Human heart
Latest about Heart & Circulation
![a woman with long brown hair sits at her kitchen table and uses an at-home blood pressure monitor, which includes an inflatable cuff on her arm](https://cdn.mos.cms.futurecdn.net/75PdbmWemramxhgtxSr4W4-320-80.jpg)
What is normal blood pressure?
By Anna Gora, Bahar Gholipour last updated
Here's what doctors consider a "normal," elevated or high blood pressure, and how to measure your BP at home.
![photo shows a light pink and orange device being held up by the gloved hands of a scientists in a lab setting](https://cdn.mos.cms.futurecdn.net/TqetboMBVMZ6eWy5nSmNL8-320-80.jpg)
Beating 'hearts on a chip' will travel to space on SpaceX's Dragon cargo ship tonight
By Nicoletta Lanese published
Tissue-based models of the human heart are being sent to the International Space Station.
![A woman spoons a sugar substitute into a mug.](https://cdn.mos.cms.futurecdn.net/hNbpbrNbonBGGuuXxjmdsJ-320-80.jpg)
Artificial sweetener may increase risk of heart attack and stroke, study finds
By Jennifer Nalewicki published
Erythritol, a sugar substitute, may be linked to an elevated risk of heart attack and stroke in at-risk adults.
![lower body shot of a nurse helping an elderly woman with a walking stick](https://cdn.mos.cms.futurecdn.net/gNRNDZe6QnyLtX5z4jEsAB-320-80.jpg)
Stroke: Symptoms, tests and treatment
By Elizabeth Peterson last updated
Stroke is the second leading cause of disability and death worldwide, and occurs when the flow of blood to the brain is disrupted.
![illustration of an irregular heartbeat](https://cdn.mos.cms.futurecdn.net/5iJLYQCAxxYmzU38y9zkKS-320-80.jpg)
Atrial fibrillation and arrhythmia: Causes, symptoms and treatment
By Stephanie Pappas last updated
Atrial fibrillation is a heart condition that causes an irregular heart rate. Sometimes, there can be no symptoms.
![female doctor explaining something to a male patient](https://cdn.mos.cms.futurecdn.net/s87bpV5pUAGUKjeK3xocsb-320-80.jpg)
9 heart disease risk factors, according to experts
By Lou Mudge published
It's the leading cause of death in the United States, but what are the top heart disease risk factors?
![abstract illustration of a human heart](https://cdn.mos.cms.futurecdn.net/3tLJY7ZXhC6Cq7qQe6cv9J-320-80.jpg)
Heart disease: Types, prevention and treatments
By Joe Brownstein last updated
Heart disease is the leading cause of death in the United States, and encompasses a range of conditions. But are there ways to avoid it?
![man walking his dog in a snow blizzard at dusk](https://cdn.mos.cms.futurecdn.net/zAHUJgoXJGx8mDKyrC9VqP-320-80.jpg)
Why are heart attacks more common in winter? A cardiologist explains
By Lou Mudge published
Colder weather can trigger a number of physiological changes that may increase the risk of a cardiac event.
Sign up for the Live Science daily newsletter now
Get the world’s most fascinating discoveries delivered straight to your inbox.