Femoral pseudoaneurysms complicating cardiac catheterization results in significant morbidity. The treatment options for symptomatic and complicated aneurysms are ultrasound compression, thrombin injection and surgical repair. The authors review the etiology, pathology, diagnosis and treatment modalities for post-cath femoral pseudoaneurysms. They also share their experience in the new treatment modality of para-aneurysmal saline injection. This monograph should be useful for interventional cardiologists, vascular medicine specialists and interventional neuroradiologists who would like a comprehensive review of femoral pseudoaneurysms.