MediAI

  Postcatheterization Femoral Pseudoaneurysm: From the Yin-Yang Sign to Ultrasound-Guided Thrombin Injection Introduction: The Complication Nobody Wants to Miss A 76-year-old man underwent a successful coronary intervention. Twenty-four hours later, he complained of increasing right groin pain. The nursing staff noticed a progressively enlarging hematoma and a pulsatile mass. A vascular ultrasound was immediately performed. Within seconds, the diagnosis became clear. The lesion demonstrated a striking red-and-blue swirling appearance on color Doppler imaging—the famous Yin-Yang sign . The patient had developed a postcatheterization femoral pseudoaneurysm (PSA) . Although often considered an uncommon complication, femoral pseudoaneurysm remains one of the most important vascular complications following: Coronary angiography Percutaneous coronary intervention (PCI) Peripheral arterial intervention Endovascular aneurysm repair (EVAR) Transcatheter aortic valve implantation (...

Iatrogenic Arteriovenous Fistula After Femoral Access: The CTA Findings Every Radiologist Must Recognize Introduction A 65-year-old man presented with persistent right groin pain. At first glance, the symptom appeared nonspecific. However, recent cardiovascular intervention dramatically altered the differential diagnosis. The patient had undergone a heart transplant and subsequently an endomyocardial biopsy requiring femoral vascular access. Shortly afterward, groin pain developed. CTA was performed to investigate possible vascular complications. This scenario represents a growing challenge in modern medicine. As the number of catheter-based cardiovascular procedures continues to increase worldwide, radiologists are increasingly encountering access-site complications, including: Hematoma Pseudoaneurysm Arterial dissection Active hemorrhage Arteriovenous fistula Among these, iatrogenic arteriovenous fistula (AVF) remains uncommon but clinically important because delayed diagnosis may le...