英语四级六级阅读练习（5）：女性比男性更容易心碎

1. when a sudden shock or prolonged stress causes heart attack-like symptoms or heart failure, it is called broken heart syndrome.

2. The difference is that the factors that would normally cause heart attack, such as a blocked artery, aren't present.

3. One theory is that hormones play a role. Another is that men have more adrenaline receptors on cells in their hearts than women do.