A stab wound can be worse than a gunshot wound depending on the location. If the stab hits a vase and the shot doesn't, it could be worse. Blunt heart injury is a blow to the chest that injures the heart muscles, lacerates (ruptures) the walls of the heart, or damages a heart valve. People may feel like their heart is pounding or racing, feel short of breath, or have dangerously low blood pressure. In other words, you die if you're lucky.