Beating pulmonary vein sign during catheter ablation.

The beating of a pulmonary vein during cardiac catheterization is a rare phenomenon caused by the heart beating through the pericardial effusion when a cardiac tamponade occurs. This "beating pulmonary vein" sign is useful for early detection of a tamponade before circulatory collapse occurs.

Abdominal aortic aneurysm mimicking the cause of gastric obstruction.

A case of abdominal aortic aneurysm appeared to be compression of the antrum of the stomach and was suspected of causing a gastric obstruction. However, an upper gastrointestinal endoscopy to rule out an obstruction by a tumor revealed a gastric tumor, thus avoiding unnecessary intervention, such as open surgery.