The BBB lets some substances, such as water, oxygen, carbon dioxide, and general anesthetics, pass into the brain. It also keeps out bacteria and other substances, such as many anticancer drugs. Also called blood-brain barrier.
What is BBB nursing?
Abbreviation for blood-brain barrier.
What does be means in medical terms?
Abbreviation for barium enema.
What is BBB cardiology?
Bundle branch block is a condition in which there’s a delay or blockage along the pathway that electrical impulses travel to make your heart beat. It sometimes makes it harder for your heart to pump blood efficiently through your body.
What is blood-brain barrier function?
The blood-brain barrier (BBB) mediates the communication between the periphery and the central nervous system (CNS). Recently, CNS insulin resistance has been elucidated to play a role in neurodegenerative disease.
What is LBBB ECG?
Left bundle branch block (LBBB) is a common electrocardiographic (ECG) abnormality seen in patients whose normal cardiac conduction down both anterior and posterior left fascicles of the His-Purkinje system is compromised.
Is a BBB sinus rhythm?
The right and left bundle branches distribute the electrical impulse from the bundle of His across the right and left ventricles, causing them to beat. When the bundle branches are functioning normally, the right and left ventricles contract regularly and nearly simultaneously. This is described as normal sinus rhythm.
What is complete AV block?
Complete heart block is the most serious type of AV heart block. It happens when the electrical impulses that tell your heart when to beat don’t pass between the top (atria) and bottom chambers (ventricles) of your heart. This can affect the flow of blood to your body and brain.
Is RBBB life threatening?
In people with known or suspected heart disease, right bundle branch block is associated with a greater risk of death, especially after a heart attack. Some people with right bundle branch block may ultimately need a permanent pacemaker, but this is rare.
What is BBB blood-brain barrier?
The blood-brain barrier (BBB) is a diffusion barrier, which impedes influx of most compounds from blood to brain. Three cellular elements of the brain microvasculature compose the BBB-endothelial cells, astrocyte end-feet, and pericytes (PCs).
What causes damage to the blood-brain barrier?
Vascular factors (stroke, hypertension, diabetes, etc.) and genetic factors (such as APOE4) cause defects in the vascular system leading to blood–brain barrier (BBB) impairment and oligemia (reduced cerebral blood flow), which finally correlate with dementia and neuronal degeneration.
How can the blood-brain barrier be a problem?
Meningococcal bacteria can bind to the endothelial wall, causing tight junctions to open slightly. As a result, the blood–brain barrier becomes more porous, allowing bacteria and other toxins to infect the brain tissue, which can lead to inflammation and sometimes death.
