A sudden change in heart rhythm is a scary and serious condition that can predict life-threatening illnesses like heart failure and stroke. But immediate treatment may decrease risks for those illnesses.

Heart disease is the leading cause of death and disease in the United States. And some people may be more at risk than others — even if they have the same symptoms.

Cardiovascular exercise like running or walking has a number of health benefits. But too much exercise may be unhealthy, especially after a heart attack.

A variety of medicines can treat irregular heart rhythm. But one of those medicines may increase the risk of death.

After a stroke, patients often show slower brain function. But declining memory and attention in stroke-free adults may be a risk factor for future strokes.

The incidence of one type of heart attack has risen, but fewer patients died after hospitalization — and medical procedures right after admission may be the reason.

Many people worry about having high blood pressure, especially if high blood pressure runs in the family. But low blood pressure may also be unsafe.

High blood pressure is associated with serious medical issues like heart disease and stroke. But it may also affect mental clarity later in life.

The increased risk of heart problems in patients with elevated blood pressure is well-established. But lower blood pressure may not decrease the risk of stroke, heart attack and other complications.

Getting the heart to beat normally is the goal of treatment for patients with atrial fibrillation. One particular treatment may decrease death in patients with atrial fibrillation by doing just that.