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The elevation of his diastolic pressure is mild - not an emergency / not likely to lead to immediate problems. Of course, for the long term, it needs good control and very often, it is not difficult.
Considering his age, he needs a battery of investigations / often extensive - for the cause of the pressure and the events.
can not be done when the pressure is high.
Patience and perseverance are the key.
Wishing speedy recovery