IJCS | Volume 31, Nº2, March / April 2018

DOI: 10.5935/2359-4802.20170098 90 International Journal of Cardiovascular Sciences. 2018;31(2)90-96 ORIGINAL ARTICLE Mailing Address: João Luis Barbosa Av: Embaixador Abelardo Bueno, 3250/BL 2/603. Postal Code: 22775040, Barra da Tijuca, Rio de Janeiro, RJ – Brazil. E-mail: joaoluis@cardiol.br , jlmedunirio@yahoo.com.br Impact of Risk Factors for Coronary Artery Disease onHospital Costs of Patients Undergoing Myocardial Revascularization Surgery in the BrazilianUnifiedHealth System (SUS) João Luis Barbosa, 1 Clarissa Antunes Thiers, 1 Carlos Felipe dos Santos Cunha, 2 Juliana Moutella, 2 Bernardo Rangel Tura, 1 Giulia Principe Orsi, 2 Karen Feldman, 2 Nathália Rodrigues da Silva, 2 Luiz Felipe Faria 3 Instituto Nacional de Cardiologia (INC); 1 Universidade Estácio de Sá; 2 Universidade Federal Fluminense (UFF), 3 Rio de Janeiro, RJ – Brazil Manuscript received May 31, 2016, revised manuscript July 22, 2017, accepted July 31, 2017 Abstract Background: Cardiovascular diseases are a major cause of mortality and morbidity. Myocardial revascularization surgery may be indicated for the relief of symptoms and to reduce mortality. However, surgery is a costly procedure and the impact of the number of cardiovascular risk factors on the cost of the procedure has not been established. Objectives: To identify the impact of risk factors for coronary artery disease on myocardial revascularization surgery cost. Methods: We selected 239 patients undergoing myocardial revascularization surgery at the National Institute of Cardiology in the period from 01 January to 31 December 2013. We included patients aged over 30 years, with indication for the procedure. Patients undergoing combined procedures were excluded. Results: Seven patients had only one risk factor, 32 patients had two risk factors, 75 patients had 3 risk factors, 78 patients had four risk factors, 36 patients had 5 risk factors and 11 patients presented 6 risk factors. The total costs, on average, was R$ 14,143.22 in the group with 1 risk factor, R$ 18,380.40 in the group with 2 risk factors, R$ 21,229.51 in the group with 3 risk factors, R$ 24,620.86 in the group with 4 risk factors, R$ 21,337.92 in the group with 5 risk factors and R$ 36,098,35 in the group with 6 risk factors (p = 0.441). Conclusion: This study demonstrates that, in a public referral center for highly complex cardiology procedures, there was no significant correlation between the number of cardiovascular risk factors and hospitalization costs. (Int J Cardiovasc Sci. 2018;31(2)90-96) Keywords: Coronary Artery Disease; Myocardial Revascularization / economics; Risk Factors; Hospital Costs; Unified Health System. Introduction Cardiovascular diseases are a major cause of mortality and morbidity. 1 In a national context, the prevalence of ischemic heart disease has increased in the past years, leading to an increase in hospitalizations and health costs. 2 Myocardial revascularizationsurgery (MRS) is anexpensive therapy, indicated to selected patients. Clinical conditions of patients prior to MRS can have an important influence on the procedure costs. However, there is little information regarding the impact of cardiovascular risk factors related to the development of coronary artery disease (CAD) on MRS costs at a national level. The aim of this study was to investigate the impact of risk factors on MRS costs in the Brazilian Unified Health System (SUS). Methods This was an observational, prospective, unicenter study. A total of 239 consecutive patients who had undergone MRS at the National Institute of Cardiology were selected. This is a public tertiary hospital that serves SUS users referred for high complexity cardiology procedures from 01 January 2013 to 31 December 2013.