various methods of joining hairpin lace crochet - some a sort of cable using no extra yarn, others basic crochet stitches; this is hairpin heaven! scores of detailed charts, pics on hairpin techniques ideas.
Heart Rnd (Right Side) Ch join with sl st to first ch to form ring; ch hdc in ring, ch 4 times; join with sl st to first hdc. hdc and 4 sps) Row [(Dc, 5 htr, dc) in center hdc of next group, sl st in next sp] twice. Finish off and weave in ends.