The brief was won after a six-way pitch.
EMS worked for the British Heart Foundation previously on a two-year roadshow which reached 35,057 people in England.
The new brief will target Scotland and the North.
"A notable success of the Heart Health roadshow has been the high rate of people who have been encouraged to sign up for ongoing information and support from the charity - ensuring that the campaign will bring benefits for months and years to come," said EMS client services director Justin Isles.
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