According to researches, the most common diseases of unexpected death causes are related to heart. The one of basic reasons of heart diseases is congestion of heart vessel. To detect these failures, various solutions are produced and these solutions are continued. With the proposed study, the congestion of heart vessel related to heart disease is modelled on rectangular microstrip patch antenna and evaluations of electromagnetic field values are tried in situations while there is congestion and not congestion. In modelling, permittivity values of heart vessel and fat tissues are used, by selecting 2.45 GHz as operating frequency and FR-4 as substrate, simulations are realized in High Frequency Structural Simulator(HFSS). From obtained results, it has been shown that the congestion of heart vessel can be detected with electromagnetic data.