This cardiovascular perfusion case involves a sixty-two-year-old female patient who presented to her primary care physician with a long term history of worsening fatigue, shortness of breath and palpitations. An echocardiogram revealed mitral valve stenosis. The patient was initially managed conservatively with anticoagulant therapy and diuretics which alleviated many of her symptoms for a period of time. The patient later developed atrial fibrillation and was started on antiarrhythmics. The patient’s condition continued to decline and valve replacement surgery was deemed to be the best course of action. The surgery to replace the valve went ahead as planned without incident. The patient had a femoral artery cannula inserted for monitoring of vitals. Post-operatively she suffered a bleed at the site of the femoral artery cannula that went undiagnosed for several hours due to insufficient monitoring by the medical staff in charge of her recovery. By the time the hemorrhage was detected, irreversible damage had already occurred. The patient had a massive intraperitoneal bleed as a result of the femoral artery cannula. The patient was transferred to the ICU and remained in a critical condition for several weeks. She died 26 days after the procedure as a result of the post-operative complications.