Graeme Souness urged his fans to learn heart massage and help save lives.
69 year old Liverpool, Newcastle and Blackburn boss joined British Heart Foundation to raise awareness.
In a survey of 2,000 UK adults commissioned by the BHF to celebrate Heart Month in February, 45 percent will not notice signs of cardiac arrest.
At Euro 2020, Christian Eriksen suffered a heart attack while playing for Denmark, and several matches, including Newcastle and Fulham, were stopped due to medical emergencies in the crowd.
Souness has her own personal experience of coronary heart disease and undergoes triple bypass after being diagnosed in her early 30s.
Scot, a long-time FB ambassador, asks fans to learn CPR through RevivR, BHF’s online tool that teaches CPR in 15 minutes.
He said: “CPR is game changer and may be the most important lesson you’ve ever learned. With RevivR, you’ll have skills that will save a life in just 15 minutes – halfway through.
“Every fan in every football club nationwide can make a difference, so please join FBiH today and let’s unite to form a new lifeguard team.”