Term
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Definition
| cyclic increase in normal HR with inspiration and decrease with expiration; no clinical significance, variability in P-P cycle length |
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Term
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Definition
| HR < 60 bpm; weakness, confusion or syncope is cerebral perfusion is impaired |
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Term
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Definition
| HR > 100 bpm; palpitations can occur |
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Term
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Definition
| occur when ectopic focus in the atria fires before the next sinus mode impulse or a reentry circuit is established; abnormal p waves, may cause abberant QRS complexes |
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Term
| paroxysmal supraventricular tachycardia |
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Definition
| reentry circut occurs suddenly and ends abruptly, often in women; rate 140-240 bpm, episodes start and end abruptly, last from minutes to hours; p wave contour differ from sinus beats |
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Term
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Definition
| irregular heart rhythm that is erratic and disorganized atrial activity; often asymptomatic but fatigue, palpitations, dyspnea possible; ECG: vent. rate rapid, rhythm irregular with absence of p waves |
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Term
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Definition
| stable, uniform atrial activation; atrial rates between 240-400 bpm, with regular patterns; s/s include palpitations, fatigue, poor exercise tolerance, mild dyspnea, presyncope |
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Term
| multifocal atrial tachycardia |
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Definition
| characterized by varying P wave morphologies and markedly irregular PP intervals; ECG reveals 3 or more distinct P wave morphologies; associated with COPD |
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Term
| ventricular premature beats |
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Definition
| wide QRS complexes that differ from normal |
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Term
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Definition
| 3 or more consecutive ventricular premature beats at a rate of 160-240 bpm caused by reentry arising from the ventricle; increased risk of sudden death, palpitations, dyspnea, syncope |
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Term
|
Definition
| usually preceeded by Vtach, sudden cardiac death |
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