Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  N'ebe ndị dị afọ 18 ma ọ bụ karịa nọ, a na-akọwa ọbara mgbali elu dị ka ma ọ̀ bụ ọbara mgbali elu nke systolic ma ọ bụ ọbara mgbali elu nke diastolic nke dị elu karịa ụkpụrụ a nabatara (nke a dị elu karịa 129 ma ọ bụ 139 mmHg systolic, 89 mmHg diastolic dabere na ụkpụrụ nduzi). A na- eji ụkpụrụ ndị ọzọ eme ihe (135 mmHg systolic ma ọ bụ 85 mmHg diastolic) ma ọ bụrụ na e si n' nnyocha a na- eme n' ụlọ ọgwụ ma ọ bụ n' ebe obibi ruo awa 24 nweta ihe e ji atụ ihe. Ntụziaka ndị mba ụwa na-adịbeghị anya maka ọbara mgbali elu emewokwa ka e nwee ụdị dị iche iche n'okpuru ọkwa ọbara mgbali elu iji gosipụta ịdịgide nke ihe ize ndụ na ọbara mgbali elu n'ime ọkwa nkịtị. Akụkọ nke asaa nke Joint National Committee on Prevention, Detection, Evaluation and Treatment of High Blood Pressure (JNC7) nke e bipụtara n'afọ 2003 na-eji okwu prehypertension maka ọbara mgbali n'etiti 120<unk>139 mmHg systolic ma ọ bụ 80<unk>89 mmHg diastolic, ebe European Society of Hypertension Guidelines (2007) na British Hypertension Society (BHS) IV (2004) na-eji ụdị kachasị mma, nke nkịtị na nke dị elu iji kewaa nrụgide n'okpuru 140 mmHg systolic na 90 mmHg diastolic. A na-ekewapụkwa ọbara mgbali elu: JNC7 na-ekewapụ ọbara mgbali elu nke ọkwa I, ọbara mgbali elu nke ọkwa II, na ọbara mgbali elu systolic dịpụrụ adịpụ. Ọrịa ọbara mgbali elu nke na- eme n" otu ebe na- ezo aka n" ọbara mgbali elu nke na- eme n" otu ebe na ọbara mgbali elu nke na- eme n" otu ebe nke na- eme n" otu ebe, ọ na- adịkarịkwa n" etiti ndị agadi. Ntuziaka ESH-ESC (2007) na BHS IV (2004) na- akọwapụtakwa ọkwa nke atọ (ọkwa III ọbara mgbali elu) maka ndị nwere ọbara mgbali elu karịrị 179 mmHg ma ọ bụ nrụgide diastolic karịrị 109 mmHg. A na-ekewa ọbara mgbali elu dị ka nke " na- eguzogide ọgwụ " ma ọ bụrụ na ọgwụ adịghị ebelata ọbara mgbali elu ruo n'ọ̀tụ̀tụ̀ kwesịrị ekwesị. N'ọnwa Nọvemba afọ 2017, American Heart Association na American College of Cardiology bipụtara ntuziaka jikọtara ọnụ nke na-emelite ndụmọdụ nke akụkọ JNC7.  Ajụjụ: Gịnị bụ ọkwa nke atọ nke ọbara mgbali elu?
ihe karịrị 179 mmHg ma ọ bụ nrụgide diastolic karịrị 109 mmHg