A palpitation can be felt when the heart beats too fast, too slow or irregularly--this is called an arrhythmia. Many things can cause palpitations including: dehydration, fever, drinking too much...
A palpitation is an awareness of the beating of the heart, whether it is too slow, too fast, irregular, or at its normal frequency. Palpitations may be brought on by overexertion, adrenaline,...
Feet are usually written as ', and the symbol is also used to denote arcminutes.
Prime units of any type will also be marked in such a manner, as are minutes of angle and time.