Human heart
Latest about Heart & Circulation
![Nurse wiping an older male patient's arm with a cotton swab as she preps for a blood draw](https://cdn.mos.cms.futurecdn.net/mBeCMrG2bUUY7juxgK27dL-320-80.jpg)
Why are some people's veins 'hard to find'?
By Anna Gora published
From stress to dehydration, there are many reasons why some people's veins may be "hard to find" when they're getting an infusion or blood draw.
![spinning fair ride shown in motion while lit up at night](https://cdn.mos.cms.futurecdn.net/xi6bSwkH9gDtuZtRdF6dP6-320-80.jpg)
Fast-spinning ride at county fair triggers stroke in a young woman in unusual case
By Emily Cooke published
Only 20 cases of stroke caused by being on an amusement park ride have been reported worldwide.
![Scuba diver exploring underwater cave](https://cdn.mos.cms.futurecdn.net/Z7gsoUTjnG5gGVecd9mSvU-320-80.jpg)
Fluid leaked from scuba diver's blood vessels after 100-foot cave dive in rare medical case
By Emily Cooke published
This extreme form of inflammatory response due to diving has rarely been reported worldwide, an attending doctor said.
![Woman in bed puts hands on face in frustration with alarm clock in foreground](https://cdn.mos.cms.futurecdn.net/u9chXWMfEcxAACNoLjvGWE-320-80.jpg)
Scientists may have found the missing link between heart disease and sleep problems
By Emily Cooke published
A new study suggests sleep problems often experienced by people with heart disease may be caused by damage to a group of nerves that regulate both the heart and the brain.
![a gloved surgeon's hands holding a human heart that they're preparing for transplant. A second surgeon's gloved hands can be seen reaching over the patient's covered body to adjust something](https://cdn.mos.cms.futurecdn.net/mzWh9KQFYtKZgeCqCZGzYJ-320-80.jpg)
'Reanimated' hearts can be successfully transplanted and could expand donor pool
By Nicoletta Lanese published
A gold-standard clinical trial suggests that "reanimating" donated hearts is a viable strategy for expanding the pool of potential heart donors.
![close up photo of a light brown brown recluse spider on a black background](https://cdn.mos.cms.futurecdn.net/Fx7w6n47u9cQM2DLMw4dkh-320-80.jpg)
In rare case, man develops painful deep vein blood clots following brown recluse spider bite
By Nicoletta Lanese published
A man in Michigan developed deep vein thrombosis after reportedly being bitten by a brown recluse spider.
![We see the chest of a man in a work shirt. He is clutching his heart in an area digitally highlighted in red to show he is having a heart attack.](https://cdn.mos.cms.futurecdn.net/kfBjCnzd5tQEnxMqxGqS3J-320-80.jpg)
What happens during a heart attack?
By Anna Gora published
A heart attack, or myocardial infarction, happens when oxygen-rich blood does not reach a part of the heart muscle.
![3D illustration of a human heart inside a chest.](https://cdn.mos.cms.futurecdn.net/8Mg2k3Mh6rtJGz8A5cixUG-320-80.jpg)
Coronary artery disease (CAD): Causes, diagnosis and treatment
By Dr. David Warmflash published
Coronary artery disease (CAD) is caused by plaque buildup in the wall of arteries that supply blood to the heart.
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