Images of the players’ hearts showed signs of inflammation consistent with myocarditis, a rare but potentially fatal condition.

There is little evidence that antihypertensive drugs worsen COVID-19, and scientists are instead exploring the idea that such medications—or their downstream effects—may actually alleviate symptoms.

A bioengineered heart made of pig and synthetic tissues beats like the real thing.

A growth factor treatment helps improve cardiac functioning after heart attack in pigs.

To advance the possibility of off-the-shelf cardiac cell therapies, scientists devise an engineered cardiac stem cell that avoids stimulating a detrimental immune attack.

A study in mice reveals that stem cell transplants, currently in clinical trials, may not actually require the cells.

Slowing to just two beats per minute, the animals’ heart rate shows how they survive plunging far below the ocean’s surface to eat.

A clinical trial is underway to see if suspended animation, in which the body is cooled to 10–15 °Celsius, could slow patients’ decline and give doctors time to operate.

Scientists show the approach can kill cells that cause hardening of heart tissue in mice.