salud en mujeres chilenas, aunque tienen acceso a la información y reconocen síntomas de infarto. Es necesario adaptar las estrategias comunicacionales para incrementar la percepción de riesgo CV.

Abstract Awareness of cardiovascular disease (CVD) in women is crucial to prevent cardiovascular events. According to prior information the perception and knowledge about CVD in Chile is extremely low. The aim of this study was to update the information about awareness of CVD in Chilean women. Method: Cross-sectional study carried out through an online survey. Data was obtained from women between 20 and 70 years old during March 2020. Social networks were used to recruit participants. The sample was non-probabilistic, weighted by age, socio-economic level and region of residence (Metropolitan Region, Coquimbo, Valparaíso, Bío-Bío). Results: 1227 validated surveys were obtained. The weighted sample corresponded to 900 women. CVD was perceived as the main cause of death in 8% of women, compared to higher degrees of perception for breast cancer (44%) and violent death/homicide (20%). CVD was perceived as the main health problem by only 6% of women, compared to cancer (39%) and diabetes (18%). The primary source of information about CVD were the internet and social networks (64%,higher in women <30 years old), and the doctor's office (32%). Chest tightness or pain as symptoms associated with a heart attack were significantly more recognized by respondents with a high educational level (p<0.05). Conclusion: An extremely low awareness about CVD as the main cause of death and health problem is persistent in Chilean women, notwithstanding that they have access to information and recognize symptoms of a heart attack. It is necessary to modify our communication strategies to increase the perception of CV risk in Chilean women.

Superioridad del nuevo puntaje de riesgo ACC/AHA 2013 por sobre el puntaje de Framingham, en la predicción de riesgo de mortalidad cardiovascular en Santiago / Evaluation the American College of Cardiology and American Heart Association Predictive score for cardiovascular diseases

Background: Recently, the American College of Cardiology and American Heart Association (ACC/AHA) proposed a new cardiovascular risk (CV) score. Aim: To evaluate the new risk score (ACC/AHA 2013) in a Chilean population. Material and Methods: Between 2002 and 2014, body mass index (BMI), waist circumference, blood pressure, lipid profile and fasting blood glucose levels were measured and a survey about CV risk factors was responded by 3,284 subjects aged 40 to 79 years (38% females), living in urban Santiago. ACC/AHA 2013, FRAM and Chilean FRAM scores were calculated. All-cause mortality was determined in July 2014 by consulting the Death Registry of the Chilean Identification Service, with an average follow up of 7 ± 3 years. Results: The prevalence of risk factors were 78% for dyslipidemia, 37% for hypertension, 20% for smoking, 7% for diabetes, 20% for obesity and 54% for physical inactivity. The mean FRAM, Chilean FRAM and ACC/AHA scores were 8, 3 and 9%, respectively. During follow-up, 94 participants died and 34 deaths were of cardiovascular cause. Participants who died had a higher prevalence of hypertension (p < 0.01) and diabetes (p < 0. 01) and tended to be older (p = 0.06). The FRAM score for 10 years for deceased and surviving patients was 12 and 8%, respectively (p = NS). The figures for the Chilean FRAM were 5 and 2%, respectively (p = 0.09). The figures for the ACC/AHA 2013 score were 33 and 9%, respectively (p = 0.04). According to receiver operating characteristic curves, ACC/AHA 2013 had a higher area under de curve for CV mortality than FRAM and Chilean FRAM. Conclusions: The new ACC/AHA 2013 score, is better than traditional FRAM and Chilean FRAM scores in predicting cardiovascular mortality in a low risk population.

Prevalencia y determinantes de adherencia a terapia antihipertensiva en pacientes de la Región Metropolitana / Assessment of adherence to antihypertensive therapy

Background: Lack of adherence with medications is the main cause of antihypertensive treatment failure. Aim: To assess adherence to antihypertensive drugs and its determinants. Material and Methods: The Morinsky-Green questionnaire to determine treatment adherence was applied to 310 hypertensive patients from primary care centers, aged 60 ± 10 years (65% females) in treatment for 4 ± 1 months. Socio-demographic features, use of medications and quality of life using EQ5D questionnaire were also assessed. Results: Twenty percent of patients were diabetic and 19% were smokers. Fifty four percent were adherent to therapy. A higher age and being unemployed were associated with a higher compliance. The main reasons to justify the lack of adherence were forgetting to take the pills in 67% and adverse effects in 10%. Only diastolic pressure was lower in adherent patients, compared with their non-adherent counterparts (78 ± 12 and 81 ± 17 mmHg, respectively p < 0.01). Conclusions: Only half of hypertensive patients comply with their antihypertensive therapy.

