Abstract The aim of the current study was to determine the effectiveness of nutritional guidance based on estimated daily salt intake (voluntary urine) and identification of dietary habit issues to prevent ischemic heart disease in patients with cancer. Potential subjects were patients who were suspected of consuming too much salt who were seen by the Division of Cardiology of the Shizuoka Cancer Center between April 2018 and March 2019. Subjects were patients who underwent for the first time coronary catheterization (Coronary angiography: CAG) and who received nutritional guidance on the day of their next visit. The nutritional guidance method did not use salinity measurement, but was instructed to improve the use frequency of foods that contained salt in the dietary habits.Improvement (a decrease) in estimated daily salt intake was divided into areas where salt intake needed to be controlled, i.e. ingredients, food preparation, and meals, and the frequency with which an area improved was compared. The 18 patients (14 men) had a mean age of 74 (range: 50-85) years. Estimated daily salt intake improved in 11 patients. Ingredients (one area where salt intake needed to be controlled; e.g, bread, noodle, and traditional foods, etc.) deceased relatively significantly in patients whose salt intake improved in comparison to patients whose salt intake did not improve (p<0.05). Estimated daily salt intake was correlated with changes in triglyceride levels and skeletal muscle mass (r =－0.57, p<0.01; r =0.53, p<0.05). There were no differences between the two groups in terms of the stage of cancer and the affected site in the digestive system (p =0.56,p =0.63). Nutritional guidance related to dietary habit that does not involve measuring sodium levels may be effective in preventing ischemic heart disease in patients with cancer. This article is an effort to support the motivation of patients who are aiming to treat without being separated from cancer stage from the perspective of a register dietitian and propose a platform formation for a new nutritional guidance method in light of adherence. Keywords: ischemic heart disease, CAG, dietary habit, estimated daily salt intake (voluntary urine), ingredient

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