Your baby's heart works in a way that is exclusively meant for life inside the womb before birth. The lungs don't provide you with oxygen. It originates from the placenta through the umbilical cord, ...

Add Yahoo as a preferred source to see more of our stories on Google. A sudden onset of irregular heart rhythms can be disorienting. wildpixel/iStock via Getty Images Plus Atrial fibrillation, or ...

An irregular heartbeat could signal a heart rhythm disorder, also known as an arrhythmia. Experts urge those affected to get treated early to avoid serious complications.

Atrial fibrillation, or A-fib, is an irregular heart rhythm that increases a person's risk of stroke, heart failure and even premature death. While many risk factors contribute to A-fib, one stands ...