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Chapter 3 Supraventricular Rhythms II Atrial Fibrillation • No P wave you have fibrillatory “f” waves • Chaotic firing of the atria. No organized contraction = Quivering. • Contribution of atria contraction to ventricular filling is not achieved. • Randon AV conduction so the QRS is normal. F waves • “f” - Fine vs. Coarse • Normal conduction to the ventricle. • Ventricular Rate • Irregulary irregular ventricular depolarization. Ventricular Rate – pg. 37 • Slow: Regular R-R? • Moderate: Regular R-R? • Fast: Regular R-R? Atrial Flutter – pg. 36 • Atrial depolarizes in a systematic, organized manner = sawtooth pattern. • “F” = sawtooth pattern. • Atrial Rate may be as high as 300 • Ventricular rate may be regular • Consistent ratio of F waves cause a 4:1 or 2:1 ratio. Rate • Below (figure 3.3 C) atrial rate is 300 and ventricular rate is 75. Therefor a 4:1 conduction. Fourth F wave is meging with QRS. F waves in II, III, aVF – inferior leads – conduction to the bottom of the heart.