ABSTRACT
BACKGROUND AND OBJECTIVES: The relationship between short-term hypothyroidism due to levothyroxine (LT4) withdrawal for radioactive iodine (RI) therapy in patients with differentiated thyroid cancer (DTC) and risk of cardiovascular disease is not clear. In this study, we evaluated the impact of short-term overt hypothyroidism on lipid profiles and cardiovascular parameters in patients with DTC. MATERIALS AND METHODS: We recruited 195 patients with DTC who were preparing RI therapy from March 2008 to February 2012. We analyzed the effect of thyroid stimulating hormone (TSH) level on the clinical, biochemical, and cardiovascular risk markers at the end of LT4 withdrawal protocol (P2). RESULTS: After LT4 withdrawal (P2), TSH and total cholesterol (TC) levels were significantly increased (p121 microIU/mL), all values did not have a statistical significant meaning except Apo A1. CONCLUSION: Short-term hypothyroidism induced worsening of lipid metabolic parameters, but not enough to induce the cardiovascular risk in patients with thyroid cancer.
Subject(s)
Humans , Alanine Transaminase , Apolipoprotein A-I , Apolipoproteins , Apolipoproteins B , Aspartate Aminotransferases , Bilirubin , Body Mass Index , C-Reactive Protein , Cardiovascular Diseases , Cholesterol , Cohort Studies , Cystatin C , Diabetes Mellitus , Homocysteine , Hypertension , Hypothyroidism , Iodine , Lipoprotein(a) , Reference Values , Thyroid Neoplasms , Thyrotropin , Thyroxine , Triglycerides , Uric AcidABSTRACT
Introducción: El síndrome metabólico (SM) es factor de riesgo para mortalidad por enfermedad coronaria y diabetes mellitus. Se han propuesto nuevos marcadores de riesgo cardiovascular (RCV), con mejor capacidad pronóstica en la toma de medidas preventivas para disminuir la aparición o severidad de sus consecuencias. Objetivos: Establecer la prevalencia de SM y determinar el comportamiento de los factores de riesgo cardiovascular tradicionales y no convencionales entre hombres y mujeres de Bucaramanga, Colombia. Metodología: GÉNESIS es un estudio de cohorte prospectivo con evaluación en 2005 y 2010. Para la segunda fase, todos los participantes contestaron una encuesta semiestructurada, recibieron evaluación clínica, de presión arterial (PA) y parámetros antropométricos, así como toma de sangre periférica en ayunas para medición de coleste-rol, HDL, triglicéridos, glicemia, PCR, IL- 6, Apo A-I y Apo B. Resultados: Para la segunda fase se evaluaron 66 empleados. Se encontró una prevalencia de SM del 18.2%. La población masculina presentó los mayores valores de PA, glucemia, triglicéridos, Apo B y relación Apo B/Apo A-I, comparado con las mujeres. En el estudio de seguimiento se evaluaron 44 personas en dos momentos (2005 y 2010), donde la población femenina evidenció un aumento significativo del PA, niveles de colesterol, HDL y glucemia, así como descenso en los de PCR comparado con los hombres. Conclusión: El reconocimiento de los factores de riesgo tradicionales y no convencionales, y las diferencias de los mismos entre los géneros ayudaría a optimizar la estratificación del RCV y a futuro una mayor prevención de las enfermedades cardiovasculares.
Background: The metabolic syndrome (MS) is a risk factor for coronary heart disease and diabetes mellitus mortality. New cardiovascular risk markers have been proposed with better prognostic ability for taking preventive measures to decrease the occurrence or severity of their consequences. Objectives: To establish the prevalence of MS and to determine the behavior of traditional and no traditional cardiovascular risk factors of men and women from Bucaramanga, Colombia. Methodology: GENESIS is a prospective cohort study in 2005 and 2010 assessment. For the second phase, all participants completed a semistructured questionnaire, received clinical evaluation for blood pressure and anthropometric parameters and peripheral blood sampling for measurement of fasting glucose, cholesterol, HDL, triglycerides, CRP, IL-6, Apo AI and Apo B. Results: 66 employees were evaluated for second phase. The prevalence of MS was 18.2%. Among them, the male population had the highest values of waist circumference, glucose, triglycerides, Apo B and Apo B/Apo AI, compared with women. In Follow-up study, 44 people were assessed on two occasions (2005 and 2010); female population showed a significant increase in waist circumference, cholesterol, HDL and blood glucose levels, and decrease in CRP compared with men. Conclusion: The recognition of traditional and non-conventional risk factors, and the differences between genders would help to optimize cardiovascular risk stratification and therefore better prevention of CVD in the future.