The part of the autonomic nervous system originating in the brain stem and the lower part of the spinal cord that, in general, inhibits or opposes the physiological effects of the sympathetic nervous system, as in tending to stimulate digestive secretions, slow the heart, constrict the pupils, and dilate blood vessels.
Paroxysmal supraventricular tachycardia (PSVT) Alternative names PSVT; Supraventricular tachycardia Definition: Paroxysmal supraventricular tachycardia (PSVT) is a rapid heart rate, which occurs from time to time (paroxysmal). PSVT starts with events taking place above the ventricles.
Partial stroke testing (or PST) is an accepted petroleum industry standard technique and is also quantified in detail by regulatory bodies such as the International Electrotechnical Commission (or IEC) and the Instrument Society of America (or ISA).The following are the standards appropriate to these hotbodies.n addition to ESDVs PST is also used on High Integrity Pressure Protection Systems or HIPPS. Partial Stroke Testing is not a replacement for the need to fully stroke valves as proof testing is still a mandatory requirement.