About carey coombs murmur which is false –
Delayed diastole murmur
Seen in rheumatic fever
Can be associated with AR
Low pitched murmur
Carey-Coombs Murmur 

Heard in patients with acute rheumatic fever.
Occurs due to inflammation of mitral valve cusps or excessive left atrial blood flow as a consequence of MR.
Soft middiastolic murmur usually follows