electrical+alternation

См. также в других словарях:

• Electrical alternans — is an electrocardiographic phenomenon of alternation of QRS complex amplitude or axis between beats. It is seen in cardiac tamponade and is thought to be related to changes in the ventricular electrical axis due to fluid in the pericardium.ee… …   Wikipedia

• alternation — The occurrence of two things or phases in succession and recurrently; used interchangeably with alternans. cardiac a. the occurrence of any cardiac phenomenon every other beat. concordant a. a. in either the mechanical or electrical activity of… …   Medical dictionary

• alternation of the heart — alternating variation in the intensity of the heartbeat or pulse over successive cardiac cycles of regular rhythm. Called also mechanical alternans. Cf. electrical alternans …   Medical dictionary

• Inverter (electrical) — An inverter is an electrical device that converts direct current (DC) to alternating current (AC)[1]; the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits. Solid… …   Wikipedia

• alternans — Alternating; often used substantively for alternation of the heart, either electrical or mechanical. Alternating; used as a noun in the sense of pulsus a.. [L.] auditory a. SYN: auscultatory a.. auscultatory a. alternation in the intensity of… …   Medical dictionary

• mechanical alternans — alternation of the heart, used particularly in contrast with electrical alternans …   Medical dictionary

• eye, human — ▪ anatomy Introduction  specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit       The eye is protected from mechanical injury… …   Universalium

• nervous system, human — ▪ anatomy Introduction       system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …   Universalium

• sound reception — Introduction       response of an organism s aural mechanism, the ear, to a specific form of energy change, or sound waves. Sound waves can be transmitted through gases, liquids, or solids, but the hearing function of each species is particularly …   Universalium

• nitrogen group element — ▪ chemical elements Introduction  any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …   Universalium

• History of Physics —     History of Physics     † Catholic Encyclopedia ► History of Physics     The subject will be treated under the following heads: I. A Glance at Ancient Physics; II. Science and Early Christian Scholars; III. A Glance at Arabian Physics; IV.… …   Catholic encyclopedia