"Jealous Heart" is a classic C&W song written by American country music singer-songwriter Jenny Lou Carson. In the mid 1940s it spent nearly six months on the Country & Western charts. It was subsequently recorded by several pop singers.

The first recording of "Jealous Heart" was made in 1944 by its composer Jenny Lou Carson. That 20 September Tex Ritter recorded the song: his version spent 23 weeks on the C&W chart peaking at No. 2.

The song had its first impact in the Pop field via a recording by Al Morgan, a Chicago-based vocalist/pianist whose version of "Jealous Heart" released September 1949 was on the hit parade for six months spending ten weeks in the Top 5. This Al Morgan is not to be confused with the bassist of the same name.

Also in 1949 Ivory Joe Hunter had an R&B hit with "Jealous Heart"; Hunter's version reached No. 2 R&B that December.

"Jealous Heart" - which Ernest Tubb had recorded in 1945 - was also recorded in 1949 by C&W singers Bill Owens and Kenny Roberts while Pop versions were cut by Bill Lawrence, Jan Garber & His Orchestra (vocal by Bob Grabeau) and Hugo Winterhalter & His Orchestra (vocal by Johnny Thompson).

British duo the Tanner Sisters - Frances and Stella - recorded "Jealous Heart" in London 14 October 1949; this version - which retained the lyrics as recorded by Tex Ritter and Al Morgan rather than gender-adjusting them - was released by EMI as HMV#9846 with "Hop Scotch Polka" as the flip. This duo should not to be confused with the American female trio of the same name.

...
Wikipedia