If you are like me, then you have an ascending aortic aneurysm associated with bicuspid aortic valve and are potentially at risk for aortic dissection. This may sound fun and interesting, but it’s actually a health risk. Turns out you need to get the darn thing replaced. The tricky thing for cardiologists has been determining what size aneurysm should be an indicator for elective surgery. Apparently, based on this study (from Circulation), there is a neat little calculation that can be used to make that determination. What you do is compare your aneurysm size relative to body size, with the value of 10cm/m^2 being the indicator. But don’t take my word for it:
…adults with small body size should undergo earlier intervention because a higher ratio of aortic size to body size is a predictor of increased risk.85,118,119Calculating the ratio of aortic area in square centimeters to body height in meters, using a ratio of 10 as an indicator of increased risk, has been proposed.85,119 The value of 10 was derived from the mean ratio minus 1 SD at time of dissection in BAV patients; it is a conservative threshold that would theoretically precede 95% of dissections. Increasing “aortic size index,” a ratio of aortic diameter in centimeters to body surface area in square meters, was correlated with dissection, rupture, and death in 1 study; an index ≥4.25 cm/m2 indicated high risk (20% per year).118 The aortic size ratios and indexes should be used as rough guidelines until validated by further studies. Measurement of aortic elasticity by echocardiography may aid with risk stratification in the future; prospective studies are needed.66Genomewide association studies may identify high-risk genotypes that will aid with risk stratification as well.
I found this calculator on the Valley Health System’s website so that the layperson can simply enter their aneurysm size, height, and weight to obtain their suggestive results. Turns out I am still just under the recommended elective surgery point, which is great news because the point itself is already conservative. To see my results, just type in my data: height: 5’9″ weight: 158lb aneurysm: 4.6cm