Matsi na diastolic yana nufin ƙananan ma'aunin hawan jini guda biyu da aka rubuta yayin karatun hawan jini. Yawanci ana auna hawan jini ta amfani da lambobi biyu: matsa lamba na systolic akan matsa lamba diastolic. Matsi na diastolic yana wakiltar bugun jini lokacin da zuciya ke hutawa tsakanin raguwa, musamman a lokacin shakatawa da cika lokacin zagaye na zuciya. auna a millimeters na mercury (mmHg). Yana nuna matsi da ake yi a bangon jijiya lokacin da zuciya ke cikin yanayin hutu, yana ba da damar jini ya shiga cikin arteries na jijiyoyin jini kuma ya watsar da kyallen takarda. Ana la'akari da matsa lamba na diastolic na 80 mmHg ko ƙasa a cikin kewayon al'ada na manya, amma madaidaitan jeri na iya bambanta dangane da dalilai kamar shekaru da lafiyar gabaɗaya. Babban matsin lamba na diastolic, wanda aka sani da hauhawar jini na diastolic, na iya nuna matsalolin kiwon lafiya da ke cikin tushe kuma yana iya ba da gudummawa ga matsalolin zuciya da jijiyoyin jini idan ba a sarrafa su ba.