Browse Reference Articles
11 to 20 of 646 articles
-
Blood pressure
Blood pressure is the pressure exerted by the blood on the walls of the blood vessels. Unless indicated otherwise, blood pressure is understood to mean arterial blood pressure, i.e., the pressure in ... > more -
Anxiety
Psychiatry
Attention Deficit Disorder
Disorders and Syndromes
Healthy Aging
Mental Health Research
Panic attack
A panic attack is a period of intense, often temporarily disabling sense of extreme fear or psychological distress, typically of abrupt onset. Though it is often a purely terrifying feeling to the ... > more -
Transplant rejection
Transplant rejection occurs when the immune system of the recipient of an transplant attacks the transplanted organ or tissue. This is because a normal healthy human immune system can distinguish ... > more -
Artificial heart
An artificial heart is a prosthetic device that is implanted into the body to replace the original biological heart. It is distinct from a cardiac pump, which is an external device used to provide ... > more -
Echocardiography
The echocardiogram is an ultrasound of the heart. Using standard ultrasound techniques, two-dimensional slices of the heart can be imaged. The latest ultrasound systems now employ 3D real-time ... > more -
Heart valve
In anatomy, the heart valves are valves in the heart that maintain the unidirectional flow of blood by opening and closing depending on the difference in pressure on each ... > more -
Coronary heart disease
Coronary heart disease (CHD), also called coronary artery disease (CAD) and atherosclerotic heart disease, is the end result of the accumulation of atheromatous plaques within the walls of the ... > more -
Local anesthetic
A local anesthetic is a drug that reversibly inhibits the propagation of signals along nerves. When it is used on specific nerve pathways, effects such as analgesia (loss of pain sensation) and ... > more -
Heart rate
Heart rate is a term used to describe the frequency of the cardiac cycle. It is considered one of the four vital signs. Usually it is calculated as the number of contractions (heart beats) of the ... > more
Search ScienceDaily
Number of stories in archives: 137,357

