NUR 4227 Lecture Notes - Lecture 6: Calcium Channel Blocker, Ventricular Escape Beat, Rheumatic Fever
Document Summary
Junctional dysrhythmias: dysrhythmia that originates in area of av node, sa node has failed to fire, or impulse has been blocked at the av node. Impulse from av node moves in a retrograde manner that produces an abnormal. P wave occurring just before, or after qrs complex, or hidden in qrs: p wave abnormal. If p wave precedes qrs: pri < . 12. Intrinsic rate >100: clinical associations, cad, hf, cardiomyopathy, electrolyte imbalances, rheumatic heart disease, drugs: digoxin, amphetamines, caffeine, nicotine. If rhythms are rapid, may result in reduction of co and hf: serves as safety mechanism when sa node has not been effective, escape rhythms should not be suppressed, accelerated junctional is d/t sympathetic stimulation. Junctional tachycardia more compromised d/t co: serves as safety mechanism when sa node has not been effective, escape rhythms should not be suppressed, accelerated junctional is d/t sympathetic stimulation. If rhythms are rapid, may result in reduction of co and hf: treatment*
