In a life-threatening situation, the heart beats faster and harder, invigorated by the fight-or-flight response, which instantaneously prepares a person to react or run. Now, a new study by researchers at Temple University School of Medicine (TUSM) shows that the uptick in heart muscle contractility that occurs under acute stress is driven by a flood of calcium into mitochondria, the cells’ energy-producing powerhouses.  The opensource … Continue reading Researchers map how calcium uptake in mitochondria during a heart attack causes large cell death.