extra beat

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A pulsation or throb (e.g., as in contraction of the heart).

apex beat

The impulse of the heart felt by the hand when held over the fifth or sixth intercostal space in the left midclavicular line.

artificially paced beat

A heartbeat stimulated by an artificial pacemaker.

captured beat

A ventricular contraction directly stimulated by an electrical impulse either from the sinus node or from the pulse generator of a pacemaker.

complex ectopic beat

Any electrical activation of the heart that originates outside the sinoatrial node.

dropped beat

A single interruption in the regular pacing of the electrical and mechanical activity of the heart.

ectopic beat

An electrical impulse that begins at any place in the heart other than the sinoatrial node.

escape beat

A depolarization of the heart that occurs after a prolonged pause or after failure of the sinus node to generate an electric impulse. Most escape beats are generated in the ventricles.

extra beat


forced beat

Extrasystole brought on by artificial heart stimulation.

premature beat

An electrical impulse that arises from a site other than the sinus node in the heart, occurring before the expected sinus beat.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
High visibility policing was introduced during evenings and weekends with extra beat officers talking to the youths and moving them on if they were causing problems.
But the scheme ran into fierce criticism yesterday as police officers said the pounds 20million budget would have been better spent on 400 extra beat bobbies.
The divisional police commander has drafted extra beat bobbies into the town to reassure local people.
Because of that, my heart often compensated by this kind of extra beat. He said it wasn't anything I should worry about and that it was fine to run the marathon, but I should ease off the exercise/training.
As the veterans get older, the snap of their heels on asphalt, once as crisp as gunshot, now has an extra beat in the military timing.
Up to 50 extra beat bobbies will be recruited as part of the scheme, which will also tackle racism and under-age drinking.
Police were yesterday looking into the reports and extra beat bobbies have gone on the streets in a county-wide crackdown on crime and disorder.
Munn has drafted in extra beat officers to combat the problem in his own division in Hamilton, Lanarkshire, after a string of attacks by addicts.
Anyone who spots anything suspicious is asked to tell shop staff, who can alert the extra beat bobbies and CV One ambassadors.
Given a specific allocation and a surfeit of applicants, why, after nine months of the financial y ear have passed, have no extra beat bobbies been appointed?
The wise but not so old head of the 32-year-old suggests Harriers will be favourites to dispose of Dr Martens Premier title-chasers Burton, the team they defeated to win the FA Trophy in 1987, but there's no doubt the heart will be pounding that extra beat when he follows into his father's foot-steps for the first time at Aggborough.
Now extra beat officers have been called in to protect passengers.