A stressful mental or physical situation, such as a loved one's death, a major accident, a heated dispute, an unexpected loss, or a sudden sickness, can lead to a short-term cardiac condition in which the main pumping chamber of the heart changes in shape, reducing the heart's capacity to pump blood properly. It can affect both men and women, although it is more common in older women.

Here is an interesting question for you! Source - National Organization for Rare Disorders