This is as opposed to the regular triangle choke, which denotes a chokehold using the legs, albeit with a similar mechanism of strangulation against the opponent's own shoulder.
The time it takes for the opponent to be rendered unconscious does vary depending on the configuration of the grip and position, although the standard arm triangle is one of the fastest at 7.2 seconds.
The performer then attempts to pin the opponent onto the trapped shoulder so as to better interrupt the flow of blood, all the while applying pressure with the grasped biceps.
The creator of this choke is unknown, although many sources point towards UFC veteran Milton Vieira.
Vieira's friend, Kid Pelligro, calling this position "Brabo choke" deriving from Vieira's email address "leobrabo@...." which fit the actual meaning of the word "brabo" in Portuguese of angry, aggressive or toughness.