PCE may stand for:

Business and economics
Personal consumption expenditure, or private consumption expenditure
Personal consumption expenditures price index, a measure of inflation

Chemistry and engineering
PCE or eticyclidine, an illegal drug related to Phencyclidine (PCP)
Tetrachloroethylene (perchloroethylene), widely used in dry-cleaning
Pro-opiomelanocortin converting enzyme, an enzyme
Pyrometric cone equivalent, measuring heat in the firing of pottery
Power conversion efficiency, a near synonym for "Energy conversion efficiency" often used in the field of photovoltaics

Computing
Path computation element, a network element used for pathfinding
Principle of computational equivalence, a concept developed by Stephen Wolfram published in the book A New Kind of Science
PC Engine, a video game console

Medicine
Prenatal cocaine exposure, exposure of a fetus to cocaine when a pregnant woman uses the drug
Eticyclidine, a dissociative anesthetic drug

Organizations
Paavai College of Engineering, Namakkal, Tamil Nadu, India
Padmanava College of Engineering, Rourkela, an engineering college in Rourkela, Orissa state, India
Parents for Choice in Education, an advocacy group in Utah, U.S.
The link between anxiety and palpitation may also explain why many panic attacks involve an impending sense of cardiac arrest. Similarly, physical and mental stress may contribute to the occurrence of palpitation, possibly due to the depletion of certain micronutrients involved in maintaining healthy psychological and physiological function. Gastrointestinal bloating, indigestion and hiccups have also been associated with overstimulation of the vagus nerve causing palpitations, due to branches of the vagus nerve innervating the GI tract, diaphragm, and lungs.Many psychiatric conditions can result in palpitations including depression, generalized anxiety disorder, panic attacks, and somatization. However one study noted that up to 67% of patients diagnosed with a mental health condition had an underlying arrhythmia. There are many metabolic conditions that can result in palpitations including, hyperthyroidism, hypoglycemia, hypocalcemia, hyperkalemia, hypokalemia, hypermagnesemia, hypomagnesemia, and pheochromocytoma. Medication
The medications most likely to result in palpitations include sympathomimetic agents, anticholinergic drugs, vasodilators and withdrawal from beta blockers.Common etiologies also include excess caffeine, or marijuana. Cocaine, amphetamines,  3-4 methylenedioxymethamphetamine (Ecstasy or MDMA) can also cause palpitations. Pathophysiology
The sensation of palpitations can arise from extra-systoles or tachyarrhythmia. It is very rarely noted due to bradycardia. Palpitations can be described in many ways. The most common descriptions include a flip-flopping in the chest, a rapid fluttering in the chest, or pounding in the neck. The description of the symptoms may provide a clue regarding the etiology of the palpitations, and the pathophysiology of each of these descriptions is thought to be different.