<prompt> An 70-year-old male patient complains of headache and dizziness. His ambulatory BP was 15476 mm Hg on multiple occasions. He is likely to be diagnosed as ?Grade 1 hypeensionWhite coat hypeensionSecondary hypeensionIsolated systolic hypeension  <response>: Isolated systolic hypeension - When SBP 140 and DBP 90 . Classification of Blood Pressure for Adults - European Society of Cardiology guidelines - 2018 Blood pressure classification SBPmmHg DBPmmHg Optimal 120 80 Normal 120-129 80-84 High Normal 130-139 85-89 Grade 1 hypeension 140-159 90-99 Grade 2 Hypeension 160-179 100-109 Grade 3 Hypeension 180 110 Isolated systolic hypeension 140 90 