Polymorphic ventricular tachycardia is an abnormal heart rhythm where the bottom chambers of your heart beat too quickly. People with severe cases may experience sudden cardiac arrest. Conditions that ...

Tachycardia describes when the heart beats faster than normal. Sinus rhythm with tachycardia occurs when the sinus node fires electrical impulses abnormally quickly. Inappropriate sinus tachycardia ...

Tachycardia is when your heart beats faster than normal, even when you’re not doing anything. Junctional tachycardia is a form of supraventricular tachycardia, a type of racing pulse caused by a ...

Non-sustained ventricular tachycardia is an abnormally fast heart rate that occurs in the lower chambers of the heart and lasts for less than 30 seconds. Tachycardia is a heart rate that is faster ...

Nonsustained ventricular tachycardia, a type of arrhythmia, can cause short episodes of rapid heart rate and related symptoms. It usually doesn’t affect life expectancy, but treatment can help you ...

What Is Inappropriate Sinus Tachycardia? Sinus tachycardia is when your body sends out electrical signals to make your heart beat faster. Hard exercise, anxiety, certain drugs, or a fever can spark it ...

The comedian, who died Tuesday at 67, was dealing with "a very specific, rare genetic disorder," cardiologist Dr. Jennifer Haythe tells PEOPLE Julie Mazziotta is the Senior Sports Editor at PEOPLE, ...