A new pacemaker that uses light instead of a battery could be implanted less invasively and cause patients less pain than current ones.

Tiny proteins called nanobodies derived from llama antibodies could lead to safer ways to treat pain, irregular heart rhythms, and seizures.

An algorithm that assesses scar patterns in heart tissue can predict potentially life-threatening arrhythmias more accurately than doctors can.

Radiation therapy can fix a life-threatening heart rhythm without invasive procedures by reverting heart muscle to a younger state, research suggests.

A compound called C28 could potentially keep medications from causing a dangerous and sometimes deadly arrhythmia as a side effect.

New research shows just how the malaria drug hydroxychloroquine causes dangerous and potentially deadly heart arrhythmias in animal models.

Researchers have created a computer model to test whether a drug will come with arrhythmia risk. Even drugs for arrhythmia have had this scary side effect.

An "off-the-shelf" cardiac patch can deliver cell therapy directly to site of heart attack damage and doesn't use live cells, cutting the risk of rejection.

New research shows how low oxygen levels in the heart can result in life-threatening arrhythmias, or disorganized heart rhythms.

The drug mexiletine is the go-to drug for people with arrhythmia, but it doesn't work for everyone. A new mathematical model may improve outcomes.