Group 1 - The sudden death of Zhao Han, co-founder and chairman of the restaurant brand Yunhaiyao, at the age of 40 due to a heart attack highlights the increasing concern for heart health among younger individuals [1][3] - Zhao Han co-founded Yunhaiyao in 2009 with his cousin and friends, and his passing has shocked the industry, especially given the pressures faced by the restaurant sector in recent years [1][3] - The trend of heart attacks among younger entrepreneurs is alarming, with many cases linked to significant stress and metabolic issues, as noted by medical professionals [3][4] Group 2 - Acute myocardial infarction is a critical condition primarily caused by the rupture or erosion of atherosclerosis, but an increasing number of young patients are being diagnosed with non-atherosclerotic myocardial infarction [3][4] - Research indicates that at least 20% of angina cases are triggered by emotional stress, with psychological pressure and negative life events significantly increasing the risk of acute myocardial infarction [3][4] - A recent study from Swinburne University of Technology has developed a method to measure changes in brain, heart, and vascular activity under psychological stress, revealing a clear pattern of interaction that leads to increased blood pressure [4]