With heart failure, the heart becomes enlarged and its electrical systems become stretched. This interferes with how the parts of the heart coordinate to contract and pump blood, making it inefficient ...

Heart failure is when the heart does not pump enough blood around the body. Biventricular heart failure is when chambers on both sides of the heart, known as ventricles, are affected. Doctors classify ...

The human heart is a highly complex pump made of muscle, complete with its own electric power system, supplying the energy and oxygen it needs to function. The heart’s pumping action is regulated by ...

Boston Scientific announced multiple recalls but has said its battery issues were limited. One internal test in 2025 found batteries with an “extremely high failure rate.” Credit...Illustration by Mel ...

You must have heard of pacemakers? They are required when the heart's natural system malfunctions, causing it to beat too slowly (bradycardia), irregularly, or even pause. All these can hinder ...