Infectious agents can cause muscle twitching and spasms, too. The most commonly known is probably tetanus, which causes a phenomenon called lockjaw, where the neck and jaw muscles contract to the ...

Adrenaline increases the "alertness" of the nervous system, meaning it's ready to trigger muscle contraction. It also increases the amount of blood flow and changes the tension of the muscles, which, ...

A normal coronary angiogram does not always guarantee safety from a heart attack. Conditions like microvascular disease, ...

CHICAGO - Beth Meter is a cardiac nurse who has seen plenty of heart attacks, so when her son complained of sudden crushing chest pain that spread to his arm, she was certain he was having one.

A new study delves into the unconventional causes of heart attacks in women and people under 45. It points at the need for expanded understanding of heart attack prevention. It also reminds us that ...

Chest pains are more common than we think. Many people experience these out of nowhere, no fore warning or previous occurrences etc. Usually having chest pains is associated with heart attacks, which ...