“…Despite its unfamiliar etiology, the hematomas origin might be spontaneous or iatrogenic, which could be secondary to endovascular trauma or the use of anticoagulation drugs during the procedure. Risk factors predisposing to retroperitoneal haemorrhage after percutaneous transfemoral cardiac intervention are the following: the female sex, low platelet count, sheath removal protocol, the use of hydrophilic guide wire [ 7 ] and post-procedure anticoagulation, presenting the greatest risk [ 8 ].…”