Thumb-to-palm test may signal increased aortic aneurysm risk

A simple self-diagnostic method known as the “thumb-to-palm test” may indicate an increased risk of aortic aneurysm. According to Dr. Joe Whittington, an emergency physician, the test involves attempting to extend the thumb as far as possible toward the palm. A positive result occurs if the thumb extends beyond the palm, suggesting overly elastic connective tissues.

Research published in the American Journal of Cardiology involving 305 cardiac surgery patients found that approximately 60% of those with a known aneurysm had a positive result in this test. Highly elastic connective tissue can affect the walls of the aorta, making it more vulnerable to dilation or rupture.

While the test serves as a potential warning sign, medical professionals emphasize it is not a cause for panic but rather a tool to discuss with a physician. Such flexibility may be linked to connective tissue disorders, including Marfan syndrome—which can increase aneurysm risk by up to 250 times—and Ehlers-Danlos syndrome (EDS).