Agregación de factores de riesgo cardiovascular y conciencia de enfermedad en trabajadores de un hospital universitario / Cardiovascular risk factors in a group of health care workers

Background: Health promotion can be carried out at work places. Aim: To assess cardiovascular risk factors among workers of a University hospital. Material and Methods: Cross sectional study of 888 participants (aged 41 ± 11 years, 76% women), who answered a survey about cardiovascular risk factors. Body mass index, waist, blood pressure and total cholesterol (TC) by capillary method were determined. Results: Self reported prevalence of risk factors were as follows: 19% of participants had high blood pressure, 30% hypercholesterolemia, 6% diabetes, 41% smoked, 88% were sedentary and 26% had a family history of cardiovascular diseases. Five percent of participants did not have any risk factor, 20% had one risk factor, 32% had two and 43% had three or more. The highest frequency of lack of awareness was about blood glucose values. A high blood cholesterol level was found in 27% of those reporting normal cholesterol levels. Likewise, a high body mass index was found in 18% of those reporting a normal weight. Conclusions: The prevalence of cardiovascular risk factors in this group of participants is similar to that found in the last national health survey in Chile. Noteworthy is the lack of awareness about these risk factors.

Hipertensión arterial: el factor de riesgo más importante para grosor íntima-media carotídeo elevado y placa carotídea en adultos de Santiago / Risk factors for a high carotid intima media thickness among healthy adults

Background: Carotid intima media thickness (CIMT) is a marker of cardiovascular damage that can be modified by traditional risk factors. Aim: To determine attributable risk factors for a high CIMT among healthy adults. Material ana Methods: A sample of 1270 individuáis (636 males and 634 femóles) aged 44 ±11 years, was studied. Blood pressure, weight, height, lipidprofile and blood glucose were measured in all. CIMT and thepresence of atheroscleroticplaques were determined by carotid ultrasound. Standard criteria were used to define hypertension, dyslipidemia and diabetes. Results: Mean CIMT in the sample studied was 0.62 ± 0.01 mm and percentile 75 was 0.67. The most important risk factor for a CIMT over percentile 75 and thepresence of atherosclerotic plaques was hypertension with attributable risks of 54 and 57 percent, respectively. Conclusions: In this sample, the main risk factor for a high CIMT was hypertension.

Modificación del grosor intima-media carotídeo según factores de riesgo clásicos y síndrome metabólico con o sin inflamación / Relation of intima-media thickness, traditional risk factors and metabolic syndrome in subjects with or without inflammation

El grosor intima-media carotideo (CIMT) es un marcador de aterosclerosis subclinica y eventos isquémicos cerebrales y coronarios. Si bien los valores normales promedio en Chile, han sido publicados, no existen datos locales de cómo se modifica el CIMT según la carga de factores de riesgo (FR) cardiovascular. Objetivos: Analizar la modificación del CIMT según la carga de FR clásicos, presencia de síndrome metabólico (SMET) y SMET más inflamación. Métodos: Hombres y mujeres de Santiago sin antecedente de eventos isquémicos previos, nivel socio económico medio, medio bajo y medio alto. En todos se realizó encuesta sobre antecedentes demográficos, FR cardiovascular, y medición de PA, IMC, cintura, y perfil lipídico, glicemia y proteína C-reactiva ultrasensible (ePCR) en ayuno. Para diagnóstico de SMET se usó NCEP ATPIII (2001), y para inflamación, ePCR> 2 mg/L (valor de corte de > riesgo porAHA). El CIMT se midió en carótida común derecha e izquierda con software MATH®. Resultados: Se incluyeron en el análisis 999 sujetos (508 hombres), edad promedio 43.8 +/- 11 años. La prevalencia de HTA fue 30 por ciento, dislipidemia 68 por ciento, tabaquismo 47 por ciento, y SMET 24 por ciento. El CIMT medio promedio fue 0.61 +/- 0.1 mm y la ePCR promedio 2.22 mg/L. La modificación del CIMT medio (mm) según número de FR (edad>45/55 hombre/mujer, diabetes, HTA, colesterol total > 200, HDL < 40/50, tabaquismo e historia familiar), fue la siguiente: 0 FR= 0.55 +/- 0.08; 1-2 FR= 0.59 +/- 0.091; > 3 FR= 0.67 +/- 0.12 (p < 0.0001). Asimismo, el CIMT aumentó según el puntaje de Framingham: < 5 por ciento = 0.58 +/- 0.09; 5-10 por ciento= 0.66 +/- 0.11; > 10-20 por ciento= 0.68 +/- 0.11; >20 por ciento > o = 0.76 +/- 0.14 (p < 0.0001). El CIMT fue significativamente mayor en los sujetos con SMET, y se incrementa en forma significativa cuando se adiciona ePCR>2 mg/L. En el modelo de regresión múltiple, el CIMT se asocia en forma conjunta a Framingham (p < 0.0001) y SMET+ePCR>2...

