* **clinical**
    * Pseudo-severe AS
    * low flow low gradient AS
    * evidence base for CPET
  * **statistics**
    * [[https://en.wikipedia.org/wiki/Gower%27s_distance | Gower's distance]]
    * [[https://en.wikipedia.org/wiki/Silhouette_(clustering) | silhouette (clustering)]]
    * Partitioning Around Medoids (PAM)