Table 2:
Open in new tab

Proposed classification for the root, focusing on normal and large sizes

General descriptionLimitsProposed name

  • Normal.

  • Consensus that lies between ± 2 SD.

Up to mean + 1 SDNormal root
Mean + 1 SD/mean + 2 SDNear normal root

  • Dilated/Aneurysmal.

  • Blurred boundaries, but over mean + 2 SD.

Mean + 2 SD/mean + 3 SDMild marfanoid dilatation
Mean + 3 SD/mean + 4 SDMarfanoid dilatation
Mean + 4 SD/mean + 5 SDMarfanoid aneurysm
>+5 SDLarge marfanoid aneurysm
General descriptionLimitsProposed name

  • Normal.

  • Consensus that lies between ± 2 SD.

Up to mean + 1 SDNormal root
Mean + 1 SD/mean + 2 SDNear normal root

  • Dilated/Aneurysmal.

  • Blurred boundaries, but over mean + 2 SD.

Mean + 2 SD/mean + 3 SDMild marfanoid dilatation
Mean + 3 SD/mean + 4 SDMarfanoid dilatation
Mean + 4 SD/mean + 5 SDMarfanoid aneurysm
>+5 SDLarge marfanoid aneurysm

Sizes are delimited by SAS-based z scores. As demonstrated later in text, marfanoid aneurysms (over mean + 4 SD) are at increased risk of adverse events.

SAS: sex–age–body surface area; SD: standard deviation.

Table 2:
Open in new tab

Proposed classification for the root, focusing on normal and large sizes

General descriptionLimitsProposed name

  • Normal.

  • Consensus that lies between ± 2 SD.

Up to mean + 1 SDNormal root
Mean + 1 SD/mean + 2 SDNear normal root

  • Dilated/Aneurysmal.

  • Blurred boundaries, but over mean + 2 SD.

Mean + 2 SD/mean + 3 SDMild marfanoid dilatation
Mean + 3 SD/mean + 4 SDMarfanoid dilatation
Mean + 4 SD/mean + 5 SDMarfanoid aneurysm
>+5 SDLarge marfanoid aneurysm
General descriptionLimitsProposed name

  • Normal.

  • Consensus that lies between ± 2 SD.

Up to mean + 1 SDNormal root
Mean + 1 SD/mean + 2 SDNear normal root

  • Dilated/Aneurysmal.

  • Blurred boundaries, but over mean + 2 SD.

Mean + 2 SD/mean + 3 SDMild marfanoid dilatation
Mean + 3 SD/mean + 4 SDMarfanoid dilatation
Mean + 4 SD/mean + 5 SDMarfanoid aneurysm
>+5 SDLarge marfanoid aneurysm

Sizes are delimited by SAS-based z scores. As demonstrated later in text, marfanoid aneurysms (over mean + 4 SD) are at increased risk of adverse events.

SAS: sex–age–body surface area; SD: standard deviation.

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