"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." Heartbeat monitors have been around for decades. Polar introduced the first wireless wearable ...

Defibrillators and pacemakers help the heart maintain a regular rhythm. Defibrillators deliver a shock if the heart goes into arrhythmia. Pacemakers use electrical impulses to keep the heart from ...

It's essential to seek emergency care if a rapid heartbeat is paired with confusion or chest pain. ER treatments for tachycardia include medications and electrical cardioversion. Managing stress and ...