Successful Transcatheter Device Closure of Huge Left Ventricular Pseudoaneurysms utilizing CT-Fluoroscopy Fusion technology - A Case Series of two different cases
This case series reports the successful transcatheter device closure of two distinct left ventricular pseudoaneurysms in high-risk patients using CT-fluoroscopy fusion technology (Heart Navigator) to guide procedural planning, vascular access selection, and precise device deployment.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
The human heart is a resilient organ, but when its muscular wall tears, the consequences can be catastrophic. Sometimes, instead of a complete rupture that leads to immediate bleeding, the heart's outer lining, a tough membrane called the pericardium, holds the broken tissue together. This creates a false pocket, known as a pseudoaneurysm, which is essentially a balloon of blood pressing against the heart's exterior. Unlike a true aneurysm, which has a wall made of heart muscle, this false sac is held together only by scar tissue and the pericardium, making it incredibly fragile. Without intervention, these pockets are prone to bursting, a event that carries a very high risk of death. For decades, the only way to fix this was open-heart surgery, a major operation that carries its own significant risks, especially for patients who are already weak or have undergone previous heart procedures. In recent years, doctors have begun exploring less invasive methods to seal these leaks from the inside using catheters, but doing so requires a level of precision that is difficult to achieve when the heart is beating and the anatomy is distorted.
Two researchers at Apollo Children's Hospital in India recently documented a new approach to solving this problem by combining two different types of medical imaging. They treated two patients with large, dangerous pseudoaneurysms using a technology that merges a three-dimensional map from a CT scan with live X-ray video. This fusion allows the medical team to see the internal structure of the heart in real-time, overlaying a detailed 3D model onto the moving X-ray screen. In one case, a fifteen-year-old girl who had survived two previous heart surgeries faced a massive leak near her mitral valve. Standard X-rays could not show a safe path for a catheter to reach the hole. However, the fused imaging revealed that the only safe route was through the very tip of the heart, a path that would have been impossible to plan without the 3D map. The team successfully guided a small, umbrella-like device through this route to seal the leak. In a second case, a seventy-four-year-old man with a large leak on the front wall of his heart was treated using a less invasive route through the groin. The same imaging technology confirmed that a clear path existed through the main artery, allowing the doctors to deploy a similar device to close the hole without damaging the heart's valves.
The success of these two procedures highlights how advanced imaging can change the landscape of heart repair. The doctors used a system that takes a static CT scan of the heart and automatically builds a digital model, which can then be manually adjusted to ensure accuracy. This model is then fused with live fluoroscopy, the continuous X-ray video used during procedures. In the first patient, this technology was critical because it showed that the usual approach through the aorta was blocked by the patient's previous mechanical valve and the location of the leak. The 3D map guided the team to a hybrid approach, where they made a small incision at the tip of the heart to insert the device. In the second patient, the same technology provided the confidence to use a standard approach through the leg, confirming that the device would not interfere with the mitral valve. Both patients recovered quickly, with follow-up scans showing that the leaks were completely sealed and the devices were stable.
This work suggests that the use of CT-fluoroscopy fusion is a reliable tool for planning and performing these complex closures. The authors note that while this technology is already used for other heart valve procedures, its application to pseudoaneurysms had not been reported before. The imaging helped the team choose the correct access route, select the right size of the closing device, and verify the final result in real-time. The study does not claim that this method is perfect for every case, nor does it suggest that surgery is no longer needed, but it demonstrates that for high-risk patients, this guided approach offers a viable alternative. By turning a complex, three-dimensional problem into a clear, visual guide, the technology allows doctors to navigate the delicate structures of the heart with greater certainty, turning a potentially fatal condition into a manageable one.
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