As a result of the unnecessary effort, his blood pressure rose above normal.

Literal

Unnecessary [attributive-な] effort [possessive-の] result, his [possessive-の] blood-pressure [topic-は] usual above-[以上] rose.

余計な ('unnecessary / excessive / uncalled-for'). 通常以上 ('above normal,' with 以上 'above/more than' as a suffix). 血圧 ('blood pressure'). Medical/narrative register.