This symptom occurs when the heart muscle is not getting enough blood because of the narrowing arteries. If you encounter any type of chest pain or discomfort, especially when doing physical ...

Years pass with no visible signs. Once chest pain, fatigue or other physical symptoms set in, the heart has already been overworked and damaged. Warning signs of an unhealthy heart, though, can lurk — ...

Heart tissue in healthy mice (left). Heart tissue in MSD mice (middle). When MSD mice received a bone transplant from healthy mice, the unhealthy heart tissue became healthy. Disclaimer ...