What is the significance of stage 3 hypertension?

See below. The esh-esc guidelines (2007)[49] and bhs IV (2004), [50] additionally define a third stage (stage iii hypertension) for people with systolic blood pressure exceeding 179 mmhg or a diastolic pressure over 109 mmhg very bad.
Worse if higher. The consensus panels that assess best management of high blood pressure have traditionally "staged" blood pressure severity, with the higher numbers, the worse it is. Stage 3 (or now 2) high blood pressure conveys high risk of cardiovascular complications (heart attack, heart failure, stroke, kidney damage, peripheral arterial disease). Aggressive treatment is undoubtedly required.