Yes, it counts. The heart line is also called love line and it is one of the three major lines in palm reading. It's just above the head line starting from the edge of the palm under the little finger, running across the palm and ending below the middle finger or forefinger or the place where they join. The heart line usually shows a person's attitude to love and quality of love.
You can elarn more on https://www.yourchineseastrology.com/palmistry/heart-line-reading.htm