Rytmihäiriö

Rytmihäiriö (Finnish for 'arrhythmia') is a Finnish hardcore punk, thrash metal/crossover thrash, grindcore and surmacore Helsinki-based band established in 1988 until 1992, when the band was put on a hiatus. It had a comeback in 1998 with a number of changes in the line-up. The band is signed to Sakara Records, and for distribution Sony.

Band has taken their main inspiration from the occult, devil worship, Finnish mixed drink Gambina and Finnish crime magazine Alibi.

Members
Current lineup
 * Unto "Une" Helo – vocals (2002–present)
 * Janne Perttilä – guitars (1998–present)
 * Antti Kiiski – bass (1988-1992, 1998–present)
 * Jukka "Kosmo" Kröger – drums (2017–present)

Original band
 * Kalle Ellilä, vocals (1988-1989, died 2003) - replaced by
 * Pate Vuorio, vocals (1989–1991, 1998-2002) - replaced by
 * Silveri, vocals (1991-1992)
 * Marko Karimo, vocals (1991–1992)
 * Tuukka Laitinen, guitar (first period, 1988–1989) - replaced by
 * EQ, guitar (1989) replaced by
 * Nastis, guitar (1989–90), replaced by
 * Tuukka Laitinen, guitar (second period 1990-1991) -replaced by
 * Samppa (guitar, 1991–1992)
 * Antti Kiiski – bass (1988-1992, 1998-)
 * Otto Luotonen – drums (1988-1992, 1998-2016)

Discography
Studio albums

Compilation albums
 * 1991: Möfaa puujumalille (self-published)
 * 2003: Surman vuodet – The Homicide Years (Mörri Records)

Split albums
 * 1992: The End of Evolution... ...is Round the Corner (Spinefarm Records)
 * The End of Evolution... - by Rytmihäiriö
 * ...is Round the Corner - by Amen
 * 2004: Chaosbreed / Rytmihäiriö (Homorock Records)
 * Chaosbreed - by Chaosbreed
 * Rytmihäiriö - by Rytmihäiriö

EPs
 * 1990: Surmatyö (Surmatyö Records)
 * 1990: Ihmisiä kuolee! (Spinefarm Records)
 * 2003: Surmaa kännissä (Hukkalevyt, free download)

Collaboration - Singles as Mokoma / Rytmihäiriö / Stam1na