Под сердцем ёкнуло .
под сердце екнуть .
ADP NOUN VERB PUNCT
ADP NOUN VERB PUNCT
_ Animacy=Inan|Case=Ins|Gender=Neut|Number=Sing Aspect=Perf|Gender=Neut|Mood=Ind|Number=Sing|Tense=Past|VerbForm=Fin|Voice=Act _
case obl root punct