* Represents the height of the LA roof from the point where the LAPW and
esophagus make contact.
AF, atrial fibrillation; GH, gastric hypomotility; LA, left atrial;
LAPW, left atrial posterior wall; LIPV, left inferior pulmonary vein;
LSPV, left superior pulmonary vein; RIPV, right inferior pulmonary vein;
RSPV, right superior pulmonary vein.