Kalmar “yankin dullness na zuciya” yana nufin wani yanki a bangon kirji inda ba a ji sautin sautin da zuciya ke fitarwa, saboda kasancewar ita kanta zuciyar da take da yawa don haka ta dusashe sautin. Ana iya amfani da wurin dullness na zuciya don taimakawa wajen gano matsayin zuciya da gano wasu yanayin kiwon lafiya.
