Whois & Analysis for watchman.com

The atrium (plural: atria) is a blood collection chamber of the heart.

It was previously called the auricle, and that term is still used to describe this chamber in, for example, the Mollusca, but in humans that name is now used for an appendage of the atrium.

The atrium is an upper chamber in which blood enters the heart, as opposed to the lower ventricle, where it is pushed out of the organ.

It has a thin-walled structure that allows blood to return to the heart.

All animals with a closed circulatory system include at least one atrium/ auricle (humans have two atria).

A stroke is when poor blood flow to the brain results in cell death.

There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding.

They result in part of the brain not functioning properly.

Signs and symptoms of a stroke may include an inability to move or feel on one side of the body, problems understanding or speaking, feeling like the world is spinning, or loss of vision to one side.

Signs and symptoms often appear soon after the stroke has occurred.

If symptoms last less than one or two hours it is known as a transient ischemic attack (TIA) or mini-stroke.

A hemorrhagic stroke may also be associated with a severe headache.

The symptoms of a stroke can be permanent.

Long-term complications may include pneumonia or loss of bladder control.

Atrial fibrillation (AF or A.fib) is an abnormal heart rhythm characterized by rapid and irregular beating.

Often it starts as brief periods of abnormal beating which become longer and possibly constant over time.

Most episodes have no symptoms.

Occasionally there may be heart palpitations, fainting, lightheadedness, shortness of breath, or chest pain.

The disease is associated with an increased risk of heart failure, dementia, and stroke.

It is a type of supraventricular tachycardia.

An implant is a medical device manufactured to replace a missing biological structure, support a damaged biological structure, or enhance an existing biological structure.

Medical implants are man-made devices, in contrast to a transplant, which is a transplanted biomedical tissue.

The surface of implants that contact the body might be made of a biomedical material such as titanium, silicone, or apatite depending on what is the most functional.

In some cases implants contain electronics e.g. artificial pacemaker and cochlear implants.

Some implants are bioactive, such as subcutaneous drug delivery devices in the form of implantable pills or drug-eluting stents.

A heart valve normally allows blood to flow in only one direction through the heart.

The four valves commonly represented in a mammalian heart determine the pathway of blood flow through the heart.

A heart valve opens or closes incumbent on differential blood pressure on each side.