We report a rare case of interventricular septal dissecting aneurysm, that resulting from ruptured sinus of Valsalva aneurysm and paravalvular aortic root pseudoaneurysm. A 60-year-old man presented with chest pain and palpitation, the diagnosis was confirmed using multimodality imaging, including transthoracic echocardiography, computer tomography angiogram and coronary angiogram. The patient underwent the modified Cabrol procedure, repaired ruptured sinus of Valsalva aneurysm and closured the communication of the pseudoaneurysm in the department of cardiac surgery. In this case report, we provide information for clinicians diagnostic thought, and highlight the role of multimodality cardiac imaging.