Carotid intima-media thickness (CIMT) is a marker for cerebral and coronary ischemic events. Normal values for CIMT in Chile have been published but the relation of CIMT to level of risk factors (RF) is unknown. Aim. To analyze the relation of CIMT to level of traditional RF and the presence of metabolic syndrome (MS), with or without inflammation. Methods. Males and females living in Santiago, Chile, with no prior history of ischemic events, of a low, medium or high socio-economic level, were studied. Demographic data, and presence of RF were obtained. Blood pressure, BMI, waist, blood lipids, blood glucose and US-CRP were measured in the fasting state. The presence of MS was defined by the NCEP-ATP III (2001) criteria. Inflammation was defined as US-CRP >2mg/L (the cut off point for increased risk, according to the AHA). CIMT was measure in both carotid arteries using the MATH® software. Results. 999 subjects (508 males), aged 43 +/- 11 years old. The prevalence of hypertension (HT) was 30 percent, dyslipidemia 68 percent, tobacco use 41 percent and MS 24 percent. Mean CIMT was 0.61 +/- 0.1 mm and US-PCR was 2.22 mg/L. CIMT according to number of RF - age > 45/55 (male/female), diabetes, HT, total cholesterol > 200 mg/dl, HDL < 40/50 mg/dl, tobacco use and family history- were: 0 RF: 0.55 +/- 0.08; 1-2 RF: 0.59 +/- 0.091; >3 RF: 0.67 +/- 0.12 (p < 0.0001). CIMT according to Framingham scores was: < 5 percent: 0.58 +/- 0.09; 5 - 10 percent: 0.66 +/- 0.11; 10 - 20 percent: 0.68 +/- 0.11 and > 20 percent: 0.76 +/- 0.14 (p < 0.0001). CIMT was significantly greater in subjects with MS and more in the group with US-PCR > 2mg/L. In multiple regression analysis, CIMT was jointly associated to Framingham score (p < 0.0001) and presence of MS + US-PCR >2 mg/L (p=0.01) (r2=0.19 for the model). Conclusion. CIMT increases in relation to traditional RF load and the presence of MS. An increased atherosclerotic risk in subjects with MS+inflammation (US-PCR > 2 mg/L)...

Relación entre capacidad aeróbica máxima, componentes del síndrome metabólico e inflamación subclínica en sujetos estudiados en una Unidad de Cardiología Preventiva Ambulatoria / Relationship between aerobic capacity, metabolic syndrome components and chronic subclinical inflammatory markers in subjects attending a primary prevention clinic

Antecedentes: El síndrome metabólico (SMET) está presente en uno de cada 4 sujetos en Chile. Existiría una relación directa entre el SMET y la inflamación subclínica crónica determinada por proteína C-reactiva ultrasensible (PCRus). La actividad física se asocia a un aumento en la sensibilidad a insulina y menor desarrollo de SMET y diabetes. Existe escasa información sobre la relación entre la actividad física, SMET y PCRus. Objetivos: Determinar la relación entre la capacidad aeróbica determinada por ergometría, los factores de riesgo del SMET y la inflamación subclínica en una población presuntamente sana. Métodos: Estudio prospectivo en una población estudiada en una unidad de cardiología preventiva ambulatoria entre noviembre de 2003 y agosto de 2005. En todos los sujetos se efectuó una evaluación sobre factores de riesgo cardiovascular, medición de IMC, cintura, cadera, perfil de lípidos, glicemia de ayuno, PCRus (desde marzo 2005), presión arterial sistólica y diastólica (PAS-PAD) en 2 días alternos, y test de esfuerzo máximo (frecuencia cardíaca alcanzada > 85 por ciento de la teórica o percepción de esfuerzo en escala de Borg > 17) medido en equivalentes metabólicos (METS). Resultados: Se estudiaron 1587 individuos (1016 hombres) de edad promedio 52 +/- 12 años. La mayoría (67 por ciento) tenía sobrepeso u obesidad, y un 25 por ciento cumplía con los criterios (ATP III) para SMET. Se demostró una correlación significativa entre la actividad física medida en METS con la edad (r= 0.57, p<0.001) y con algunos de los componentes del SMET como glicemia (r= - 0.16, p<0.001); HDL(r= -0.09, p<0.001) y PAS (r= -0.3, p<0.001). En la siguiente tabla se muestra la distribución de componentes del SMET y PCRus según cuartiles de actividad física: Los niveles de PCRus fueron significativamente menores en sujetos con SMET (+) y con mayor capacidad aeróbica versus los con menor...

