Johann Sebastian Bach composed the church cantata Mein Herze schwimmt im Blut BWV 199 in Weimar between 1712 and 1713, and performed it on the eleventh Sunday after Trinity, 12 August 1714. It is a solo cantata for soprano.

The cantatas composed by Johann Sebastian Bach, known as Bach cantatas, are a body of work consisting of over 200 surviving independent works, and at least several dozen that are considered lost. As far as known, Bach's earliest cantatas date from 1707, the year he moved to Mühlhausen, although he may have begun composing them at his previous post in Arnstadt. Most of Bach's church cantatas date from his first years as Thomaskantor and director of church music in Leipzig, a position which he took up in 1723.