Aims: The Coronary Slow Flow Phenomenon (CSFP) is a syndrome which according to normal or near normal angiography findings is characterized by delayed progression of the injected contrast medium through the coronary vessels. The causes of this disease are unknown. Therefore, the identification of the disease’s pathogen, an effective cure and the long-term prognosis of these patients is still in need of more research. This research attempts to analyze and compare the systolic and diastolic function of the left and right ventricle in people affected by primary Slow Coronary Flow and Normal Coronary Flow. Methods and Results: This case-control study was conducted with the participation of 44 patients undergoing coronary angiography in Qazvin’s Bu Ali Sina Hospital in 2017. The patients were divided in two groups of primary Slow Coronary Flow (33 people) and Normal Coronary Flow (11 people) and the systolic and diastolic function of the left ventricle and the systolic function of the right ventricle was analyzed and compared between the two groups. The frequency of left ventricular systolic and diastolic dysfunction and right ventricular systolic dysfunction was similar and no significant statistical difference was seen between the two groups. Conclusion: In this research the frequency of left ventricular systolic and diastolic dysfunction and right ventricular systolic dysfunction was similar and no significant statistical difference was seen between the two primary Slow Coronary Flow and Normal Coronary Flow groups. Keywords: left ventricular systolic function, left ventricular diastolic function, right ventricular systolic function, Coronary Slow Flow