bradycardia is when the heart beats too slowly.
tachycardia refers to when the heart beats too fast.
See: arrhythmia
Glossary
Selected words and phrases
lymphocyte – medical term for a white (clear) immune cell in blood, lymph or lymph tissue. Two main types of lymphocyte are B cells and T cells. CD4 cells and CD8 cells are both types of T cells. Sometimes a CD4 count is referred to as a CD4 T cell count or a T cell count.
monoinfection – infection with only one virus
Tmax – the time taken for a drug to reach the highest (maximum) concentration.
amniocentesis – test in which cells around a fetus are removed and examined to detect genetic abnormalities