cardiac alternation

См. также в других словарях:

• cardiac alternans — alternation of the heart …   Medical dictionary

• 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

• 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

• T wave alternans — (TWA) is a periodic beat to beat variation in the amplitude or shape of the T wave in an electrocardiogram (ECG or EKG). T wave of ECG TWA was first described in 1908. At that time, only large variations ( macroscopic TWA) could be detected.… …   Wikipedia

• rhythm — 1. Measured time or motion; the regular alternation of two or more different or opposite states. 2. SYN: r. method. 3. Regular or irregular occurrence of an electrical event in the electrocardiogram or electroencephalogram. SEE ALSO: wave. 4.… …   Medical dictionary

• 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

• cycle — 1. A recurrent series of events. 2. A recurring period of time. 3. One successive compression and rarefaction of a wave, as of a sound wave. [G. kyklos, circle] anovulatory c. a …   Medical dictionary

• Pulse — The rhythmic dilation of an artery resulting from beating of the heart. It is often measured by feeling the arteries of the wrist. * * * Rhythmic dilation of an artery, produced by the increased volume of blood thrown into the vessel by the… …   Medical dictionary

• 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

• Discovery and development of renin inhibitors — Renin inhibitors are antihypertensive drugs that inhibit the first and rate limiting step of the renin angiotensin aldosterone system (RAAS). Since the 1970s scientists have been trying to develop potent inhibitors with acceptable oral… …   Wikipedia