Background: The metabolic syndrome (MS) is present in 1 out of 4 subjects in Chile. A direct relation between the presence of metabolic syndrome and chronic subclinical inflammation as revealed by ultra sensitive C reactive protein (CRP) has been postulated. Physical activity is associated with an increased insulin sensitivity and a lower incidence of MS and diabetes. There is limited information about the relation between physical activity, the MS and subclinical inflammation in healthy subjects. Aim: To determine the relationship between aerobic capacity measured by treadmill exercise testing, the components of MS and subclinical inflammation in a presumably healthy population. Methods: A prospective study was carried out in a primary prevention cardiac unit between november 2003 and august 2005. Risk factors for cardiovascular disease were evaluated. BMI, waist and hip circumference, fasting glucose, CRP, systolic and diastolic blood pressure were measured. METS were determined through an exercise test set to achieve 85 percent of maximal heart rate or a level 17 of Borg's perceived effort. Results: 1587 subjects (1016 males) with mean age 52 years (SD 12) were studied. Most were overweight or obese: 25 percent met ATP III criteria for MS. METS were significantly correlated to age (r 0.57, p<0.001), fasting glucose level (r -0.16, p<0.001), HDL (r -0.09, p<0.001) and systolic BP (r -0.3, p<0.001). The distribution of mean values for MS components and CRP according to quartiles of METS is shown below: Conclusion: A strong association between aerobic capacity, MS factors and subclinical inflammation is shown in this study. It is postulated that exercise leading to improvement in aerobic capacity may have a beneficial effect upon chronic inflammation and cardiovascular risk.

Correlación entre factor de crecimiento insulínico tipo 1 (IGF-1), citoquinas proinflamatorias y activación neurohumoral en pacientes con isuficiencia cardíaca crónica avanzada / Correlation of insulin like growth factor (IGF-1), cytokines and neurohumoral activation in patiens with advanced congestive heart failure

Hemos demostrado previamente que la actividad del eje hormona de crecimiento (GH) y su mediador activo, el factor de crecimiento insulínico tipo 1 (IGF-1) se encuentra disminuido en pacientes (pts) con insuficiencia cardíaca crónica (ICC). Por otra parte, se ha reportado que otras moléculas biológicamente activas, las citoquinas, se encuentran aumentadas en pts con ICC avanzada. Es posible que estas alteraciones neurohumorales contribuyan al compromiso del estado general y a un mayor deterioro de la función ventricular izquierda en estos pts. El objetivo del presente estudio fue evaluar si existe correlación entre la actividad del eje GH-IGF- 1, niveles de citoquinas proinflamatorias como el factor de necrosis tumoral (TNF) e interleuquína 6 (IL-6), y noradrenalina en reposo y ejercicio (NAD rep-NAD ex) en pts con ICC avanzada. Se estudiaron en forma prospectiva 10 pts con ICC por cardiopatía dilatada o isquémica. Se determinó consumo de 02 máximo (V02 max), Fracción de eyección (FE) radiolisotópica y niveles sóricos de GH e IGF- 1 (técnica IRMA), catecolaminas plasmáticas en reposo y en ejercicio máximo (NAD replex) (técnica RIA) y TNF e IL-6 (técnica ELISA). El análisis estadístico se realizó mediante regresión lineal Los resultados se expresaron como promedio k desviación estándar. La FE promedio del grupo fue de 17 por ciento ñ 4 por ciento y el V02 máx promedio de 15,9 ñ 3,9 ml/kg/min. LA GH fue de 3,4 ñ 4,55 ng/ml; IGF- 1 de 177,1 ñ 69,4 ng/ml, NAD rep 612,9 ñ 407,3 pg/ml y NAD ex de 4250 ñ 2620 pg/ml. El TNF del grupo fue de 1,2 ñ 1,4 pg/ml y la IL-6 de 4,4 ñ 3,55 pg/ml. Hubo correlación estadísticamente significativa entre el Logaritmo (log) IGF- 1 y Log NADex (r=-0, 66 p=0, 03 ), Log IGF- 1 y Log TNF(r=-0, 65p=0, 04)e IL-6 y NADex (r=0, 781 p=0,0l). Nuestro estudio demuestra por primera vez una correlación entre el aumento de la actividad simpática (NAD ex) y la menor actividad del eje GH-IGF- 1 en pts con ICC avanzada. Al mismo tiempo, confirma que también existe una correlación entre la actividad simpática exagerada y el aumento de citoquinas proinflamatorias en pts con ICC avanzada