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N201-Atrial Dysrhythmias

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N201-Atrial Dysrhythmias Atrial Dysrhythmias Dysrhythmias Results from disorders of impulse formation, conduction of impulses, or both Normally, the heart discharges impulses spontaneously, which is termed automaticity Dysrhythmias occur as a result of various abnormalities and disease states The cause of the dysrhythmias influences the patients treatment ◆ ALWAYS TREAT THE CAUSE Electrocardiogram (ECG) One small square = 0.04 seconds How many small squares in a big square? 5 One big square = 0.20

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lOMoARcPSD|20734855




lOMoARcPSD|20734855




N201 Atrial dysrhythmias

, lOMoARcPSD|20734855




Atrial Dysrhythmias
Dysrhythmias
➔ Results from disorders of impulse formation, conduction of impulses, or both
➔ Normally, the heart discharges impulses spontaneously, which is
termed automaticity
➔ Dysrhythmias occur as a result of various abnormalities and disease states
➔ The cause of the dysrhythmias influences the patients treatment
◆ ALWAYS TREAT THE CAUSE


Electrocardiogram (ECG)
➔ One small square = 0.04 seconds
➔ How many small squares in a big square? 5
➔ One big square = 0.20


PQRST
➔ P wave: 0.06-0.12 seconds (1.5-3 small squares)
◆ Atrial depolarization leading to atrial contraction
➔ PR interval: 0.12-0.20 seconds (3-5 small squares)
◆ The time it takes for electrical impulse to reach ventricles
➔ QRS complex: 0.06-0.12 seconds (1.5-3 small squares)
◆ Ventricular depolarization (contraction)
➔ T wave: 0.16 seconds
◆ Ventricular relaxation
➔ Indiscernible: means its difficult or impossible to measure


300 Rule
➔ Determined by looking at large boxes in between QRS complexes
◆ Most frequently determine the ventricular rate
◆ Ventricular rate vs atrial rate:
● Ventricular: determined by number of QRS in 6 sec
● Atrial: determined by number of P waves in 6 sec
Connected book
image
Lippincott Williams & Wilkins ECG Interpretation
Publisher: Unknown ISBN: 9781582557014 Edition: Unknown

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