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In this report, we present a case of interventricular septal dissection (IVSD) following inferior wall myocardial infarction (MI) in a 64-year-old patient; the patient ultimately recovered after prompt resuscitation and intervention, despite the high mortality associated with these cases.  A 64-year-old male with a history of hypertension and obesity was brought to the hospital following an episode of syncope at home. He had been experiencing chest tightness over the past few days prior to the admission. On physical exam, he had a heart rate of 72 beats per minute and blood pressure of 73/52 mmHg. His electrocardiogram revealed ST-segment elevations in leads II, III, and aVF. Emergent coronary angiography revealed 100% occlusion of the right coronary artery (RCA) with no collateral supply and 95% stenosis of the left anterior descending (LAD) artery. Aspiration thrombectomy and balloon angioplasty and subsequent stenting of the RCA were performed. Transthoracic echocardiogram with color Doppler was performed, which confirmed the presence of a defect in the septum. Color Doppler demonstrated a clear jet entering the ventricular septum from the left ventricle (LV), with the jet traversing the entire length of the septum through a dissection and entering into the right ventricle (RV), consistent with complete IVSD. The patient subsequently underwent a successful bovine pericardial patch repair of the ventricular septum.  IVSD is a rare anomaly of the IVS. An echocardiogram is a useful tool to establish the diagnosis. The mortality rate after ventricular septal rupture remains high. Fortunately, our patient had interventricular dissection without rupture. Prompt surgical repair remains the choice of treatment for this condition.

Complete Dissection of the Interventricular Septum Following Myocardial Infarction