Tag Archives | Heart

Mouse Heart Made to Beat Again with Human Cells

Happy-Valentine-s-Day-Mouse-9780061804328Dr. Herbert West was unavailable for comment at the time of publication.

Via E! Science News:

For the first time, a mouse heart was able to contract and beat again after its own cells were stripped and replaced with human heart precursor cells, said scientists from the University of Pittsburgh School of Medicine. The findings, reported online today in Nature Communications, show the promise that regenerating a functional organ by placing human induced pluripotent stem (iPS) cells — which could be personalized for the recipient — in a three-dimensional scaffold could have for transplantation, drug testing models and understanding heart development.

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British Woman Allegedly Recovers After Dying For 45 Minutes

The question is, to where did her consciousness migrate during that time? Biblical heaven? A flying saucer? The black lodge from Twin Peaks? The BBC reports that she does not recall:

A 63-year-old woman who was expected to die after her heart stopped for 45 minutes is recovering well. Carol Brothers, from Easterton near Devizes, collapsed outside her home from a heart attack, last month.

Mrs. Brothers was returning home from a shopping trip with her daughter when she collapsed, said her husband David: “She was flat out on the floor, just changing colour – a horrible colour and basically I panicked.”

Paramedics managed to restart her heart after 45 minutes and she was airlifted to hospital. Mrs. Brothers is now recovering at home but says she has no memory of her ordeal.

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Heartless: Man Alive Without Heart Or Pulse

heartlessPerhaps in the future, we’ll spend our youth — i.e. the first hundred or so years of our lives — with a heart and a pulse, and our next couple hundred without them. DesignTaxi writes:

Two doctors from the Texas Heart Institute successfully replaced a dying man’s heart with a device—proving that it is possible for your body to be kept alive without a heart, or a pulse.

The turbine-like device, that are simple whirling rotors, developed by the doctors does not beat like a heart, rather provides a ‘continuous flow’ like a garden hose.

If you listened with a stethoscope, you wouldn’t hear a heartbeat. If you examined [the] arteries, there’s no pulse. Hooked up to an EKG, [he’d] be flat-lined.”

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Broken Hearts Lead To Heart Attacks

Fibonacci (CC)

Fibonacci (CC)

Yup, that’s right, a figurative broken heart is now positively linked to increased risk of a physical heart attack. Alice Park reports for Time:

Grief is a powerful emotion, and the latest research shows just how damaging it can be, especially for the heart.

The sobering results, appearing in the journal Circulation, is the first to compare how grief affects an individual’s heart disease risk within a period of time. Previous studies have documented that people losing loved ones tend to have more heart problems than those who aren’t bereaved. In the current analysis, lead author Elizabeth Mostofsky and her colleagues took a unique approach by calculating an individual’s “average loss” of loved ones over a year, by asking how many people study participants had lost in the past year, and comparing that figure to the number of loved ones that same person lost during the study period in question, which included the most recent day and week preceding a heart attack.

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Sync Your Smartphone To Your Heart Implant

imedpicFrom a Dutch company comes a phone app that tracks your heart’s activity, and, one may assume, lets you pick a customized alert tone to sound when you enter cardiac arrest. Via Popular Science:

The new Human++ system adds one very powerful new peripheral to Android smartphones: your own body. It interprets electrocardiogram (ECG) readings, and can be used for medicinal or recreational purposes: Let your doctor know that you’re having a heart attack, or let your Facebook friends know that you’re playing basketball.

Created by Dutch research firm IMEC, Human++ is a type of wireless BAN (body area network). This particular version uses a dongle that actually plugs into your phone’s microSD slot (which is one reason it’s limited to Android–the iPhone, for one, doesn’t have a microSD slot) and receives data over a low-power radio system. Though Bluetooth is more popular, the nRF24L01+ frequency was chosen for its low power requirements.

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Magnetic Field Measurements of the Human Heart at Room Temperature

From ScienceDaily:

The “magnetically best shielded room on earth” has the size of an apartment block and is located on the site of the Physikalisch-Technische Bundesanstalt (PTB), Institute Berlin. Magnetic fields such as that of the earth are kept out here as effective as nowhere else. Such ideal conditions allow to measure the tiny magnetic fields of, e.g., the human heart.

This was the motivation for the American National Institute of Standards and Technology (NIST) to ask PTB to jointly test a newly developed optical magnetic field sensor. It is based on a physical principle very different from SQUIDs, which are usually applied for biomagnetic field measurements. The optical sensor does not need advanced cooling and has the size of a lump of sugar. A high-quality measurement of the human heart signal was demonstrated using this optical sensor. The sensor’s suitability was thus proven for biomagnetic measurements in the picotesla range.

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