This is a case of left ventricular pseudoaneurysm with intratumoral thrombus resulting from cardiac radiofrequency surgery. Due to the small size of the tumor, the patient recovered after half a year. This paper introduces in detail the whole process of echocardiography follow-up of pseudo ventricular aneurysm, and emphasizes that bedside echocardiography should be carried out actively when patients have uncomfortable symptoms during the operation.