| 释义 |
DictionarySeebeatextra beat
beat (bet) A pulsation or throb (e.g., as in contraction of the heart).apex beatThe impulse of the heart felt by the hand when held over the fifth or sixth intercostal space in the left midclavicular line.artificially paced beatA heartbeat stimulated by an artificial pacemaker. captured beatA ventricular contraction directly stimulated by an electrical impulse either from the sinus node or from the pulse generator of a pacemaker.complex ectopic beatAny electrical activation of the heart that originates outside the sinoatrial node.dropped beatA single interruption in the regular pacing of the electrical and mechanical activity of the heart. ectopic beatAn electrical impulse that begins at any place in the heart other than the sinoatrial node.escape beatA 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 beatExtrasystole.forced beatExtrasystole brought on by artificial heart stimulation. premature beatAn electrical impulse that arises from a site other than the sinus node in the heart, occurring before the expected sinus beat. |